WO2022226888A1 - Optical system, camera module and electronic device - Google Patents

Optical system, camera module and electronic device Download PDF

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Publication number
WO2022226888A1
WO2022226888A1 PCT/CN2021/090960 CN2021090960W WO2022226888A1 WO 2022226888 A1 WO2022226888 A1 WO 2022226888A1 CN 2021090960 W CN2021090960 W CN 2021090960W WO 2022226888 A1 WO2022226888 A1 WO 2022226888A1
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WIPO (PCT)
Prior art keywords
lens
optical system
image side
object side
optical axis
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PCT/CN2021/090960
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French (fr)
Chinese (zh)
Inventor
杨健
李明
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江西晶超光学有限公司
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Priority to PCT/CN2021/090960 priority Critical patent/WO2022226888A1/en
Publication of WO2022226888A1 publication Critical patent/WO2022226888A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • the invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and an electronic device.
  • an optical system a camera module, and an electronic device are provided.
  • An optical system comprising in sequence from the object side to the image side along the optical axis:
  • the first lens with positive refractive power the object side of the first lens is convex at the near optical axis, and the image side is concave at the near optical axis;
  • the second lens with negative refractive power the object side of the second lens is convex at the near optical axis, and the image side is concave at the near optical axis;
  • the image side of the third lens is convex at the near optical axis
  • the image side of the fourth lens is concave at the near optical axis
  • the fifth lens with refractive power the object side of the fifth lens is concave at the near optical axis, and the image side is convex at the near optical axis;
  • the image side surface of the sixth lens is convex at the near optical axis
  • the seventh lens with refractive power the object side of the seventh lens is convex at the near optical axis, the image side is concave at the near optical axis, and the object side and the image side of the seventh lens are aspherical, and at least one of them has a recurve;
  • the eighth lens with negative refractive power the image side of the eighth lens is concave at the near optical axis, the object side and the image side of the eighth lens are both aspherical, and at least one of them has inflection;
  • optical system also satisfies the relation:
  • TTL is the distance from the object side of the first lens to the imaging plane of the optical system on the optical axis
  • ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
  • a camera module includes an image sensor and the above-mentioned optical system, wherein the image sensor is arranged on the image side of the optical system.
  • An electronic device includes a fixing member and the above-mentioned camera module, wherein the camera module is arranged on the fixing member.
  • FIG. 1 is a schematic structural diagram of an optical system provided by a first embodiment of the present application.
  • FIG. 2 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the first embodiment
  • FIG. 3 is a schematic structural diagram of an optical system provided by a second embodiment of the present application.
  • FIG. 4 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the second embodiment
  • FIG. 5 is a schematic structural diagram of an optical system provided by a third embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application.
  • FIG. 8 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fourth embodiment
  • FIG. 9 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application.
  • FIG. 10 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fifth embodiment
  • FIG. 11 is a schematic structural diagram of an optical system provided by a sixth embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of an optical system provided by a seventh embodiment of the present application.
  • 15 is a schematic diagram of a camera module provided by an embodiment of the application.
  • FIG. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • an embodiment of the present application provides an optical system 10 having an eight-piece structure.
  • the optical system 10 includes a first lens L1 , a second lens L2 , a third lens L1 , a second lens L2 , and a third lens along the optical axis 101 from the object side to the image side in sequence.
  • the first lens L1 has a positive refractive power
  • the second lens L2 has a negative refractive power
  • the eighth lens L8 has a negative refractive power.
  • the optical axes of the lenses in the optical system 10 are on the same straight line, and the straight line is the optical axis 101 of the optical system 10 .
  • Each lens in the optical system 10 can be assembled in a lens barrel to form an imaging lens.
  • the first lens L1 has an object side S1 and an image side S2
  • the second lens L2 has an object side S3 and an image side S4
  • the third lens L3 has an object side S5 and an image side S6
  • the fourth lens L4 has an object side S7 and an image side S8
  • the fifth lens L5 has an object side S9 and an image side S10
  • the sixth lens L6 has an object side S11 and an image side S12
  • the seventh lens L7 has an object side S13 and an image side S14
  • the eighth lens L8 has an object side S15 and an image side S14.
  • the side S16 Like the side S16.
  • the optical system 10 also has an imaging surface S17, which is located on the image side of the eighth lens L8, and the on-axis object point at infinity can converge on the imaging surface S17 after being adjusted by the lens group of the optical system 10.
  • the imaging surface S17 of the optical system 10 coincides with the photosensitive surface of the image sensor.
  • the imaging surface S17 can also be regarded as the photosensitive surface of the image sensor.
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 is concave at the near optical axis
  • the object side S3 of the second lens L2 is convex at the near optical axis
  • the image side S4 is concave at the near optical axis
  • the image side S6 of the third lens L3 is convex at the near optical axis
  • the image side S8 of the fourth lens L4 is concave at the near optical axis
  • the object of the fifth lens L5 The side S9 is concave at the near optical axis
  • the image side S10 is convex at the near optical axis
  • the image side S12 of the sixth lens L6 is convex at the near optical axis
  • the object side S13 of the seventh lens L7 is at the near optical axis.
  • the image side S14 is concave at the near optical axis; the image side S16 of the eighth lens L8 is concave at the near optical axis.
  • both the object side surface and the image side surface of the seventh lens L7 and the eighth lens L8 are aspherical surfaces, and at least one of the object side surface S13 and the image side surface S14 of the seventh lens L7 has inflection, and the eighth lens L8 At least one of the object side surface S15 and the image side surface S16 has a recurve. It should be noted that when it is described that the lens surface has a certain surface shape near the optical axis, that is, the lens surface has this surface shape near the optical axis 101, and the lens surface can have a region near the maximum effective aperture.
  • the surface has a recurve.
  • the lens surface has a certain surface shape near the maximum effective aperture, that is, the lens surface has this surface shape near the maximum effective aperture in the direction from the center to the edge.
  • the light incident at a large angle can be smoothly transitioned in the optical system 10, which can effectively suppress the generation of spherical aberration and astigmatism, and is also conducive to obtaining a larger imaging image height.
  • optical system 10 in the embodiment of the present application also satisfies the following relationship:
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system 10 on the optical axis 101
  • ImgH is the image height corresponding to the maximum angle of view of the optical system 10. half. ImgH may also be referred to as the maximum imaging circle radius of the optical system 10, and in some embodiments, when the optical system 10 is assembled with the image sensor, half of the diagonal length of the rectangular effective pixel area on the image sensor is equal to or approximately equal to the ImgH numerical value.
  • the optical system 10 When the optical system 10 with an eight-piece structure satisfies the conditions of the above relational expression, due to the limitation of the number of lenses, refractive power, surface shape and the upper limit of the relational expression, the optical system 10 will have the characteristics of a large image surface, which can be matched with higher pixel images
  • the sensor can have a clearer imaging picture, and can also prevent the axial dimension of the eight-piece optical system 10 from being too long, thereby allowing for a miniaturized design.
  • the optical system 10 When the above-mentioned optical system 10 satisfies the lower limit of the relational expression, it can also prevent the total optical length of the eight-piece optical system 10 from being too short relative to the imaging image height, so that the incident light has enough spatial deflection when passing through each lens to achieve a smooth transition , reducing the sensitivity of imaging sharpness to the total optical length of the system, thereby maintaining the stability of imaging quality, and also helping to reduce the difficulty of system design. To sum up, the optical system 10 with the above design can maintain good or even better imaging quality under the premise of realizing a miniaturized design with a shorter overall axial length, and is also beneficial to reduce the difficulty of system design.
  • the relationship satisfied by the optical system 10 may specifically be 1.205, 1.21, 1.215, 1.218, 1.226, 1.234, 1.246, 1.253, 1.263, 1.27 or 1.276.
  • the total optical length TTL of the optical system 10 satisfies 8.89mm ⁇ TTL ⁇ 9.15mm, for example, may be 8.9, 8.93, 8.95, 9, 9.04, 9.08 or 9.13, and the numerical unit is mm.
  • the optical system 10 also satisfies at least one of the following relationships, and when any relationship is satisfied, it can have corresponding technical effects:
  • the refractive powers of the first lens L1 and the second lens L2 are reasonably configured, and the second lens L2 with negative refractive power can effectively correct aberrations such as distortion and field curvature generated by the first lens L1 and reduce incident light rays.
  • the deflection angle when passing through the first lens L1 and the second lens L2 is beneficial to reduce the overall sensitivity of the optical system 10 and improve the overall imaging quality.
  • the relationship satisfied by the optical system 10 may specifically be -2.8, -2.76, -2.7, -2.61, -2.53, -2.39, -2.27, -2.2, or -2.17.
  • semiFOV is half of the maximum angle of view of the optical system 10 .
  • semiFOV can also be understood as half of the maximum field of view corresponding to the diagonal direction of the rectangular pixel area of the image sensor.
  • the angle of view and the image height of the optical system 10 can be reasonably configured, on the one hand, the deflection angle of the light in the optical system 10 can be reduced, so as to better balance the aberration of the optical system 10; On the one hand, the axial dimension of the optical system 10 can be further compressed; on the other hand, the optical system 10 can further realize the design of a large image plane; in addition, it is also beneficial to reduce the difficulty of injection molding of each lens.
  • the relationship satisfied by the optical system 10 may specifically be 7.77, 7.79, 7.83, 7.85, 7.88 or 7.9, and the numerical unit is mm.
  • sd81 is the maximum effective semi-aperture of the object side S15 of the eighth lens L8
  • sd31 is the maximum effective semi-aperture of the object side S5 of the third lens L3.
  • the relationship satisfied by the optical system 10 may specifically be 3, 3.04, 3.1, 3.16, 3.2, 3.24, 3.28, 3.3 or 3.32.
  • f8 is the effective focal length of the eighth lens L8, and sag82 is the sagittal height of the image side surface S16 of the eighth lens L8 at the maximum effective aperture.
  • the relationship satisfied by the optical system 10 may specifically be 3.5, 3.54, 3.6, 3.67, 3.74, 3.8, 3.89, 3.94, 3.98 or 5.
  • R71 is the radius of curvature of the object side S13 of the seventh lens L7 at the optical axis 101
  • sd67 is the maximum effective half-aperture of the object side S13 of the seventh lens L7 and the image side S12 of the sixth lens L6 The difference in the largest effective half-aperture.
  • sd67 is greater than 0, it means that the maximum effective aperture of the object side S13 of the seventh lens L7 is larger than the maximum effective aperture of the image side S12 of the sixth lens L6.
  • the value of the maximum effective half diameter is half of the maximum effective diameter.
  • the surface shape of the seventh lens L7 and the aperture difference between the sixth lens L6 and the seventh lens L7 can be reasonably constrained, so that the level difference can be improved while the deflection angle of the incident light is kept small, thereby contributing to the
  • the optical system 10 realizes a large image plane design, and also helps to shorten the overall length of the optical system 10 , so as to realize the miniaturized design of the optical system 10 .
  • the step difference from the image side S12 of the sixth lens L6 to the object side S13 of the seventh lens L7 is too small, which is not conducive to realizing the design of a large image plane, and also causes the light incident at a large angle to pass through the
  • the deflection between the sixth lens L6 and the seventh lens L7 is too large, the aberration balance of the optical system 10 is destroyed, thereby reducing the imaging quality of the optical system 10;
  • the object side S13 of the seventh lens L7 The radius of curvature is too small, and the surface shape is too curved, so that the deflection angle of the edge light when passing through the seventh lens L7 is easy to be too large, resulting in aberrations that are difficult to correct, increasing the burden of the last lens on the image side for correcting aberrations , which will eventually degrade the image quality.
  • the relationship satisfied by the optical system 10 may specifically be 9.3, 9.5, 9.8, 10, 10.7, 11.2, 12, 13.4, 14.5 or 15.
  • the radius of curvature R71 of the object side surface S13 of the seventh lens L7 at the optical axis 101 satisfies 4.817mm ⁇ R71 ⁇ 5.94mm, and specifically may be 4.85, 4.9, 5, 5.4, 5.55, 5.63, 5.76, 5.8 , 5.86 or 5.9, the unit of value is mm.
  • the surface shape of the image side S14 of the seventh lens L7 and the object side S15 of the eighth lens L8 can be reasonably constrained to achieve the effect of effectively correcting the system aberration, improve the imaging quality, and at the same time promote the corresponding lens surface to be
  • the sagittal height at the maximum effective aperture will not be too large, and the surface shape will not be too distorted, so that the lens surface shape is controlled within the range that is easy to process and shape.
  • the relationship satisfied by the optical system 10 may specifically be 1.4, 1.44, 1.48, 1.52, 1.56, 1.65, 1.7 or 1.72.
  • R52 is the curvature radius of the image side S10 of the fifth lens L5 at the optical axis 101
  • sd56 is the maximum effective semi-aperture of the object side S11 of the sixth lens L6 and the image of the fifth lens L5 The difference between the maximum effective half-diameter of the side S10.
  • sd56 is greater than 0, it means that the maximum effective aperture of the object side S11 of the sixth lens L6 is larger than the maximum effective aperture of the image side S10 of the fifth lens L5.
  • the image side surface of the fifth lens L5 When it is lower than the lower limit of the relational expression, the image side surface of the fifth lens L5 is flat, which is not enough to deflect the edge light to a reasonable direction, so that the edge illuminance of the imaged image is easily reduced, and then vignetting occurs; when it is higher than the upper limit of the relational expression, the In turn, the image side surface S10 of the fifth lens L5 is too curved, and the tolerance sensitivity increases, making it difficult to process and shape.
  • the relationship satisfied by the optical system 10 may specifically be -55, -50, -45, -36, -25, -20, -15 or -12.
  • the radius of curvature R52 of the image side surface S10 of the fifth lens L5 at the optical axis 101 satisfies -34.688mm ⁇ R52 ⁇ -4.848mm, and may specifically be -32, -30, -26, -20, - 15, -12, -9, the unit of value is mm.
  • the relationship satisfied by the optical system 10 may specifically be 0.98, 1, 1.02, 1.04 or 1.06.
  • the numerical reference wavelength of the effective focal length and combined focal length in the above relationship conditions is 555nm, and the effective focal length and combined focal length at least refer to the value of the corresponding lens or lens group at the near optical axis.
  • the above relational conditions and the technical effects brought about are aimed at the optical system 10 with the above-mentioned lens design.
  • the lens design (number of lenses, refractive power configuration, surface configuration, etc.) of the optical system 10 cannot be guaranteed, it will be difficult to ensure that the optical system 10 can still have corresponding technical effects when these relational expressions are satisfied, and may even lead to Camera performance is significantly degraded.
  • the optical system 10 also includes an aperture stop STO.
  • the aperture stop STO can be used to limit the amount of incident light reaching the imaging surface S17, and can also be used to block ineffective light rays to improve aberrations and control the depth of field.
  • the aperture stop STO is disposed on the object side of the first lens L1, for example, overlapped on the object side S1 of the first lens L1.
  • the aperture stop STO may also be referred to as being located on the object side of the first lens L1.
  • At least one lens of the optical system 10 has an aspherical surface.
  • the lens can be said to have an aspherical surface.
  • the object side surface and the image side surface of each lens can be designed as aspherical surfaces.
  • the aspherical design can help the optical system 10 to more effectively eliminate aberrations and improve imaging quality.
  • at least one lens of the optical system 10 may have a spherical surface shape, and the design of the spherical surface shape can reduce the manufacturing difficulty and manufacturing cost of the lens.
  • each lens surface in the optical system 10 can be formed by a combination of aspherical and spherical surfaces. It should be noted that when the object side or image side of a lens is aspheric, the surface may have a recurve structure, and the surface type of the surface will change from the center to the edge. Convex at the optical axis and concave near the maximum effective aperture. .
  • Z is the distance from the corresponding point on the aspheric surface to the tangent plane of the surface at the optical axis 101
  • r is the distance from the corresponding point on the aspheric surface to the optical axis
  • c is the curvature of the aspheric surface at the optical axis 101
  • k is the Conic coefficient
  • Ai is the coefficient of the high-order term corresponding to the i-th-order high-order term in the aspheric surface formula.
  • the material of at least one lens in the optical system 10 is plastic (PC, Plastic), and the plastic material may be polycarbonate, gum, or the like.
  • the material of at least one lens in the optical system 10 is glass (GL, Glass).
  • the lens with plastic material can reduce the production cost of the optical system 10 , while the lens with glass material can withstand higher or lower temperature and has excellent optical effect and better stability.
  • lenses of different materials may be provided in the optical system 10 , that is, a design combining glass lenses and plastic lenses may be used, but the specific configuration relationship can be determined according to actual requirements, which is not exhaustive here.
  • optical system 10 of the present application will be described below through more specific embodiments:
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is concave near the maximum effective aperture, and the image side S12 is convex near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is concave near the maximum effective aperture. .
  • each lens surface of the first lens L1 to the eighth lens L8 is aspherical, and the material of each lens is plastic (PC).
  • the respective lens parameters of the optical system 10 in the first embodiment are shown in Table 1 below.
  • the elements from the object side to the image side of the optical system 10 are sequentially arranged in the order from top to bottom in Table 1, wherein the stop represents the aperture stop STO.
  • the filter 110 is an infrared cut-off filter.
  • the filter 110 can be used as a part of the optical system 10 or can be removed from the optical system 10, but when the filter 110 is removed, the total optical length of the optical system 10 remains unchanged.
  • the Y radius in Table 1 is the curvature radius of the corresponding surface of the lens at the optical axis 101 .
  • the absolute value of the first value of the lens in the "thickness" parameter column is the thickness of the lens on the optical axis 101 (for example, the surface number S1 in Table 1 represents the object side of the first lens, and the surface number S2 The surface represents the image side of the first lens), and the absolute value of the second value is the distance from the image side of the lens to the next optical surface (the object side or diaphragm surface of the latter lens) on the optical axis 101, where the light
  • the thickness parameter of the diaphragm represents the distance on the optical axis 101 from the diaphragm surface to the object surface of the adjacent lens on the image side.
  • the reference wavelength of refractive index and Abbe number of each lens in the table is 587.6nm
  • the reference wavelength of focal length (effective focal length) is 555nm
  • the numerical units of Y radius, thickness, focal length (effective focal length) are all millimeters (mm) .
  • the parameter data and the lens surface structure used for the calculation of the relational expressions in the following embodiments are subject to the data in the lens parameter table in the corresponding embodiments.
  • the effective focal length f of the optical system 10 in the first embodiment is 7.606 mm
  • the aperture number FNO is 1.95
  • the total optical length TTL is 8.89 mm
  • the maximum field of view angle FOV is 87.668°
  • the maximum field of view angle FOV is It can be seen that the optical system 10 of this embodiment has a wide-angle characteristic.
  • Table 2 shows the aspheric coefficients of the corresponding lens surfaces in Table 1, where K is the conic coefficient and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface type formula.
  • the optical system 10 satisfies the following relationships:
  • TTL/ImgH 1.201; when the optical system 10 with an eight-piece structure satisfies the conditions of the above relational expression, due to the limitation of the number of lenses, refractive power, surface shape and the upper limit of the relational expression, the optical system 10 will have the characteristics of a large image surface, which can be In combination with an image sensor with a higher pixel, a clearer imaging picture can be obtained, and the axial dimension of the eight-piece optical system 10 can be prevented from being too long, so that the miniaturized design can be taken into account.
  • the optical system 10 When the above-mentioned optical system 10 satisfies the lower limit of the relational expression, it can also prevent the total optical length of the eight-piece optical system 10 from being too short relative to the imaging image height, so that the incident light has enough spatial deflection when passing through each lens to achieve a smooth transition , reducing the sensitivity of imaging sharpness to the total optical length of the system, thereby maintaining the stability of imaging quality, and also helping to reduce the difficulty of system design.
  • the refractive powers of the first lens L1 and the second lens L2 are reasonably configured, and the second lens L2 with negative refractive power can effectively correct the distortion and field curvature generated by the first lens L1 Aberration, reducing the deflection angle of the incident light when passing through the first lens L1 and the second lens L2, thereby helping to reduce the overall sensitivity of the optical system 10 and improve the overall imaging quality.
  • f/tan(semiFOV) 7.92mm; when this relationship is satisfied, the field of view and image height of the optical system 10 can be reasonably configured, on the one hand, the deflection angle of the light in the optical system 10 can be reduced, so that the On the one hand, the axial dimension of the optical system 10 can be further compressed; on the other hand, the optical system 10 can further realize the design of a large image plane; in addition, it is beneficial to reduce the difficulty of injection molding of each lens.
  • the aperture of the eighth lens L8 is kept larger than the effective aperture of the third lens L3 but does not cause excessive deflection of the incident light, which is conducive to making the optical
  • the system 10 obtains a larger image surface to match the image sensor with higher pixels, thereby improving the resolution.
  • the eighth lens L8 when this relationship is satisfied, it is beneficial for the eighth lens L8 to contribute a reasonable negative refractive power to the eight-piece optical system 10 to correct the aberration generated by the object lens, and at the same time, it is beneficial to shorten the total length of the system.
  • the value of the maximum effective half diameter is half of the maximum effective diameter.
  • the surface shape of the image side S14 of the seventh lens L7 and the object side S15 of the eighth lens L8 can be reasonably constrained, so as to effectively correct the system aberration and improve the image quality.
  • the sag height of the corresponding lens surface shape at the maximum effective aperture will not be too large, and the surface shape will not be too distorted, so that the lens surface shape can be controlled within a range that is easy to process and shape.
  • R52/sd56 -19.39; when this relationship is satisfied, on the one hand, it is beneficial to constrain the surface shape of the image side S10 of the fifth lens L5, so that the incident light can be incident at a smaller deflection angle when passing through the image side S10 of the fifth lens L5 into the sixth lens L6; on the other hand, it is also beneficial to realize a large image surface design while shortening the overall length of the optical system 10.
  • f/f1 1.04; when this relationship is satisfied, it will be beneficial for the first lens L1 to contribute a suitable positive refractive power to the entire optical system 10, so as to effectively reduce the head size of the optical system 10, shorten the overall length of the system, and increase the size of the image surface. Provide enough space.
  • FIG. 2 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the first embodiment.
  • the reference wavelength of the astigmatism map and the distortion map is 555nm, and the ordinates of the two represent the image height IMG HT in mm.
  • Longitudinal Spherical Aberration shows the deviation of the convergence focus of light of different wavelengths after passing through the lens.
  • the ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane to the intersection of the light and the optical axis (unit is mm).
  • FIG. 2 also includes a field curvature astigmatism diagram (Astigmatic Field Curves) of the optical system 10, wherein the S curve represents the sagittal field curvature at 555 nm, and the T curve represents the meridional field curvature at 555 nm.
  • S curve represents the sagittal field curvature at 555 nm
  • T curve represents the meridional field curvature at 555 nm.
  • the field curvature of the optical system is small, the maximum field curvature is controlled within ⁇ 0.025mm, the curvature of the image plane is effectively suppressed, and the sagittal field curvature and meridional field curvature in each field of view tend to be consistent.
  • the astigmatism of each field of view is better controlled, so it can be seen that the optical system 10 has a clear image from the center to the edge of the field of view.
  • the maximum distortion of the optical system 10 is controlled within 2.5%, so that the degree of distortion is well controlled.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is convex at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • the lens parameters of the optical system 10 in this embodiment are given in Table 3 and Table 4, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • TTL/ImgH 1.201 R71/sd67 11.154 f2/f12 -2.411 sag81/sag72 1.558 f/tan(semiFOV)(mm) 7.784 R52/sd56 -21.301 sd81/sd31 3.274 f/f1 1.002 f8/sag82 4.851
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is concave near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • optical system 10 in this embodiment satisfies the following relationship:
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is concave near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • optical system 10 in this embodiment satisfies the following relationship:
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with negative refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is convex near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • optical system 10 in this embodiment satisfies the following relationship:
  • TTL/ImgH 1.214 R71/sd67 9.275 f2/f12 -2.141 sag81/sag72 1.581 f/tan(semiFOV)(mm) 7.917 R52/sd56 -39.256 sd81/sd31 3.340 f/f1 1.071 f8/sag82 3.499
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is convex near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • optical system 10 in this embodiment satisfies the following relationship:
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power.
  • the surface shapes of the lenses of the optical system 10 are as follows:
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
  • the object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is convex near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
  • the object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
  • optical system 10 in this embodiment satisfies the following relationship:
  • the optical system 10 of this embodiment can have a clear image.
  • the optical system 10 in the above-mentioned embodiments can maintain good or even better imaging quality under the premise of realizing a miniaturized design with a shorter overall axial length, and it is also beneficial to reduce the design of the system. difficulty.
  • an embodiment of the present application further provides a camera module 20 .
  • the camera module 20 includes an optical system 10 and an image sensor 210 .
  • the image sensor 210 is disposed on the image side of the optical system 10 , and the two can be fixed by a bracket. .
  • the image sensor 210 may be a CCD sensor (Charge Coupled Device, charge coupled device) or a CMOS sensor (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor).
  • the imaging surface S17 of the optical system 10 overlaps the photosensitive surface of the image sensor 210 .
  • the camera module 20 can also maintain good or even better imaging quality while the total axial length is compressed.
  • the electronic device 30 includes a fixing member 310 , and the camera module 20 is mounted on the fixing member 310 , and the fixing member 310 may be a display screen, a circuit board, a middle frame, a back cover and other components.
  • the electronic device 30 can be, but is not limited to, a smart phone, a smart watch, a smart glasses, an e-book reader, a tablet computer, a biometric device (such as a fingerprint recognition device or a pupil recognition device, etc.), a PDA (Personal Digital Assistant, personal digital assistant) Wait.
  • the above-mentioned camera module 20 can maintain a good image quality while the overall length is compressed, when the above-mentioned camera module 20 is used, the internal space of the electronic device 30 occupied by the camera module 20 can be reduced, and the thickness of the electronic device 30 can be avoided. Obstacles are created, and at the same time, the photographing performance of the electronic device 30 can be maintained.
  • the "electronic device” used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via wired lines (eg, via a public switched telephone network (PSTN), digital subscriber line, DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), such as digital video broadcast broadcasting handheld, DVB-H) network digital television network, satellite network, AM-FM (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal) wireless interface to receive/transmit communication signals device of.
  • PSTN public switched telephone network
  • DSL digital subscriber line
  • DSL digital cable, direct cable connection, and/or another data connection/network
  • WLAN wireless local area networks
  • AM-FM amplitude modulation-frequency modulation, AM-FM
  • wireless communication terminals Electronic devices arranged to communicate over a wireless interface may be referred to as “wireless communication terminals", “wireless terminals” and/or “mobile terminals”.
  • mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistants (PDAs) with intranet access, web browsers, memo pads, calendars, and/or global positioning system (GPS) receivers; and conventional laptops and/or palmtops A receiver or other electronic device including a radiotelephone transceiver.
  • PCS personal communication system
  • PDAs Internet/ Personal digital assistants
  • GPS global positioning system
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
  • a first feature "on” or “under” a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch.
  • the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

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Abstract

An optical system (10), a camera module (20) and an electronic device (30). The optical system (10) comprises: a first lens (L1) having positive refractive power, an object side surface (S1) of which is convex and an image side surface (S2) of which is concave; a second lens (L2) having negative refractive power, an object side surface (S3) of which is convex and an image side surface (S4) of which is concave; a third lens (L3), an image side surface (S6) of which is convex; a fourth lens (L4), an image side surface (S8) of which is concave; a fifth lens (L5), an object side surface (S9) of which is concave and an image side surface (S10) of which is convex; a sixth lens (L6), an image side surface (S12) of which is convex; a seventh lens (L7), an object side surface (S13) of which is convex and an image side surface (S14) of which is concave; and an eighth lens (L8) having negative refractive power, an image side surface (S16) of which is concave. The optical system (10) satisfies: 1.2<TTL/ImgH<1.3.

Description

光学***、摄像模组及电子设备Optical systems, camera modules and electronic equipment 技术领域technical field
本发明涉及摄影成像技术领域，特别是涉及一种光学***、摄像模组及电子设备。The invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and an electronic device.
背景技术Background technique
随着智能手机、智能手表等便携式电子设备对摄影要求的提高，行业内对摄像模组的改进也面临着越来越多的挑战。一方面，便携式电子设备呈现轻薄化发展趋势，这一趋势则要求尽可能地压缩设备中各模组的尺寸以节省设备内部空间，特别是对于轴向尺寸普遍较长的摄像模组而言；另一方面，还需确保摄像模组在小型化设计过程中依然拥有良好的成像质量。With the increasing requirements for photography of portable electronic devices such as smartphones and smart watches, the improvement of camera modules in the industry is also facing more and more challenges. On the one hand, portable electronic devices show a trend of becoming thinner and lighter, and this trend requires the size of each module in the device to be compressed as much as possible to save the internal space of the device, especially for camera modules with generally long axial dimensions; On the other hand, it is also necessary to ensure that the camera module still has good imaging quality in the process of miniaturization design.
因此，如何通过配置摄像模组中的透镜数量、屈折力、面型等配置，以使摄像模组在实现小型化设计的同时保持良好的成像质量，已然成为目前行业内欲解决的问题之一。Therefore, how to configure the number of lenses, refractive power, surface shape and other configurations in the camera module so that the camera module can maintain a good imaging quality while achieving a miniaturized design has become one of the problems to be solved in the current industry. .
发明内容SUMMARY OF THE INVENTION
根据本申请的各种实施例，提供一种光学***、摄像模组及电子设备。According to various embodiments of the present application, an optical system, a camera module, and an electronic device are provided.
一种光学***，沿光轴由物侧至像侧依次包括：An optical system, comprising in sequence from the object side to the image side along the optical axis:
具有正屈折力的第一透镜，所述第一透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；The first lens with positive refractive power, the object side of the first lens is convex at the near optical axis, and the image side is concave at the near optical axis;
具有负屈折力的第二透镜，所述第二透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；The second lens with negative refractive power, the object side of the second lens is convex at the near optical axis, and the image side is concave at the near optical axis;
具有屈折力的第三透镜，所述第三透镜的像侧面于近光轴处为凸面；a third lens with refractive power, the image side of the third lens is convex at the near optical axis;
具有屈折力的第四透镜，所述第四透镜的像侧面于近光轴处为凹面；a fourth lens with refractive power, the image side of the fourth lens is concave at the near optical axis;
具有屈折力的第五透镜，所述第五透镜的物侧面于近光轴处为凹面，像侧面于近光轴处为凸面；The fifth lens with refractive power, the object side of the fifth lens is concave at the near optical axis, and the image side is convex at the near optical axis;
具有屈折力的第六透镜，所述第六透镜的像侧面于近光轴处为凸面；a sixth lens with refractive power, the image side surface of the sixth lens is convex at the near optical axis;
具有屈折力的第七透镜，所述第七透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面，所述第七透镜的物侧面和像侧面皆为非球面，且其中至少一者存在反曲；The seventh lens with refractive power, the object side of the seventh lens is convex at the near optical axis, the image side is concave at the near optical axis, and the object side and the image side of the seventh lens are aspherical, and at least one of them has a recurve;
具有负屈折力的第八透镜，所述第八透镜的像侧面于近光轴处为凹面，所述第八透镜的物侧面和像侧面皆为非球面，且其中至少一者存在反曲；The eighth lens with negative refractive power, the image side of the eighth lens is concave at the near optical axis, the object side and the image side of the eighth lens are both aspherical, and at least one of them has inflection;
所述光学***还满足关系：The optical system also satisfies the relation:
1.2＜TTL/ImgH＜1.3；1.2<TTL/ImgH<1.3;
TTL为所述第一透镜的物侧面至所述光学***的成像面于光轴上的距离，ImgH为所述光学***的最大视场角所对应的像高的一半。TTL is the distance from the object side of the first lens to the imaging plane of the optical system on the optical axis, and ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
一种摄像模组，包括图像传感器及上述的光学***，所述图像传感器设于所述光学***的像侧。A camera module includes an image sensor and the above-mentioned optical system, wherein the image sensor is arranged on the image side of the optical system.
一种电子设备，包括固定件及上述的摄像模组，所述摄像模组设置于所述固定件。An electronic device includes a fixing member and the above-mentioned camera module, wherein the camera module is arranged on the fixing member.
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.
附图说明Description of drawings
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。In order to better describe and illustrate embodiments and/or examples of those inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode presently understood of these inventions.
图1为本申请第一实施例提供的光学***的结构示意图；1 is a schematic structural diagram of an optical system provided by a first embodiment of the present application;
图2包括第一实施例中光学***的纵向球差图、像散图和畸变图；FIG. 2 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the first embodiment;
图3为本申请第二实施例提供的光学***的结构示意图；3 is a schematic structural diagram of an optical system provided by a second embodiment of the present application;
图4包括第二实施例中光学***的纵向球差图、像散图和畸变图；FIG. 4 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the second embodiment;
图5为本申请第三实施例提供的光学***的结构示意图；5 is a schematic structural diagram of an optical system provided by a third embodiment of the present application;
图6包括第三实施例中光学***的纵向球差图、像散图和畸变图；6 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the third embodiment;
图7为本申请第四实施例提供的光学***的结构示意图；FIG. 7 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application;
图8包括第四实施例中光学***的纵向球差图、像散图和畸变图；FIG. 8 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fourth embodiment;
图9为本申请第五实施例提供的光学***的结构示意图；9 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application;
图10包括第五实施例中光学***的纵向球差图、像散图和畸变图；FIG. 10 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fifth embodiment;
图11为本申请第六实施例提供的光学***的结构示意图；11 is a schematic structural diagram of an optical system provided by a sixth embodiment of the present application;
图12包括第六实施例中光学***的纵向球差图、像散图和畸变图；12 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the sixth embodiment;
图13为本申请第七实施例提供的光学***的结构示意图；13 is a schematic structural diagram of an optical system provided by a seventh embodiment of the present application;
图14包括第七实施例中光学***的纵向球差图、像散图和畸变图；14 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the seventh embodiment;
图15为本申请一实施例提供的摄像模组的示意图；15 is a schematic diagram of a camera module provided by an embodiment of the application;
图16为本申请一实施例提供的电子设备的结构示意图。FIG. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
具体实施方式Detailed ways
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.
参考图1，本申请的实施例提供了一种具有八片式结构的光学***10，光学***10沿光轴101由物侧至像侧依次包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7及第八透镜L8。其中第一透镜L1具有正屈折力，第二透镜L2具有负屈折力，第八透镜L8具有负屈折力。光学***10中各透镜的光轴处于同一直线上，该直线即为光学***10的光轴101。光学***10中的各透镜可装配于镜筒中以形成摄像镜头。Referring to FIG. 1 , an embodiment of the present application provides an optical system 10 having an eight-piece structure. The optical system 10 includes a first lens L1 , a second lens L2 , a third lens L1 , a second lens L2 , and a third lens along the optical axis 101 from the object side to the image side in sequence. Lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8. The first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, and the eighth lens L8 has a negative refractive power. The optical axes of the lenses in the optical system 10 are on the same straight line, and the straight line is the optical axis 101 of the optical system 10 . Each lens in the optical system 10 can be assembled in a lens barrel to form an imaging lens.
第一透镜L1具有物侧面S1和像侧面S2，第二透镜L2具有物侧面S3和像侧面S4，第三透镜L3具有物侧面S5和像侧面S6，第四透镜L4具有物侧面S7和像侧面S8，第五透镜L5具有物侧面S9及像侧面S10，第六透镜L6具有物侧面S11及像侧面S12，第七透镜L7具有物侧面S13及像侧面S14，第八透镜L8具有物侧面S15及像侧面S16。另外，光学***10还具有成像面S17，成像面S17位于第八透镜L8的像侧，无限远处的轴上物点经光学***10的透镜组调节后能够会聚于成像面S17上。一般地，光学***10的成像面S17与图像传感器的感光面重合，为方便理解，也可将成像面S17视为图像传感器的感光面。The first lens L1 has an object side S1 and an image side S2, the second lens L2 has an object side S3 and an image side S4, the third lens L3 has an object side S5 and an image side S6, and the fourth lens L4 has an object side S7 and an image side S8, the fifth lens L5 has an object side S9 and an image side S10, the sixth lens L6 has an object side S11 and an image side S12, the seventh lens L7 has an object side S13 and an image side S14, and the eighth lens L8 has an object side S15 and an image side S14. Like the side S16. In addition, the optical system 10 also has an imaging surface S17, which is located on the image side of the eighth lens L8, and the on-axis object point at infinity can converge on the imaging surface S17 after being adjusted by the lens group of the optical system 10. Generally, the imaging surface S17 of the optical system 10 coincides with the photosensitive surface of the image sensor. For the convenience of understanding, the imaging surface S17 can also be regarded as the photosensitive surface of the image sensor.
在本申请的实施例中，第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；第三透镜L3的像侧面S6于近光轴处为凸面；第四透镜L4的像侧面S8于近光轴处为凹面；第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；第六透镜L6的像侧面S12于近光轴处为凸面；第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；第八透镜L8的像侧面S16于近光轴处为凹面。另外，第七透镜L7和第八透镜L8的物侧面及像侧面皆为非球面，且第七透镜L7的物侧面S13和像侧面S14中的至少一者存在反曲，以及第八透镜L8的物侧面S15和像侧面S16中的至少一者存在反曲。应注意的是，当描述透镜表面于近光轴处具有某种面型时，即该透镜表面于光轴101附近具有该种面型，而该透镜表面于靠近最大有效口径处的区域可以拥有与之相同的面型或相反的面型，当同一透镜表面存在相反的两种面型时，即可称该面存在反曲。当描述透镜表面于近最大有效口径处具有某种面型时，即该透镜表面由中心往边缘的方向在靠近最大有效口径处附近具有该种面型。In the embodiments of the present application, the object side S1 of the first lens L1 is convex at the near optical axis, the image side S2 is concave at the near optical axis; the object side S3 of the second lens L2 is convex at the near optical axis , the image side S4 is concave at the near optical axis; the image side S6 of the third lens L3 is convex at the near optical axis; the image side S8 of the fourth lens L4 is concave at the near optical axis; the object of the fifth lens L5 The side S9 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the image side S12 of the sixth lens L6 is convex at the near optical axis; the object side S13 of the seventh lens L7 is at the near optical axis. The image side S14 is concave at the near optical axis; the image side S16 of the eighth lens L8 is concave at the near optical axis. In addition, both the object side surface and the image side surface of the seventh lens L7 and the eighth lens L8 are aspherical surfaces, and at least one of the object side surface S13 and the image side surface S14 of the seventh lens L7 has inflection, and the eighth lens L8 At least one of the object side surface S15 and the image side surface S16 has a recurve. It should be noted that when it is described that the lens surface has a certain surface shape near the optical axis, that is, the lens surface has this surface shape near the optical axis 101, and the lens surface can have a region near the maximum effective aperture. With the same surface type or the opposite surface type, when there are two opposite surface types on the same lens surface, it can be said that the surface has a recurve. When describing that the lens surface has a certain surface shape near the maximum effective aperture, that is, the lens surface has this surface shape near the maximum effective aperture in the direction from the center to the edge.
通过上述透镜数量、屈折力及面型设计，将利于大角度入射的光线在光学***10中平缓过渡，可有效抑制球差、像散的产生，同时也有利于获得较大的成像像高。Through the above-mentioned design of the number of lenses, refractive power and surface shape, the light incident at a large angle can be smoothly transitioned in the optical system 10, which can effectively suppress the generation of spherical aberration and astigmatism, and is also conducive to obtaining a larger imaging image height.
进一步地，本申请实施例中的光学***10还满足如下关系：Further, the optical system 10 in the embodiment of the present application also satisfies the following relationship:
1.2＜TTL/ImgH＜1.3；TTL为第一透镜L1的物侧面S1至光学***10的成像面S17于光轴101上的距离，ImgH为光学***10的最大视场角所对应的像高的一半。ImgH也可称为光学***10的最大成像圆半径，且在一些实施例中，当光学***10与图像传感器装配时，图像传感器上矩形有效像素区域 对角线长度的一半等于或近似等于ImgH的数值。当具有八片式结构的光学***10满足上述关系式条件时，由于透镜数量、屈折力、面型和关系式上限的限制，光学***10将拥有大像面特性，可配合更高像素的图像传感器以拥有更为清晰的成像画面，另外也可防止八片式光学***10的轴向尺寸过长，进而可兼顾小型化设计。当上述光学***10满足关系式下限时，也可防止八片式光学***10的光学总长相对成像像高而言过短，使入射光线在经过各透镜时有足够的空间偏折以实现平缓过渡，降低成像清晰度对***光学总长的敏感度，从而保持成像质量的稳定，同时也有利于降低***的设计难度。综上，拥有上述设计的光学***10，能够在实现较短轴向总长的小型化设计前提下，保持良好甚至更佳的成像质量，且还有利于降低***的设计难度。在一些实施例中，光学***10所满足的该关系具体可以为1.205、1.21、1.215、1.218、1.226、1.234、1.246、1.253、1.263、1.27或1.276。在一些实施例中，光学***10的光学总长TTL满足8.89mm≤TTL≤9.15mm，例如具体可以为8.9、8.93、8.95、9、9.04、9.08或9.13，数值单位为mm。1.2<TTL/ImgH<1.3; TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system 10 on the optical axis 101, and ImgH is the image height corresponding to the maximum angle of view of the optical system 10. half. ImgH may also be referred to as the maximum imaging circle radius of the optical system 10, and in some embodiments, when the optical system 10 is assembled with the image sensor, half of the diagonal length of the rectangular effective pixel area on the image sensor is equal to or approximately equal to the ImgH numerical value. When the optical system 10 with an eight-piece structure satisfies the conditions of the above relational expression, due to the limitation of the number of lenses, refractive power, surface shape and the upper limit of the relational expression, the optical system 10 will have the characteristics of a large image surface, which can be matched with higher pixel images The sensor can have a clearer imaging picture, and can also prevent the axial dimension of the eight-piece optical system 10 from being too long, thereby allowing for a miniaturized design. When the above-mentioned optical system 10 satisfies the lower limit of the relational expression, it can also prevent the total optical length of the eight-piece optical system 10 from being too short relative to the imaging image height, so that the incident light has enough spatial deflection when passing through each lens to achieve a smooth transition , reducing the sensitivity of imaging sharpness to the total optical length of the system, thereby maintaining the stability of imaging quality, and also helping to reduce the difficulty of system design. To sum up, the optical system 10 with the above design can maintain good or even better imaging quality under the premise of realizing a miniaturized design with a shorter overall axial length, and is also beneficial to reduce the difficulty of system design. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 1.205, 1.21, 1.215, 1.218, 1.226, 1.234, 1.246, 1.253, 1.263, 1.27 or 1.276. In some embodiments, the total optical length TTL of the optical system 10 satisfies 8.89mm≤TTL≤9.15mm, for example, may be 8.9, 8.93, 8.95, 9, 9.04, 9.08 or 9.13, and the numerical unit is mm.
此外，在一些实施例中，光学***10还满足以下至少一条关系，且当满足任一关系时均可拥有相应的技术效果：In addition, in some embodiments, the optical system 10 also satisfies at least one of the following relationships, and when any relationship is satisfied, it can have corresponding technical effects:
-3＜f2/f12＜-2；f2为第二透镜L2的有效焦距，f12为第一透镜L1和第二透镜L2的组合焦距。满足该关系时，第一透镜L1和第二透镜L2的屈折力配置合理，具有负屈折力的第二透镜L2可以有效矫正第一透镜L1产生的畸变、场曲等像差，减小入射光线在经过第一透镜L1和第二透镜L2时的偏转角度，从而有利于降低光学***10的总体敏感度，提高整体成像质量。在一些实施例中，光学***10所满足的该关系具体可以为-2.8、-2.76、-2.7、-2.61、-2.53、-2.39、-2.27、-2.2或-2.17。-3<f2/f12<-2; f2 is the effective focal length of the second lens L2, and f12 is the combined focal length of the first lens L1 and the second lens L2. When this relationship is satisfied, the refractive powers of the first lens L1 and the second lens L2 are reasonably configured, and the second lens L2 with negative refractive power can effectively correct aberrations such as distortion and field curvature generated by the first lens L1 and reduce incident light rays. The deflection angle when passing through the first lens L1 and the second lens L2 is beneficial to reduce the overall sensitivity of the optical system 10 and improve the overall imaging quality. In some embodiments, the relationship satisfied by the optical system 10 may specifically be -2.8, -2.76, -2.7, -2.61, -2.53, -2.39, -2.27, -2.2, or -2.17.
7.5mm＜f/tan(semiFOV)＜7.95mm；f为光学***10的有效焦距，semiFOV为光学***10的最大视场角的一半。当装配图像传感器后，semiFOV也可理解为图像传感器矩形像素区域对角线方向所对应的最大视场角的一半。满足该关系时，上述光学***10的视场角和像高能够得到合理配置，一方面能够减小光线在光学***10中的偏折角度，从而较好的平衡光学***10的像差；一方面可进一步压缩光学***10的轴向尺寸；另一方面还能够使光学***10进一步实现大像面设计；此外还有利于降低各透镜注塑加工难度。在一些实施例中，光学***10所满足的该关系具体可以为7.77、7.79、7.83、7.85、7.88或7.9，数值单位为mm。7.5mm<f/tan(semiFOV)<7.95mm; f is the effective focal length of the optical system 10 , and semiFOV is half of the maximum angle of view of the optical system 10 . When the image sensor is assembled, semiFOV can also be understood as half of the maximum field of view corresponding to the diagonal direction of the rectangular pixel area of the image sensor. When this relationship is satisfied, the angle of view and the image height of the optical system 10 can be reasonably configured, on the one hand, the deflection angle of the light in the optical system 10 can be reduced, so as to better balance the aberration of the optical system 10; On the one hand, the axial dimension of the optical system 10 can be further compressed; on the other hand, the optical system 10 can further realize the design of a large image plane; in addition, it is also beneficial to reduce the difficulty of injection molding of each lens. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 7.77, 7.79, 7.83, 7.85, 7.88 or 7.9, and the numerical unit is mm.
2.5＜sd81/sd31＜3.5；sd81为第八透镜L8的物侧面S15的最大有效半口径，sd31为第三透镜L3的物侧面S5的最大有效半口径。满足该关系时，第八透镜L8的孔径相较第三透镜L3的有效口径而言保持在较大但不会引起入射光线过度偏折的范围内，从而有利于使光学***10获得更大尺寸的像面，以匹配更高像素的图像传感器，进而提高解析力。当低于关系式下限时，不仅不利于光学***10实现大像面特性，另外在保证成像清晰度的同时也不利于缩短***总长，难以使光学***10实现小型化设计；当高于关系式的上限时，第三透镜L3的物侧面S5的有效口径过小，不利于光学***10获得足够的光通量，从而降低成像质量。在一些实施例中，光学***10所满足的该关系具体可以为3、3.04、3.1、3.16、3.2、3.24、3.28、3.3或3.32。2.5<sd81/sd31<3.5; sd81 is the maximum effective semi-aperture of the object side S15 of the eighth lens L8, and sd31 is the maximum effective semi-aperture of the object side S5 of the third lens L3. When this relationship is satisfied, the aperture of the eighth lens L8 is kept larger than the effective aperture of the third lens L3 but does not cause excessive deflection of the incident light, thereby facilitating the optical system 10 to obtain a larger size to match the image sensor with higher pixels, thereby improving the resolution. When it is lower than the lower limit of the relational expression, it is not only unfavorable for the optical system 10 to realize the characteristics of large image plane, but also not conducive to shortening the total length of the system while ensuring the imaging clarity, and it is difficult to realize the miniaturization design of the optical system 10; when it is higher than the relational expression When the upper limit is reached, the effective aperture of the object side S5 of the third lens L3 is too small, which is not conducive to the optical system 10 to obtain sufficient luminous flux, thereby reducing the imaging quality. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 3, 3.04, 3.1, 3.16, 3.2, 3.24, 3.28, 3.3 or 3.32.
3.2＜f8/sag82＜5.2；f8为第八透镜L8的有效焦距，sag82为第八透镜L8的像侧面S16于最大有效口径处的矢高。满足该关系时，有利于第八透镜L8为八片式光学***10贡献合理的负屈折力，以矫正物方透镜产生的像差，同时有利于缩短***总长。当低于关系式下限时，第八透镜L8提供的负屈折力强度过大，容易对物方透镜产生的像差矫正过度，且第八透镜L8的像侧面S16面型会过于复杂，将增大透镜成型加工难度；当高于关系式上限时，第八透镜L8提供的负屈折力强度过小，不利于矫正像差，无法保证良好的成像品质。在一些实施例中，光学***10所满足的该关系具体可以为3.5、3.54、3.6、3.67、3.74、3.8、3.89、3.94、3.98或5。3.2<f8/sag82<5.2; f8 is the effective focal length of the eighth lens L8, and sag82 is the sagittal height of the image side surface S16 of the eighth lens L8 at the maximum effective aperture. When this relationship is satisfied, it is beneficial for the eighth lens L8 to contribute a reasonable negative refractive power to the eight-piece optical system 10 to correct the aberration generated by the lens on the object side, and at the same time, it is beneficial to shorten the total length of the system. When it is lower than the lower limit of the relational expression, the negative refractive power provided by the eighth lens L8 is too strong, and it is easy to overcorrect the aberration generated by the object lens, and the surface shape of the image side S16 of the eighth lens L8 will be too complicated, which will increase the The large lens is difficult to form and process; when it is higher than the upper limit of the relational expression, the negative refractive power provided by the eighth lens L8 is too small, which is not conducive to correcting aberrations and cannot guarantee good imaging quality. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 3.5, 3.54, 3.6, 3.67, 3.74, 3.8, 3.89, 3.94, 3.98 or 5.
9＜R71/sd67＜16；R71为第七透镜L7的物侧面S13于光轴101处的曲率半径，sd67为第七透镜L7的物侧面S13最大有效半口径与第六透镜L6的像侧面S12最大有效半口径的差值。当sd67大于0时，则表示第七透镜L7的物侧面S13最大有效口径大于第六透镜L6的像侧面S12最大有效口径。最大有效半口径的数值为最大有效口径的一半。满足该关系时，可合理约束第七透镜L7的面型以及第六透镜L6与第七透镜L7之间的口径差异，从而能够在保持入射光线偏转角较小的同时提高段差，进而 有助于光学***10实现大像面设计，另外也有助于缩短光学***10的总长，以实现光学***10的小型化设计。当高于关系式上限时，第六透镜L6的像侧面S12至第七透镜L7的物侧面S13的段差过小，不利于实现大像面设计，另外也会导致大角度入射的光线在经过第六透镜L6和第七透镜L7之间时偏折过大而破坏光学***10的像差平衡，进而降低光学***10的成像质量；当低于关系式下限时，第七透镜L7的物侧面S13的曲率半径过小，面型过于弯曲，从而使边缘光线在经过第七透镜L7时的偏转角易过大而导致难以矫正的像差产生，增大像方最后一片透镜对矫正像差的负担，最终会降低成像质量。在一些实施例中，光学***10所满足的该关系具体可以为9.3、9.5、9.8、10、10.7、11.2、12、13.4、14.5或15。在一些实施例中，第七透镜L7的物侧面S13于光轴101处的曲率半径R71满足4.817mm≤R71≤5.94mm，具体可以为4.85、4.9、5、5.4、5.55、5.63、5.76、5.8、5.86或5.9，数值单位为mm。9<R71/sd67<16; R71 is the radius of curvature of the object side S13 of the seventh lens L7 at the optical axis 101, sd67 is the maximum effective half-aperture of the object side S13 of the seventh lens L7 and the image side S12 of the sixth lens L6 The difference in the largest effective half-aperture. When sd67 is greater than 0, it means that the maximum effective aperture of the object side S13 of the seventh lens L7 is larger than the maximum effective aperture of the image side S12 of the sixth lens L6. The value of the maximum effective half diameter is half of the maximum effective diameter. When this relationship is satisfied, the surface shape of the seventh lens L7 and the aperture difference between the sixth lens L6 and the seventh lens L7 can be reasonably constrained, so that the level difference can be improved while the deflection angle of the incident light is kept small, thereby contributing to the The optical system 10 realizes a large image plane design, and also helps to shorten the overall length of the optical system 10 , so as to realize the miniaturized design of the optical system 10 . When it is higher than the upper limit of the relational expression, the step difference from the image side S12 of the sixth lens L6 to the object side S13 of the seventh lens L7 is too small, which is not conducive to realizing the design of a large image plane, and also causes the light incident at a large angle to pass through the When the deflection between the sixth lens L6 and the seventh lens L7 is too large, the aberration balance of the optical system 10 is destroyed, thereby reducing the imaging quality of the optical system 10; when it is lower than the lower limit of the relational expression, the object side S13 of the seventh lens L7 The radius of curvature is too small, and the surface shape is too curved, so that the deflection angle of the edge light when passing through the seventh lens L7 is easy to be too large, resulting in aberrations that are difficult to correct, increasing the burden of the last lens on the image side for correcting aberrations , which will eventually degrade the image quality. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 9.3, 9.5, 9.8, 10, 10.7, 11.2, 12, 13.4, 14.5 or 15. In some embodiments, the radius of curvature R71 of the object side surface S13 of the seventh lens L7 at the optical axis 101 satisfies 4.817mm≤R71≤5.94mm, and specifically may be 4.85, 4.9, 5, 5.4, 5.55, 5.63, 5.76, 5.8 , 5.86 or 5.9, the unit of value is mm.
sag81/sag72＜1.75；sag81为第八透镜L8的物侧面S15于最大有效口径处的矢高，sag72为第七透镜L7的像侧面S14于最大有效口径处的矢高。满足该关系时，可合理约束第七透镜L7的像侧面S14和第八透镜L8的物侧面S15的面型，以达到有效矫正***像差的效果，提高成像质量，同时促使相应透镜面型于最大有效口径处的矢高不会过大，面型不会过于扭曲，进而使透镜面型被控制在易于加工成型的范围之内。当高于关系式上限时，第八透镜L8的物侧面S15于最大有效口径处的矢高过大，面型过于扭曲，不可避免会增加透镜的公差敏感度，且透镜的加工成型和装配难度也会随之增加。在一些实施例中，光学***10所满足的该关系具体可以为1.4、1.44、1.48、1.52、1.56、1.65、1.7或1.72。sag81/sag72<1.75; sag81 is the sag of the object side S15 of the eighth lens L8 at the maximum effective aperture, and sag72 is the sag of the image side S14 of the seventh lens L7 at the maximum effective aperture. When this relationship is satisfied, the surface shape of the image side S14 of the seventh lens L7 and the object side S15 of the eighth lens L8 can be reasonably constrained to achieve the effect of effectively correcting the system aberration, improve the imaging quality, and at the same time promote the corresponding lens surface to be The sagittal height at the maximum effective aperture will not be too large, and the surface shape will not be too distorted, so that the lens surface shape is controlled within the range that is easy to process and shape. When it is higher than the upper limit of the relational expression, the sag of the object side surface S15 of the eighth lens L8 at the maximum effective aperture is too large, and the surface shape is too distorted, which will inevitably increase the tolerance sensitivity of the lens, and the processing and assembly of the lens is also difficult. will increase accordingly. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 1.4, 1.44, 1.48, 1.52, 1.56, 1.65, 1.7 or 1.72.
-60＜R52/sd56＜-10；R52为第五透镜L5的像侧面S10于光轴101处的曲率半径，sd56为第六透镜L6的物侧面S11最大有效半口径与第五透镜L5的像侧面S10最大有效半口径的差值。当sd56大于0时，则表示第六透镜L6的物侧面S11最大有效口径大于第五透镜L5的像侧面S10最大有效口径。满足该关系时，一方面有利于约束第五透镜L5的像侧面S10面型，促使入射光线在经过第五透镜L5的像侧面S10时能够以较小的偏转角射入第六透镜L6；另一方面也有利于在缩短光学***10总长的同时实现大像面设计。当低于关系式下限时，第五透镜L5像侧面面型平缓，不足以偏转边缘光线至合理方向，从而易使成像画面的边缘照度降低，进而出现暗角；当高于关系式上限时，又会导致第五透镜L5的像侧面S10面型过于弯曲，公差敏感度增加，从而不易加工成型。在一些实施例中，光学***10所满足的该关系具体可以为-55、-50、-45、-36、-25、-20、-15或-12。在一些实施例中，第五透镜L5的像侧面S10于光轴101处的曲率半径R52满足-34.688mm≤R52≤-4.848mm，具体可以为-32、-30、-26、-20、-15、-12、-9，数值单位为mm。-60<R52/sd56<-10; R52 is the curvature radius of the image side S10 of the fifth lens L5 at the optical axis 101, sd56 is the maximum effective semi-aperture of the object side S11 of the sixth lens L6 and the image of the fifth lens L5 The difference between the maximum effective half-diameter of the side S10. When sd56 is greater than 0, it means that the maximum effective aperture of the object side S11 of the sixth lens L6 is larger than the maximum effective aperture of the image side S10 of the fifth lens L5. When this relationship is satisfied, on the one hand, it is beneficial to constrain the surface shape of the image side S10 of the fifth lens L5, so that the incident light can enter the sixth lens L6 with a smaller deflection angle when passing through the image side S10 of the fifth lens L5; On the one hand, it is also beneficial to realize a large image surface design while shortening the overall length of the optical system 10 . When it is lower than the lower limit of the relational expression, the image side surface of the fifth lens L5 is flat, which is not enough to deflect the edge light to a reasonable direction, so that the edge illuminance of the imaged image is easily reduced, and then vignetting occurs; when it is higher than the upper limit of the relational expression, the In turn, the image side surface S10 of the fifth lens L5 is too curved, and the tolerance sensitivity increases, making it difficult to process and shape. In some embodiments, the relationship satisfied by the optical system 10 may specifically be -55, -50, -45, -36, -25, -20, -15 or -12. In some embodiments, the radius of curvature R52 of the image side surface S10 of the fifth lens L5 at the optical axis 101 satisfies -34.688mm≤R52≤-4.848mm, and may specifically be -32, -30, -26, -20, - 15, -12, -9, the unit of value is mm.
0.9＜f/f1＜1.1；f为光学***10的有效焦距，f1为第一透镜L1的有效焦距。满足该关系时，将有利于第一透镜L1为整个光学***10贡献合适的正屈折力，以有效降低光学***10的头部尺寸，缩短***总长，为提高像面尺寸提供足够的空间。在一些实施例中，光学***10所满足的该关系具体可以为0.98、1、1.02、1.04或1.06。0.9<f/f1<1.1; f is the effective focal length of the optical system 10, and f1 is the effective focal length of the first lens L1. Satisfying this relationship will help the first lens L1 contribute a suitable positive refractive power to the entire optical system 10 , thereby effectively reducing the head size of the optical system 10 , shortening the overall length of the system, and providing sufficient space for increasing the image surface size. In some embodiments, the relationship satisfied by the optical system 10 may specifically be 0.98, 1, 1.02, 1.04 or 1.06.
对于上述sag72、sag81、sag82，应说明的是，当描述某一透镜表面于最大有效口径处的矢高时，即表示该透镜表面与光轴101的交点至该面最大有效口径位置于平行光轴101方向的距离。当最大有效口径处的矢高数值为负时，则表示该面最大有效口径位置相较该面与光轴101相交处更靠近物侧，反之则更靠近像侧。For the above sag72, sag81, and sag82, it should be noted that when describing the sag of a lens surface at the maximum effective aperture, it means that the intersection of the lens surface and the optical axis 101 to the position of the maximum effective aperture of the surface is parallel to the optical axis 101-direction distance. When the value of the sag at the maximum effective aperture is negative, it means that the position of the maximum effective aperture of the surface is closer to the object side than the intersection of the surface and the optical axis 101, and vice versa.
以上各关系式条件中的有效焦距、组合焦距的数值参考波长为555nm，有效焦距及组合焦距至少是指相应透镜或透镜组于近光轴处的数值。且以上各关系式条件及其所带来的技术效果针对的是具有上述透镜设计的光学***10。在无法确保拥有前述光学***10的透镜设计(透镜数量、屈折力配置、面型配置等)时，将难以确保光学***10在满足这些关系式时依然能够拥有相应的技术效果，甚至可能会导致摄像性能发生显著下降。The numerical reference wavelength of the effective focal length and combined focal length in the above relationship conditions is 555nm, and the effective focal length and combined focal length at least refer to the value of the corresponding lens or lens group at the near optical axis. And the above relational conditions and the technical effects brought about are aimed at the optical system 10 with the above-mentioned lens design. When the lens design (number of lenses, refractive power configuration, surface configuration, etc.) of the optical system 10 cannot be guaranteed, it will be difficult to ensure that the optical system 10 can still have corresponding technical effects when these relational expressions are satisfied, and may even lead to Camera performance is significantly degraded.
光学***10还包括孔径光阑STO，孔径光阑STO可用于限制到达成像面S17的入光量，同时也能用于阻挡非有效光线以改善像差，控制景深。在一些实施例中，孔径光阑STO设于第一透镜L1的物侧，例如搭接于第一透镜L1的物侧面S1上。当孔径光阑STO与第一透镜L1的物侧面S1在光轴101上的 透镜重叠时，也可称为孔径光阑STO位于第一透镜L1的物侧。The optical system 10 also includes an aperture stop STO. The aperture stop STO can be used to limit the amount of incident light reaching the imaging surface S17, and can also be used to block ineffective light rays to improve aberrations and control the depth of field. In some embodiments, the aperture stop STO is disposed on the object side of the first lens L1, for example, overlapped on the object side S1 of the first lens L1. When the aperture stop STO overlaps with a lens with the object side S1 of the first lens L1 on the optical axis 101, the aperture stop STO may also be referred to as being located on the object side of the first lens L1.
在一些实施例中，光学***10的至少一个透镜具有非球面面型，当透镜的至少一侧表面(物侧面或像侧面)为非球面时，即可称该透镜具有非球面面型。在一个实施例中，可以将各透镜的物侧面及像侧面均设计为非球面。非球面设计能够帮助光学***10更为有效地消除像差，改善成像品质。在一些实施例中，光学***10的至少一个透镜可具有球面面型，球面面型的设计可降低透镜的制备难度，降低制备成本。在一些实施例中，为了兼顾制备成本、制备难度、成像品质、组装难度等，光学***10中的各透镜表面的设计可由非球面及球面面型搭配而成。应注意的是，当某个透镜的物侧面或像侧面为非球面时，该面可以存在反曲结构，此时该面由中心至边缘的面型种类将发生改变，例如一个透镜表面在近光轴处为凸面，而在靠近最大有效口径处则为凹面。。In some embodiments, at least one lens of the optical system 10 has an aspherical surface. When at least one surface (object side or image side) of the lens is aspherical, the lens can be said to have an aspherical surface. In one embodiment, the object side surface and the image side surface of each lens can be designed as aspherical surfaces. The aspherical design can help the optical system 10 to more effectively eliminate aberrations and improve imaging quality. In some embodiments, at least one lens of the optical system 10 may have a spherical surface shape, and the design of the spherical surface shape can reduce the manufacturing difficulty and manufacturing cost of the lens. In some embodiments, in order to take into account manufacturing cost, manufacturing difficulty, imaging quality, assembly difficulty, etc., the design of each lens surface in the optical system 10 can be formed by a combination of aspherical and spherical surfaces. It should be noted that when the object side or image side of a lens is aspheric, the surface may have a recurve structure, and the surface type of the surface will change from the center to the edge. Convex at the optical axis and concave near the maximum effective aperture. .
非球面的面型计算可参考非球面公式：For the calculation of the surface shape of the aspheric surface, please refer to the aspheric surface formula:
Figure PCTCN2021090960-appb-000001
Figure PCTCN2021090960-appb-000001
其中，Z为非球面上相应点到该面于光轴101处的切平面的距离，r为非球面上相应点到光轴的距离，c为非球面于光轴101处的曲率，k为圆锥系数，Ai为非球面面型公式中与第i阶高次项相对应的高次项系数。Among them, Z is the distance from the corresponding point on the aspheric surface to the tangent plane of the surface at the optical axis 101, r is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric surface at the optical axis 101, and k is the Conic coefficient, Ai is the coefficient of the high-order term corresponding to the i-th-order high-order term in the aspheric surface formula.
另一方面，在一些实施例中，光学***10中至少一个透镜的材质为塑料(PC，Plastic)，塑料材质可以为聚碳酸酯、树胶等。在一些实施例中，光学***10中至少一个透镜的材质为玻璃(GL，Glass)。具有塑料材质的透镜能够降低光学***10的生产成本，而具有玻璃材质的透镜能够耐受较高或较低的温度且具有优良的光学效果及较佳的稳定性。在一些实施例中，光学***10中可设置不同材质的透镜，即可采用玻璃透镜及塑料透镜相结合的设计，但具体配置关系可根据实际需求而确定，此处不加以穷举。On the other hand, in some embodiments, the material of at least one lens in the optical system 10 is plastic (PC, Plastic), and the plastic material may be polycarbonate, gum, or the like. In some embodiments, the material of at least one lens in the optical system 10 is glass (GL, Glass). The lens with plastic material can reduce the production cost of the optical system 10 , while the lens with glass material can withstand higher or lower temperature and has excellent optical effect and better stability. In some embodiments, lenses of different materials may be provided in the optical system 10 , that is, a design combining glass lenses and plastic lenses may be used, but the specific configuration relationship can be determined according to actual requirements, which is not exhaustive here.
以下通过更具体的实施例以对本申请的光学***10进行说明：The optical system 10 of the present application will be described below through more specific embodiments:
第一实施例first embodiment
参考图1，在第一实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有负屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 1 , in the first embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凹面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凸面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凹面，像侧面S12于近最大有效口径处为凸面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is concave near the maximum effective aperture, and the image side S12 is convex near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凸面，像侧面S14于近最大有效口径处为凹面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凸面，像侧面S16于近最大有效口径处为凹面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is concave near the maximum effective aperture. .
在第一实施例中，第一透镜L1至第八透镜L8的各透镜表面均为非球面，且各透镜的材质均为塑料(PC)。In the first embodiment, each lens surface of the first lens L1 to the eighth lens L8 is aspherical, and the material of each lens is plastic (PC).
第一实施例中光学***10的各透镜参数由以下表1所展现。由光学***10的物侧至像侧的各元件依次按照表1从上至下的顺序排列，其中光阑表征孔径光阑STO。滤光片110为红外截止滤光片，滤光片110可作为光学***10的一部分，也可从光学***10中去除，但当去除滤光片110后，光学***10的光学总长保持不变。表1中Y半径为透镜相应表面于光轴101处的曲率半径。透镜于“厚度”参数列中的第一个数值的绝对值为该透镜于光轴101上的厚度(例如表1中面序号为S1的表面代表第一透镜的物侧面，面序号为S2的表面代表第一透镜的像侧面)，第二个数值的绝对值为该透镜的像侧面至后一光学面(后一透镜的物侧面或光阑面)于光轴101上的距离，其中光阑的厚度参数表示光阑面至像方相邻透镜的物侧面于光轴101上的距离。表格中各透镜的折射率、阿贝数的参考波长均为587.6nm，焦距(有效焦距)的参考波长为555nm，且Y半径、厚度、焦距(有效焦距)的数值单位均为毫米(mm)。另外，以下各实施例中用于关系式计算的参数数据和透镜面型结构以相应实施例中的透镜参数表格中的数据为准。The respective lens parameters of the optical system 10 in the first embodiment are shown in Table 1 below. The elements from the object side to the image side of the optical system 10 are sequentially arranged in the order from top to bottom in Table 1, wherein the stop represents the aperture stop STO. The filter 110 is an infrared cut-off filter. The filter 110 can be used as a part of the optical system 10 or can be removed from the optical system 10, but when the filter 110 is removed, the total optical length of the optical system 10 remains unchanged. . The Y radius in Table 1 is the curvature radius of the corresponding surface of the lens at the optical axis 101 . The absolute value of the first value of the lens in the "thickness" parameter column is the thickness of the lens on the optical axis 101 (for example, the surface number S1 in Table 1 represents the object side of the first lens, and the surface number S2 The surface represents the image side of the first lens), and the absolute value of the second value is the distance from the image side of the lens to the next optical surface (the object side or diaphragm surface of the latter lens) on the optical axis 101, where the light The thickness parameter of the diaphragm represents the distance on the optical axis 101 from the diaphragm surface to the object surface of the adjacent lens on the image side. The reference wavelength of refractive index and Abbe number of each lens in the table is 587.6nm, the reference wavelength of focal length (effective focal length) is 555nm, and the numerical units of Y radius, thickness, focal length (effective focal length) are all millimeters (mm) . In addition, the parameter data and the lens surface structure used for the calculation of the relational expressions in the following embodiments are subject to the data in the lens parameter table in the corresponding embodiments.
表1Table 1
Figure PCTCN2021090960-appb-000002
Figure PCTCN2021090960-appb-000002
由表1可知，第一实施例中的光学***10的有效焦距f为7.606mm，光圈数FNO为1.95，光学总长TTL为8.89mm，最大视场角FOV为87.668°，最大视场角FOV为semiFOV的两倍，可知该实施例光学***10拥有广角特性。It can be seen from Table 1 that the effective focal length f of the optical system 10 in the first embodiment is 7.606 mm, the aperture number FNO is 1.95, the total optical length TTL is 8.89 mm, the maximum field of view angle FOV is 87.668°, and the maximum field of view angle FOV is It can be seen that the optical system 10 of this embodiment has a wide-angle characteristic.
以下表2展现了表1中相应透镜表面的非球面系数，其中K为圆锥系数，Ai为非球面面型公式中与第i阶高次项相对应的系数。Table 2 below shows the aspheric coefficients of the corresponding lens surfaces in Table 1, where K is the conic coefficient and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface type formula.
表2Table 2
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 1.151E-021.151E-02 -5.708E-01-5.708E-01 -1.188E+00-1.188E+00 3.832E-013.832E-01 -1.000E+01-1.000E+01 3.776E-013.776E-01 1.000E+011.000E+01 5.474E+005.474E+00
A4A4 -8.785E-04-8.785E-04 -1.209E-02-1.209E-02 -2.413E-02-2.413E-02 -1.364E-02-1.364E-02 -3.689E-03-3.689E-03 3.449E-023.449E-02 1.972E-021.972E-02 -1.060E-02-1.060E-02
A6A6 3.843E-033.843E-03 3.121E-033.121E-03 7.045E-037.045E-03 2.759E-032.759E-03 -3.861E-03-3.861E-03 -7.820E-02-7.820E-02 -7.978E-02-7.978E-02 -1.573E-02-1.573E-02
A8A8 -6.290E-03-6.290E-03 7.082E-047.082E-04 4.793E-034.793E-03 1.075E-021.075E-02 3.129E-033.129E-03 7.984E-027.984E-02 8.010E-028.010E-02 9.060E-039.060E-03
A10A10 6.237E-036.237E-03 -1.788E-03-1.788E-03 -7.549E-03-7.549E-03 -1.511E-02-1.511E-02 -4.174E-03-4.174E-03 -5.329E-02-5.329E-02 -5.260E-02-5.260E-02 -1.842E-03-1.842E-03
A12A12 -3.838E-03-3.838E-03 1.433E-031.433E-03 5.911E-035.911E-03 1.234E-021.234E-02 3.272E-033.272E-03 2.294E-022.294E-02 2.387E-022.387E-02 -6.539E-04-6.539E-04
A14A14 1.474E-031.474E-03 -6.886E-04-6.886E-04 -2.925E-03-2.925E-03 -6.366E-03-6.366E-03 -1.531E-03-1.531E-03 -6.120E-03-6.120E-03 -7.388E-03-7.388E-03 5.310E-045.310E-04
A16A16 -3.449E-04-3.449E-04 1.976E-041.976E-04 8.924E-048.924E-04 2.022E-032.022E-03 3.816E-043.816E-04 8.748E-048.748E-04 1.457E-031.457E-03 -1.545E-04-1.545E-04
A18A18 4.495E-054.495E-05 -3.096E-05-3.096E-05 -1.510E-04-1.510E-04 -3.575E-04-3.575E-04 -3.801E-05-3.801E-05 -3.306E-05-3.306E-05 -1.592E-04-1.592E-04 2.202E-052.202E-05
A20A20 -2.512E-06-2.512E-06 2.021E-062.021E-06 1.079E-051.079E-05 2.705E-052.705E-05 0.000E+000.000E+00 -3.945E-06-3.945E-06 6.976E-066.976E-06 -1.222E-06-1.222E-06
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK -7.955E-01-7.955E-01 -4.247E+00-4.247E+00 6.636E-016.636E-01 -1.641E+01-1.641E+01 -1.044E+00-1.044E+00 3.649E-033.649E-03 3.220E-013.220E-01 -7.414E-01-7.414E-01
A4A4 -1.045E-02-1.045E-02 -1.998E-02-1.998E-02 -1.952E-02-1.952E-02 -1.227E-02-1.227E-02 7.911E-037.911E-03 7.930E-037.930E-03 -2.348E-02-2.348E-02 -2.767E-02-2.767E-02
A6A6 1.396E-031.396E-03 9.045E-039.045E-03 1.549E-021.549E-02 9.159E-039.159E-03 -6.962E-03-6.962E-03 -5.964E-03-5.964E-03 3.494E-033.494E-03 4.339E-034.339E-03
A8A8 -1.451E-03-1.451E-03 -5.476E-03-5.476E-03 -8.647E-03-8.647E-03 -5.881E-03-5.881E-03 6.271E-046.271E-04 8.012E-048.012E-04 -4.852E-04-4.852E-04 -6.491E-04-6.491E-04
A10A10 4.834E-044.834E-04 2.620E-032.620E-03 2.861E-032.861E-03 2.073E-032.073E-03 1.195E-041.195E-04 -2.423E-05-2.423E-05 5.891E-055.891E-05 6.486E-056.486E-05
A12A12 -9.823E-07-9.823E-07 -8.343E-04-8.343E-04 -5.926E-04-5.926E-04 -4.330E-04-4.330E-04 -3.940E-05-3.940E-05 -7.224E-06-7.224E-06 -4.579E-06-4.579E-06 -3.924E-06-3.924E-06
A14A14 -2.666E-05-2.666E-05 1.790E-041.790E-04 7.579E-057.579E-05 5.515E-055.515E-05 4.758E-064.758E-06 1.070E-061.070E-06 2.141E-072.141E-07 1.414E-071.414E-07
A16A16 1.913E-061.913E-06 -2.436E-05-2.436E-05 -5.811E-06-5.811E-06 -4.185E-06-4.185E-06 -2.962E-07-2.962E-07 -6.512E-08-6.512E-08 -5.888E-09-5.888E-09 -2.937E-09-2.937E-09
A18A18 7.172E-077.172E-07 1.862E-061.862E-06 2.509E-072.509E-07 1.736E-071.736E-07 9.431E-099.431E-09 1.906E-091.906E-09 8.807E-118.807E-11 3.193E-113.193E-11
A20A20 -8.618E-08-8.618E-08 -6.049E-08-6.049E-08 -4.895E-09-4.895E-09 -3.031E-09-3.031E-09 -1.218E-10-1.218E-10 -2.196E-11-2.196E-11 -5.538E-13-5.538E-13 -1.367E-13-1.367E-13
在第一实施例中，光学***10满足以下各关系：In the first embodiment, the optical system 10 satisfies the following relationships:
TTL/ImgH＝1.201；当具有八片式结构的光学***10满足上述关系式条件时，由于透镜数量、屈折力、面型和关系式上限的限制，光学***10将拥有大像面特性，可配合更高像素的图像传感器以拥有更为清晰的成像画面，另外也可防止八片式光学***10的轴向尺寸过长，进而可兼顾小型化设计。当上述光学***10满足关系式下限时，也可防止八片式光学***10的光学总长相对成像像高而言过短，使入射光线在经过各透镜时有足够的空间偏折以实现平缓过渡，降低成像清晰度对***光学总长的敏感度，从而保持成像质量的稳定，同时也有利于降低***的设计难度。TTL/ImgH=1.201; when the optical system 10 with an eight-piece structure satisfies the conditions of the above relational expression, due to the limitation of the number of lenses, refractive power, surface shape and the upper limit of the relational expression, the optical system 10 will have the characteristics of a large image surface, which can be In combination with an image sensor with a higher pixel, a clearer imaging picture can be obtained, and the axial dimension of the eight-piece optical system 10 can be prevented from being too long, so that the miniaturized design can be taken into account. When the above-mentioned optical system 10 satisfies the lower limit of the relational expression, it can also prevent the total optical length of the eight-piece optical system 10 from being too short relative to the imaging image height, so that the incident light has enough spatial deflection when passing through each lens to achieve a smooth transition , reducing the sensitivity of imaging sharpness to the total optical length of the system, thereby maintaining the stability of imaging quality, and also helping to reduce the difficulty of system design.
f2/f12＝-2.397；满足该关系时，第一透镜L1和第二透镜L2的屈折力配置合理，具有负屈折力的第二透镜L2可以有效矫正第一透镜L1产生的畸变、场曲等像差，减小入射光线在经过第一透镜L1和第二透镜L2时的偏转角度，从而有利于降低光学***10的总体敏感度，提高整体成像质量。f2/f12=-2.397; when this relationship is satisfied, the refractive powers of the first lens L1 and the second lens L2 are reasonably configured, and the second lens L2 with negative refractive power can effectively correct the distortion and field curvature generated by the first lens L1 Aberration, reducing the deflection angle of the incident light when passing through the first lens L1 and the second lens L2, thereby helping to reduce the overall sensitivity of the optical system 10 and improve the overall imaging quality.
f/tan(semiFOV)＝7.92mm；满足该关系时，上述光学***10的视场角和像高能够得到合理配置，一方面能够减小光线在光学***10中的偏折角度，从而较好的平衡光学***10的像差；一方面可进一步压缩光学***10的轴向尺寸；另一方面还能够使光学***10进一步实现大像面设计；此外还有利于降低各透镜注塑加工难度。f/tan(semiFOV)=7.92mm; when this relationship is satisfied, the field of view and image height of the optical system 10 can be reasonably configured, on the one hand, the deflection angle of the light in the optical system 10 can be reduced, so that the On the one hand, the axial dimension of the optical system 10 can be further compressed; on the other hand, the optical system 10 can further realize the design of a large image plane; in addition, it is beneficial to reduce the difficulty of injection molding of each lens.
sd81/sd31＝3.24；满足该关系时，第八透镜L8的孔径相较第三透镜L3的有效口径而言保持在较大但不会引起入射光线过度偏折的范围内，从而有利于使光学***10获得更大尺寸的像面，以匹配更高像素的图像传感器，进而提高解析力。sd81/sd31=3.24; when this relationship is satisfied, the aperture of the eighth lens L8 is kept larger than the effective aperture of the third lens L3 but does not cause excessive deflection of the incident light, which is conducive to making the optical The system 10 obtains a larger image surface to match the image sensor with higher pixels, thereby improving the resolution.
f8/sag82＝3.59；满足该关系时，有利于第八透镜L8为八片式光学***10贡献合理的负屈折力，以矫正物方透镜产生的像差，同时有利于缩短***总长。f8/sag82=3.59; when this relationship is satisfied, it is beneficial for the eighth lens L8 to contribute a reasonable negative refractive power to the eight-piece optical system 10 to correct the aberration generated by the object lens, and at the same time, it is beneficial to shorten the total length of the system.
R71/sd67＝9.81；最大有效半口径的数值为最大有效口径的一半。满足该关系时，可合理约束第七透镜L7的面型以及第六透镜L6与第七透镜L7之间的口径差异，从而能够在保持入射光线偏转角较小 的同时提高段差，进而有助于光学***10实现大像面设计，另外也有助于缩短光学***10的总长，以实现光学***10的小型化设计。R71/sd67=9.81; the value of the maximum effective half diameter is half of the maximum effective diameter. When this relationship is satisfied, the surface shape of the seventh lens L7 and the aperture difference between the sixth lens L6 and the seventh lens L7 can be reasonably constrained, so that the level difference can be improved while the deflection angle of the incident light is kept small, thereby contributing to the The optical system 10 realizes a large image plane design, and also helps to shorten the overall length of the optical system 10 , so as to realize the miniaturized design of the optical system 10 .
sag81/sag72＝1.73；满足该关系时，可合理约束第七透镜L7的像侧面S14和第八透镜L8的物侧面S15的面型，以达到有效矫正***像差的效果，提高成像质量，同时促使相应透镜面型于最大有效口径处的矢高不会过大，面型不会过于扭曲，进而使透镜面型被控制在易于加工成型的范围之内。sag81/sag72=1.73; when this relationship is satisfied, the surface shape of the image side S14 of the seventh lens L7 and the object side S15 of the eighth lens L8 can be reasonably constrained, so as to effectively correct the system aberration and improve the image quality. The sag height of the corresponding lens surface shape at the maximum effective aperture will not be too large, and the surface shape will not be too distorted, so that the lens surface shape can be controlled within a range that is easy to process and shape.
R52/sd56＝-19.39；满足该关系时，一方面有利于约束第五透镜L5的像侧面S10面型，促使入射光线在经过第五透镜L5的像侧面S10时能够以较小的偏转角射入第六透镜L6；另一方面也有利于在缩短光学***10总长的同时实现大像面设计。R52/sd56=-19.39; when this relationship is satisfied, on the one hand, it is beneficial to constrain the surface shape of the image side S10 of the fifth lens L5, so that the incident light can be incident at a smaller deflection angle when passing through the image side S10 of the fifth lens L5 into the sixth lens L6; on the other hand, it is also beneficial to realize a large image surface design while shortening the overall length of the optical system 10.
f/f1＝1.04；满足该关系时，将有利于第一透镜L1为整个光学***10贡献合适的正屈折力，以有效降低光学***10的头部尺寸，缩短***总长，为提高像面尺寸提供足够的空间。f/f1=1.04; when this relationship is satisfied, it will be beneficial for the first lens L1 to contribute a suitable positive refractive power to the entire optical system 10, so as to effectively reduce the head size of the optical system 10, shorten the overall length of the system, and increase the size of the image surface. Provide enough space.
图2包括了第一实施例中光学***10的纵向球差图、像散图和畸变图。像散图和畸变图的参考波长为555nm，且两者的纵坐标表示像高IMG HT，单位为mm。纵向球面像差图(Longitudinal Spherical Aberration)展现了不同波长的光线经由镜头后的汇聚焦点偏离。纵向球面像差图的纵坐标表示归一化的由光瞳中心至光瞳边缘的光瞳坐标(Normalized Pupil Coordinator)，横坐标表示成像面到光线与光轴交点的距离(单位为mm)。由纵向球面像差图可知，第一实施例中的各波长光线的汇聚焦点偏离程度趋于一致，各参考波长的最大焦点偏移均被控制在±0.05mm以内，成像画面中的弥散斑或色晕得到有效抑制。图2还包括光学***10的场曲像散图(Astigmatic Field Curves)，其中S曲线代表555nm下的弧矢场曲，T曲线代表555nm下的子午场曲。由图中可知，光学***的场曲较小，最大场曲被控制在±0.025mm以内，像面弯曲程度得到有效抑制，且各视场下的弧矢场曲及子午场曲趋于一致，各视场的像散得到较佳的控制，因此可知光学***10的视场中心至边缘均拥有清晰的成像。另外根据畸变图可知，光学***10的最大畸变被控制在2.5％以内，从而可知畸变程度得到了优良的控制。FIG. 2 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the first embodiment. The reference wavelength of the astigmatism map and the distortion map is 555nm, and the ordinates of the two represent the image height IMG HT in mm. Longitudinal Spherical Aberration (Longitudinal Spherical Aberration) shows the deviation of the convergence focus of light of different wavelengths after passing through the lens. The ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane to the intersection of the light and the optical axis (unit is mm). It can be seen from the longitudinal spherical aberration diagram that in the first embodiment, the degree of deviation of the convergence focus of each wavelength of light tends to be consistent, and the maximum focus deviation of each reference wavelength is controlled within ±0.05mm. Color halo is effectively suppressed. FIG. 2 also includes a field curvature astigmatism diagram (Astigmatic Field Curves) of the optical system 10, wherein the S curve represents the sagittal field curvature at 555 nm, and the T curve represents the meridional field curvature at 555 nm. It can be seen from the figure that the field curvature of the optical system is small, the maximum field curvature is controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, and the sagittal field curvature and meridional field curvature in each field of view tend to be consistent. The astigmatism of each field of view is better controlled, so it can be seen that the optical system 10 has a clear image from the center to the edge of the field of view. In addition, according to the distortion diagram, it can be seen that the maximum distortion of the optical system 10 is controlled within 2.5%, so that the degree of distortion is well controlled.
第二实施例Second Embodiment
参考图3，在第二实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有正屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 3 , in the second embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凹面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凸面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凸面，像侧面S14于近最大有效口径处为凹面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凸面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凸面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is convex at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表3和表4给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The lens parameters of the optical system 10 in this embodiment are given in Table 3 and Table 4, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表3table 3
Figure PCTCN2021090960-appb-000003
Figure PCTCN2021090960-appb-000003
表4Table 4
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK -4.147E-04-4.147E-04 -2.066E+00-2.066E+00 -1.396E+00-1.396E+00 6.456E-016.456E-01 -1.000E+01-1.000E+01 7.309E+007.309E+00 -1.000E+01-1.000E+01 9.369E+009.369E+00
A4A4 1.527E-051.527E-05 -1.053E-02-1.053E-02 -2.204E-02-2.204E-02 -1.247E-02-1.247E-02 2.721E-042.721E-04 2.350E-022.350E-02 1.557E-021.557E-02 -2.655E-05-2.655E-05
A6A6 1.904E-031.904E-03 2.458E-032.458E-03 5.112E-035.112E-03 3.242E-033.242E-03 -7.092E-03-7.092E-03 -5.734E-02-5.734E-02 -7.005E-02-7.005E-02 -2.876E-02-2.876E-02
A8A8 -3.286E-03-3.286E-03 -5.813E-04-5.813E-04 3.406E-033.406E-03 5.054E-035.054E-03 7.315E-037.315E-03 5.995E-025.995E-02 6.932E-026.932E-02 2.085E-022.085E-02
A10A10 3.539E-033.539E-03 2.331E-042.331E-04 -4.296E-03-4.296E-03 -5.901E-03-5.901E-03 -8.029E-03-8.029E-03 -4.342E-02-4.342E-02 -4.693E-02-4.693E-02 -9.225E-03-9.225E-03
A12A12 -2.368E-03-2.368E-03 -1.057E-04-1.057E-04 3.271E-033.271E-03 4.442E-034.442E-03 5.461E-035.461E-03 2.079E-022.079E-02 2.189E-022.189E-02 2.335E-032.335E-03
A14A14 9.838E-049.838E-04 1.347E-051.347E-05 -1.702E-03-1.702E-03 -2.237E-03-2.237E-03 -2.281E-03-2.281E-03 -6.379E-03-6.379E-03 -6.822E-03-6.822E-03 -2.212E-04-2.212E-04
A16A16 -2.492E-04-2.492E-04 4.156E-064.156E-06 5.607E-045.607E-04 7.172E-047.172E-04 5.283E-045.283E-04 1.165E-031.165E-03 1.348E-031.348E-03 -4.164E-05-4.164E-05
A18A18 3.516E-053.516E-05 -1.408E-06-1.408E-06 -1.027E-04-1.027E-04 -1.284E-04-1.284E-04 -5.108E-05-5.108E-05 -1.036E-04-1.036E-04 -1.498E-04-1.498E-04 1.279E-051.279E-05
A20A20 -2.143E-06-2.143E-06 8.840E-088.840E-08 7.916E-067.916E-06 9.837E-069.837E-06 0.000E+000.000E+00 2.084E-062.084E-06 6.927E-066.927E-06 -9.072E-07-9.072E-07
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK -2.440E+00-2.440E+00 5.190E+005.190E+00 1.000E+011.000E+01 -2.464E+01-2.464E+01 -1.061E+00-1.061E+00 -1.864E-02-1.864E-02 -9.974E+00-9.974E+00 -8.409E-01-8.409E-01
A4A4 -9.240E-03-9.240E-03 -2.165E-02-2.165E-02 -1.923E-02-1.923E-02 -1.596E-02-1.596E-02 5.133E-035.133E-03 1.758E-021.758E-02 -2.425E-02-2.425E-02 -3.262E-02-3.262E-02
A6A6 -2.269E-03-2.269E-03 8.592E-038.592E-03 1.360E-021.360E-02 1.217E-021.217E-02 -4.680E-03-4.680E-03 -1.004E-02-1.004E-02 2.661E-032.661E-03 5.204E-035.204E-03
A8A8 2.271E-042.271E-04 -5.737E-03-5.737E-03 -6.948E-03-6.948E-03 -6.300E-03-6.300E-03 -3.822E-04-3.822E-04 1.773E-031.773E-03 -2.720E-04-2.720E-04 -8.116E-04-8.116E-04
A10A10 1.864E-031.864E-03 3.439E-033.439E-03 2.139E-032.139E-03 1.961E-031.961E-03 3.464E-043.464E-04 -1.773E-04-1.773E-04 3.313E-053.313E-05 8.611E-058.611E-05
A12A12 -1.609E-03-1.609E-03 -1.335E-03-1.335E-03 -4.206E-04-4.206E-04 -3.837E-04-3.837E-04 -6.983E-05-6.983E-05 9.173E-069.173E-06 -2.767E-06-2.767E-06 -5.627E-06-5.627E-06
A14A14 6.503E-046.503E-04 3.219E-043.219E-04 5.062E-055.062E-05 4.685E-054.685E-05 7.333E-067.333E-06 -8.608E-08-8.608E-08 1.360E-071.360E-07 2.241E-072.241E-07
A16A16 -1.484E-04-1.484E-04 -4.575E-05-4.575E-05 -3.502E-06-3.502E-06 -3.431E-06-3.431E-06 -4.309E-07-4.309E-07 -1.454E-08-1.454E-08 -3.849E-09-3.849E-09 -5.312E-09-5.312E-09
A18A18 1.840E-051.840E-05 3.485E-063.485E-06 1.254E-071.254E-07 1.374E-071.374E-07 1.339E-081.339E-08 6.694E-106.694E-10 5.848E-115.848E-11 6.894E-116.894E-11
A20A20 -9.583E-07-9.583E-07 -1.096E-07-1.096E-07 -1.754E-09-1.754E-09 -2.310E-09-2.310E-09 -1.714E-10-1.714E-10 -9.109E-12-9.109E-12 -3.708E-13-3.708E-13 -3.778E-13-3.778E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2011.201 R71/sd67R71/sd67 11.15411.154
f2/f12f2/f12 -2.411-2.411 sag81/sag72sag81/sag72 1.5581.558
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.7847.784 R52/sd56R52/sd56 -21.301-21.301
sd81/sd31sd81/sd31 3.2743.274 f/f1f/f1 1.0021.002
f8/sag82f8/sag82 4.8514.851      
由图4中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中各参考波长下的焦点偏移均被控制在±0.05mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 4 that the longitudinal spherical aberration, field curvature, astigmatism and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.05mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
第三实施例Third Embodiment
参考图5，在第三实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6、具有正屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 5 , in the third embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凹面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凹面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is concave near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凹面，像侧面S14于近最大有效口径处为凸面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凸面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表5和表6给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The parameters of each lens of the optical system 10 in this embodiment are given in Table 5 and Table 6, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表5table 5
Figure PCTCN2021090960-appb-000004
Figure PCTCN2021090960-appb-000004
Figure PCTCN2021090960-appb-000005
Figure PCTCN2021090960-appb-000005
表6Table 6
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 3.879E-023.879E-02 -5.340E-01-5.340E-01 -1.514E+00-1.514E+00 3.550E-013.550E-01 1.000E+011.000E+01 -6.601E-01-6.601E-01 6.160E+006.160E+00 -7.466E+00-7.466E+00
A4A4 -6.215E-04-6.215E-04 -1.090E-02-1.090E-02 -2.189E-02-2.189E-02 -1.213E-02-1.213E-02 -5.426E-03-5.426E-03 3.585E-023.585E-02 1.613E-021.613E-02 -1.792E-02-1.792E-02
A6A6 3.359E-033.359E-03 1.488E-031.488E-03 5.391E-035.391E-03 2.767E-032.767E-03 -1.334E-03-1.334E-03 -7.167E-02-7.167E-02 -6.709E-02-6.709E-02 -3.088E-03-3.088E-03
A8A8 -5.406E-03-5.406E-03 2.723E-032.723E-03 4.286E-034.286E-03 6.039E-036.039E-03 -2.034E-03-2.034E-03 6.030E-026.030E-02 5.746E-025.746E-02 -2.442E-03-2.442E-03
A10A10 5.372E-035.372E-03 -3.703E-03-3.703E-03 -5.656E-03-5.656E-03 -6.658E-03-6.658E-03 2.041E-032.041E-03 -2.950E-02-2.950E-02 -2.838E-02-2.838E-02 5.440E-035.440E-03
A12A12 -3.319E-03-3.319E-03 2.637E-032.637E-03 3.978E-033.978E-03 4.217E-034.217E-03 -1.153E-03-1.153E-03 6.159E-036.159E-03 7.173E-037.173E-03 -3.918E-03-3.918E-03
A14A14 1.285E-031.285E-03 -1.165E-03-1.165E-03 -1.809E-03-1.809E-03 -1.676E-03-1.676E-03 3.328E-043.328E-04 1.221E-031.221E-03 3.067E-063.067E-06 1.514E-031.514E-03
A16A16 -3.044E-04-3.044E-04 3.103E-043.103E-04 5.145E-045.145E-04 4.104E-044.104E-04 -4.246E-05-4.246E-05 -1.063E-03-1.063E-03 -5.410E-04-5.410E-04 -3.379E-04-3.379E-04
A18A18 4.027E-054.027E-05 -4.540E-05-4.540E-05 -8.155E-05-8.155E-05 -5.492E-05-5.492E-05 1.938E-061.938E-06 2.461E-042.461E-04 1.382E-041.382E-04 4.079E-054.079E-05
A20A20 -2.298E-06-2.298E-06 2.780E-062.780E-06 5.453E-065.453E-06 3.213E-063.213E-06 0.000E+000.000E+00 -2.061E-05-2.061E-05 -1.155E-05-1.155E-05 -2.018E-06-2.018E-06
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK -5.036E+00-5.036E+00 -4.759E+00-4.759E+00 -5.777E+00-5.777E+00 -1.995E+01-1.995E+01 -1.368E+00-1.368E+00 1.774E-021.774E-02 1.255E+001.255E+00 -7.513E-01-7.513E-01
A4A4 -1.049E-02-1.049E-02 -2.004E-02-2.004E-02 -2.259E-02-2.259E-02 -1.170E-02-1.170E-02 7.825E-037.825E-03 1.264E-021.264E-02 -2.398E-02-2.398E-02 -2.913E-02-2.913E-02
A6A6 4.063E-034.063E-03 6.484E-036.484E-03 1.746E-021.746E-02 7.777E-037.777E-03 -8.189E-03-8.189E-03 -7.900E-03-7.900E-03 3.607E-033.607E-03 4.516E-034.516E-03
A8A8 -4.084E-03-4.084E-03 -1.319E-03-1.319E-03 -7.909E-03-7.909E-03 -3.888E-03-3.888E-03 1.398E-031.398E-03 1.308E-031.308E-03 -5.019E-04-5.019E-04 -6.510E-04-6.510E-04
A10A10 2.431E-032.431E-03 -4.188E-04-4.188E-04 1.907E-031.907E-03 1.055E-031.055E-03 -1.064E-04-1.064E-04 -1.115E-04-1.115E-04 6.101E-056.101E-05 6.442E-056.442E-05
A12A12 -1.046E-03-1.046E-03 4.369E-044.369E-04 -2.397E-04-2.397E-04 -1.724E-04-1.724E-04 -2.856E-06-2.856E-06 2.428E-062.428E-06 -4.764E-06-4.764E-06 -3.947E-06-3.947E-06
A14A14 3.357E-043.357E-04 -1.405E-04-1.405E-04 8.832E-068.832E-06 1.768E-051.768E-05 1.303E-061.303E-06 3.968E-073.968E-07 2.241E-072.241E-07 1.464E-071.464E-07
A16A16 -7.485E-05-7.485E-05 2.312E-052.312E-05 1.306E-061.306E-06 -1.108E-06-1.108E-06 -1.058E-07-1.058E-07 -3.659E-08-3.659E-08 -6.204E-09-6.204E-09 -3.188E-09-3.188E-09
A18A18 9.770E-069.770E-06 -1.966E-06-1.966E-06 -1.547E-07-1.547E-07 3.855E-083.855E-08 3.750E-093.750E-09 1.236E-091.236E-09 9.346E-119.346E-11 3.730E-113.730E-11
A20A20 -5.396E-07-5.396E-07 6.825E-086.825E-08 4.835E-094.835E-09 -5.690E-10-5.690E-10 -5.079E-11-5.079E-11 -1.528E-11-1.528E-11 -5.921E-13-5.921E-13 -1.799E-13-1.799E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2091.209 R71/sd67R71/sd67 10.35710.357
f2/f12f2/f12 -2.827-2.827 sag81/sag72sag81/sag72 1.7071.707
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.8237.823 R52/sd56R52/sd56 -10.189-10.189
sd81/sd31sd81/sd31 3.2533.253 f/f1f/f1 1.0191.019
f8/sag82f8/sag82 3.8113.811      
由图6中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中各参考波长下的焦点偏移均被控制在±0.05mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 6 that the longitudinal spherical aberration, field curvature, astigmatism and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.05mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
第四实施例Fourth Embodiment
参考图7，在第四实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有负屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 7 , in the fourth embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凹面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凹面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is concave near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凸面，像侧面S14于近最大有效口径处为凹面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the maximum effective aperture, and the image side S14 is concave near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凸面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is convex near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表7和表8给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The parameters of each lens of the optical system 10 in this embodiment are given in Table 7 and Table 8, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表7Table 7
Figure PCTCN2021090960-appb-000006
Figure PCTCN2021090960-appb-000006
Figure PCTCN2021090960-appb-000007
Figure PCTCN2021090960-appb-000007
表8Table 8
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 1.135E-021.135E-02 -8.282E-01-8.282E-01 -1.479E+00-1.479E+00 5.566E-015.566E-01 -9.988E+00-9.988E+00 1.000E+011.000E+01 -9.998E+00-9.998E+00 9.997E+009.997E+00
A4A4 -1.261E-05-1.261E-05 -9.447E-03-9.447E-03 -2.056E-02-2.056E-02 -1.111E-02-1.111E-02 1.608E-031.608E-03 6.981E-036.981E-03 -3.686E-03-3.686E-03 -7.978E-03-7.978E-03
A6A6 1.860E-031.860E-03 1.475E-031.475E-03 6.090E-036.090E-03 3.985E-033.985E-03 -5.197E-03-5.197E-03 -4.190E-02-4.190E-02 -3.507E-02-3.507E-02 -7.515E-03-7.515E-03
A8A8 -2.876E-03-2.876E-03 8.796E-048.796E-04 -4.401E-05-4.401E-05 2.409E-032.409E-03 4.866E-034.866E-03 4.945E-024.945E-02 3.530E-023.530E-02 1.481E-031.481E-03
A10A10 2.752E-032.752E-03 -1.405E-03-1.405E-03 -2.738E-04-2.738E-04 -3.176E-03-3.176E-03 -5.708E-03-5.708E-03 -3.807E-02-3.807E-02 -2.421E-02-2.421E-02 7.478E-047.478E-04
A12A12 -1.643E-03-1.643E-03 1.027E-031.027E-03 2.237E-042.237E-04 2.518E-032.518E-03 4.058E-034.058E-03 1.917E-021.917E-02 1.123E-021.123E-02 -7.653E-04-7.653E-04
A14A14 6.121E-046.121E-04 -4.726E-04-4.726E-04 -1.992E-04-1.992E-04 -1.318E-03-1.318E-03 -1.720E-03-1.720E-03 -6.201E-03-6.201E-03 -3.364E-03-3.364E-03 3.380E-043.380E-04
A16A16 -1.399E-04-1.399E-04 1.309E-041.309E-04 9.955E-059.955E-05 4.352E-044.352E-04 3.961E-043.961E-04 1.211E-031.211E-03 5.998E-045.998E-04 -8.814E-05-8.814E-05
A18A18 1.787E-051.787E-05 -1.986E-05-1.986E-05 -2.299E-05-2.299E-05 -7.890E-05-7.890E-05 -3.754E-05-3.754E-05 -1.230E-04-1.230E-04 -5.359E-05-5.359E-05 1.218E-051.218E-05
A20A20 -9.942E-07-9.942E-07 1.256E-061.256E-06 2.011E-062.011E-06 6.099E-066.099E-06 0.000E+000.000E+00 4.307E-064.307E-06 1.487E-061.487E-06 -6.379E-07-6.379E-07
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK -1.103E+00-1.103E+00 -8.537E-01-8.537E-01 2.318E+002.318E+00 -1.142E+01-1.142E+01 -1.071E+00-1.071E+00 7.008E-057.008E-05 2.915E-012.915E-01 -7.589E-01-7.589E-01
A4A4 -1.419E-02-1.419E-02 -1.872E-02-1.872E-02 -1.296E-02-1.296E-02 -9.432E-03-9.432E-03 5.732E-035.732E-03 9.189E-039.189E-03 -2.468E-02-2.468E-02 -3.003E-02-3.003E-02
A6A6 2.727E-032.727E-03 7.527E-037.527E-03 1.052E-021.052E-02 5.791E-035.791E-03 -5.637E-03-5.637E-03 -6.424E-03-6.424E-03 3.699E-033.699E-03 4.829E-034.829E-03
A8A8 -2.535E-03-2.535E-03 -4.133E-03-4.133E-03 -5.552E-03-5.552E-03 -3.214E-03-3.214E-03 2.125E-042.125E-04 9.249E-049.249E-04 -5.033E-04-5.033E-04 -7.234E-04-7.234E-04
A10A10 1.687E-031.687E-03 1.711E-031.711E-03 1.573E-031.573E-03 9.122E-049.122E-04 1.673E-041.673E-04 -5.168E-05-5.168E-05 6.009E-056.009E-05 7.292E-057.292E-05
A12A12 -7.295E-04-7.295E-04 -3.828E-04-3.828E-04 -2.682E-04-2.682E-04 -1.549E-04-1.549E-04 -3.939E-05-3.939E-05 -3.012E-06-3.012E-06 -4.648E-06-4.648E-06 -4.523E-06-4.523E-06
A14A14 2.602E-042.602E-04 4.132E-054.132E-05 2.721E-052.721E-05 1.667E-051.667E-05 4.293E-064.293E-06 6.750E-076.750E-07 2.174E-072.174E-07 1.707E-071.707E-07
A16A16 -6.891E-05-6.891E-05 -8.195E-07-8.195E-07 -1.528E-06-1.528E-06 -1.106E-06-1.106E-06 -2.544E-07-2.544E-07 -4.383E-08-4.383E-08 -5.996E-09-5.996E-09 -3.830E-09-3.830E-09
A18A18 1.022E-051.022E-05 -2.134E-07-2.134E-07 4.034E-084.034E-08 4.093E-084.093E-08 7.876E-097.876E-09 1.299E-091.299E-09 9.013E-119.013E-11 4.702E-114.702E-11
A20A20 -6.041E-07-6.041E-07 1.324E-081.324E-08 -2.939E-10-2.939E-10 -6.416E-10-6.416E-10 -9.989E-11-9.989E-11 -1.490E-11-1.490E-11 -5.709E-13-5.709E-13 -2.444E-13-2.444E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2131.213 R71/sd67R71/sd67 15.40315.403
f2/f12f2/f12 -2.228-2.228 sag81/sag72sag81/sag72 1.7481.748
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.9227.922 R52/sd56R52/sd56 -18.648-18.648
sd81/sd31sd81/sd31 3.1993.199 f/f1f/f1 1.0551.055
f8/sag82f8/sag82 3.4373.437      
由图8中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中 各参考波长下的焦点偏移均被控制在±0.1mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 8 that the longitudinal spherical aberration, field curvature, astigmatism and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.1mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
第五实施例Fifth Embodiment
参考图9，在第五实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有负屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 9 , in the fifth embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with negative refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with negative refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凹面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凸面，像侧面S10于近最大有效口径处为凸面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is convex near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凹面，像侧面S14于近最大有效口径处为凸面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凹面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表9和表10给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The parameters of each lens of the optical system 10 in this embodiment are given in Table 9 and Table 10, wherein the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表9Table 9
Figure PCTCN2021090960-appb-000008
Figure PCTCN2021090960-appb-000008
Figure PCTCN2021090960-appb-000009
Figure PCTCN2021090960-appb-000009
表10Table 10
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 1.440E-021.440E-02 -2.541E-01-2.541E-01 9.933E-019.933E-01 1.176E+001.176E+00 7.711E+007.711E+00 1.000E+011.000E+01 -1.000E+01-1.000E+01 9.476E+009.476E+00
A4A4 5.775E-055.775E-05 -9.497E-03-9.497E-03 -2.048E-02-2.048E-02 -1.123E-02-1.123E-02 2.345E-032.345E-03 -2.531E-02-2.531E-02 -3.068E-02-3.068E-02 -1.100E-02-1.100E-02
A6A6 1.749E-031.749E-03 1.558E-031.558E-03 6.121E-036.121E-03 4.917E-034.917E-03 -5.088E-03-5.088E-03 7.462E-037.462E-03 4.137E-034.137E-03 -4.467E-03-4.467E-03
A8A8 -2.773E-03-2.773E-03 1.164E-031.164E-03 1.053E-031.053E-03 1.390E-031.390E-03 5.139E-035.139E-03 -2.269E-03-2.269E-03 -2.708E-03-2.708E-03 5.881E-045.881E-04
A10A10 2.716E-032.716E-03 -1.915E-03-1.915E-03 -1.603E-03-1.603E-03 -1.497E-03-1.497E-03 -5.540E-03-5.540E-03 4.115E-044.115E-04 1.792E-031.792E-03 2.106E-042.106E-04
A12A12 -1.649E-03-1.649E-03 1.455E-031.455E-03 9.663E-049.663E-04 7.904E-047.904E-04 3.703E-033.703E-03 -6.942E-04-6.942E-04 -1.470E-03-1.470E-03 -1.913E-04-1.913E-04
A14A14 6.225E-046.225E-04 -6.812E-04-6.812E-04 -4.150E-04-4.150E-04 -3.033E-04-3.033E-04 -1.502E-03-1.502E-03 7.325E-047.325E-04 9.545E-049.545E-04 1.004E-041.004E-04
A16A16 -1.436E-04-1.436E-04 1.907E-041.907E-04 1.260E-041.260E-04 9.630E-059.630E-05 3.343E-043.343E-04 -3.549E-04-3.549E-04 -3.777E-04-3.777E-04 -3.386E-05-3.386E-05
A18A18 1.850E-051.850E-05 -2.917E-05-2.917E-05 -2.228E-05-2.228E-05 -1.899E-05-1.899E-05 -3.085E-05-3.085E-05 8.386E-058.386E-05 7.902E-057.902E-05 5.554E-065.554E-06
A20A20 -1.036E-06-1.036E-06 1.865E-061.865E-06 1.679E-061.679E-06 1.772E-061.772E-06 0.000E+000.000E+00 -7.791E-06-7.791E-06 -6.613E-06-6.613E-06 -3.044E-07-3.044E-07
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK 5.032E+005.032E+00 5.513E+005.513E+00 -8.666E+00-8.666E+00 -1.058E+01-1.058E+01 -1.165E+00-1.165E+00 -1.954E-02-1.954E-02 -6.822E-02-6.822E-02 -7.690E-01-7.690E-01
A4A4 -1.761E-02-1.761E-02 -1.945E-02-1.945E-02 -1.081E-02-1.081E-02 -9.706E-03-9.706E-03 8.597E-038.597E-03 1.269E-021.269E-02 -2.305E-02-2.305E-02 -2.826E-02-2.826E-02
A6A6 2.969E-032.969E-03 6.029E-036.029E-03 7.582E-037.582E-03 3.974E-033.974E-03 -6.904E-03-6.904E-03 -7.606E-03-7.606E-03 2.835E-032.835E-03 4.192E-034.192E-03
A8A8 3.331E-043.331E-04 -2.004E-03-2.004E-03 -3.316E-03-3.316E-03 -1.664E-03-1.664E-03 8.298E-048.298E-04 1.213E-031.213E-03 -2.650E-04-2.650E-04 -5.985E-04-5.985E-04
A10A10 -1.317E-03-1.317E-03 3.855E-043.855E-04 7.151E-047.151E-04 3.517E-043.517E-04 -2.012E-05-2.012E-05 -1.041E-04-1.041E-04 2.541E-052.541E-05 5.891E-055.891E-05
A12A12 8.492E-048.492E-04 4.868E-054.868E-05 -8.284E-05-8.284E-05 -4.385E-05-4.385E-05 -6.316E-06-6.316E-06 3.660E-063.660E-06 -1.804E-06-1.804E-06 -3.582E-06-3.582E-06
A14A14 -2.528E-04-2.528E-04 -3.757E-05-3.757E-05 3.889E-063.889E-06 3.711E-063.711E-06 8.925E-078.925E-07 1.265E-071.265E-07 8.006E-088.006E-08 1.323E-071.323E-07
A16A16 3.700E-053.700E-05 7.107E-067.107E-06 1.531E-071.531E-07 -2.160E-07-2.160E-07 -5.436E-08-5.436E-08 -1.681E-08-1.681E-08 -2.102E-09-2.102E-09 -2.890E-09-2.890E-09
A18A18 -2.521E-06-2.521E-06 -6.032E-07-6.032E-07 -2.366E-08-2.366E-08 7.633E-097.633E-09 1.629E-091.629E-09 5.828E-105.828E-10 3.003E-113.003E-11 3.440E-113.440E-11
A20A20 6.482E-086.482E-08 1.977E-081.977E-08 6.962E-106.962E-10 -1.186E-10-1.186E-10 -1.953E-11-1.953E-11 -7.084E-12-7.084E-12 -1.803E-13-1.803E-13 -1.722E-13-1.722E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2141.214 R71/sd67R71/sd67 9.2759.275
f2/f12f2/f12 -2.141-2.141 sag81/sag72sag81/sag72 1.5811.581
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.9177.917 R52/sd56R52/sd56 -39.256-39.256
sd81/sd31sd81/sd31 3.3403.340 f/f1f/f1 1.0711.071
f8/sag82f8/sag82 3.4993.499      
由图10中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中各参考波长下的焦点偏移均被控制在±0.1mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 10 that the longitudinal spherical aberration, field curvature, astigmatism, and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.1mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
第六实施例Sixth Embodiment
参考图11，在第六实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的 第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有正屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 11 , in the sixth embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凹面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is concave near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凸面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is convex near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凸面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凹面，像侧面S14于近最大有效口径处为凸面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凹面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表11和表12给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The parameters of each lens of the optical system 10 in this embodiment are given in Table 11 and Table 12, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表11Table 11
Figure PCTCN2021090960-appb-000010
Figure PCTCN2021090960-appb-000010
Figure PCTCN2021090960-appb-000011
Figure PCTCN2021090960-appb-000011
表12Table 12
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 6.126E-026.126E-02 2.472E+002.472E+00 -5.083E-01-5.083E-01 1.104E-011.104E-01 -1.000E+01-1.000E+01 -1.414E-01-1.414E-01 1.000E+011.000E+01 -1.000E+01-1.000E+01
A4A4 -3.482E-04-3.482E-04 -9.502E-03-9.502E-03 -1.905E-02-1.905E-02 -1.045E-02-1.045E-02 -1.532E-03-1.532E-03 2.251E-022.251E-02 3.842E-033.842E-03 -1.450E-02-1.450E-02
A6A6 2.072E-032.072E-03 1.701E-031.701E-03 5.041E-035.041E-03 3.747E-033.747E-03 -4.431E-03-4.431E-03 -5.905E-02-5.905E-02 -5.337E-02-5.337E-02 -7.888E-03-7.888E-03
A8A8 -2.966E-03-2.966E-03 1.447E-031.447E-03 2.834E-032.834E-03 2.704E-032.704E-03 5.204E-035.204E-03 6.914E-026.914E-02 6.141E-026.141E-02 7.783E-037.783E-03
A10A10 2.643E-032.643E-03 -2.187E-03-2.187E-03 -4.020E-03-4.020E-03 -3.257E-03-3.257E-03 -5.789E-03-5.789E-03 -5.625E-02-5.625E-02 -4.987E-02-4.987E-02 -6.211E-03-6.211E-03
A12A12 -1.463E-03-1.463E-03 1.530E-031.530E-03 2.786E-032.786E-03 2.069E-032.069E-03 3.829E-033.829E-03 3.087E-023.087E-02 2.784E-022.784E-02 3.446E-033.446E-03
A14A14 5.062E-045.062E-04 -6.478E-04-6.478E-04 -1.222E-03-1.222E-03 -8.464E-04-8.464E-04 -1.503E-03-1.503E-03 -1.113E-02-1.113E-02 -1.037E-02-1.037E-02 -1.259E-03-1.259E-03
A16A16 -1.072E-04-1.072E-04 1.633E-041.633E-04 3.322E-043.322E-04 2.236E-042.236E-04 3.210E-043.210E-04 2.505E-032.505E-03 2.444E-032.444E-03 2.854E-042.854E-04
A18A18 1.268E-051.268E-05 -2.245E-05-2.245E-05 -5.012E-05-5.012E-05 -3.382E-05-3.382E-05 -2.832E-05-2.832E-05 -3.153E-04-3.153E-04 -3.294E-04-3.294E-04 -3.666E-05-3.666E-05
A20A20 -6.514E-07-6.514E-07 1.290E-061.290E-06 3.199E-063.199E-06 2.349E-062.349E-06 0.000E+000.000E+00 1.669E-051.669E-05 1.937E-051.937E-05 2.070E-062.070E-06
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK 1.121E+001.121E+00 3.723E+003.723E+00 -1.000E+01-1.000E+01 -1.750E+01-1.750E+01 -1.194E+00-1.194E+00 7.167E-037.167E-03 1.652E+001.652E+00 -8.263E-01-8.263E-01
A4A4 -1.235E-02-1.235E-02 -1.570E-02-1.570E-02 -5.403E-03-5.403E-03 -8.795E-03-8.795E-03 3.345E-033.345E-03 8.168E-038.168E-03 -2.474E-02-2.474E-02 -2.978E-02-2.978E-02
A6A6 -3.124E-03-3.124E-03 5.143E-045.143E-04 4.206E-034.206E-03 3.957E-033.957E-03 -5.248E-03-5.248E-03 -5.961E-03-5.961E-03 3.693E-033.693E-03 4.619E-034.619E-03
A8A8 4.651E-034.651E-03 1.516E-031.516E-03 -1.577E-03-1.577E-03 -1.291E-03-1.291E-03 5.618E-045.618E-04 9.050E-049.050E-04 -4.664E-04-4.664E-04 -6.439E-04-6.439E-04
A10A10 -3.552E-03-3.552E-03 -1.273E-03-1.273E-03 8.393E-058.393E-05 1.252E-041.252E-04 1.349E-051.349E-05 -6.647E-05-6.647E-05 5.078E-055.078E-05 6.122E-056.122E-05
A12A12 1.592E-031.592E-03 5.765E-045.765E-04 5.972E-055.972E-05 1.124E-051.124E-05 -1.112E-05-1.112E-05 3.131E-073.131E-07 -3.690E-06-3.690E-06 -3.646E-06-3.646E-06
A14A14 -4.095E-04-4.095E-04 -1.435E-04-1.435E-04 -1.555E-05-1.555E-05 -3.326E-06-3.326E-06 1.467E-061.467E-06 3.461E-073.461E-07 1.657E-071.657E-07 1.337E-071.337E-07
A16A16 5.740E-055.740E-05 2.036E-052.036E-05 1.717E-061.717E-06 2.837E-072.837E-07 -9.503E-08-9.503E-08 -2.662E-08-2.662E-08 -4.447E-09-4.447E-09 -2.939E-09-2.939E-09
A18A18 -3.717E-06-3.717E-06 -1.557E-06-1.557E-06 -9.245E-08-9.245E-08 -1.111E-08-1.111E-08 3.107E-093.107E-09 8.393E-108.393E-10 6.564E-116.564E-11 3.561E-113.561E-11
A20A20 6.033E-086.033E-08 4.972E-084.972E-08 1.977E-091.977E-09 1.712E-101.712E-10 -4.091E-11-4.091E-11 -9.972E-12-9.972E-12 -4.114E-13-4.114E-13 -1.837E-13-1.837E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2161.216 R71/sd67R71/sd67 11.91911.919
f2/f12f2/f12 -2.582-2.582 sag81/sag72sag81/sag72 1.6751.675
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.7527.752 R52/sd56R52/sd56 -14.481-14.481
sd81/sd31sd81/sd31 3.1623.162 f/f1f/f1 1.0051.005
f8/sag82f8/sag82 3.4673.467      
由图12中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中各参考波长下的焦点偏移均被控制在±0.05mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 12 that the longitudinal spherical aberration, field curvature, astigmatism and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.05mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
第七实施例Seventh Embodiment
参考图13，在第七实施例中，光学***10沿光轴101由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6、具有正屈折力的第七透镜L7以及具有负屈折力的第八透镜L8。光学***10的各透镜面型如下：Referring to FIG. 13 , in the seventh embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, and a second lens L2 with negative refractive power from the object side to the image side along the optical axis 101 , the third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with positive refractive power, the seventh lens L7 with positive refractive power And the eighth lens L8 having negative refractive power. The surface shapes of the lenses of the optical system 10 are as follows:
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近最大有效口径处为凸面，像侧面S2于近最大有效口径处为凸面。The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the maximum effective aperture, and the image side S2 is convex near the maximum effective aperture. .
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近最大 有效口径处为凸面，像侧面S4于近最大有效口径处为凹面。The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the maximum effective aperture, and the image side S4 is concave near the maximum effective aperture .
第三透镜L3的物侧面S5于近光轴处为凹面，像侧面S6于近光轴处为凸面；物侧面S5于近最大有效口径处为凹面，像侧面S6于近最大有效口径处为凸面。The object side S5 of the third lens L3 is concave at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is concave near the maximum effective aperture, and the image side S6 is convex near the maximum effective aperture .
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近最大有效口径处为凸面，像侧面S8于近最大有效口径处为凹面。The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is convex near the maximum effective aperture, and the image side S8 is concave near the maximum effective aperture. .
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近最大有效口径处为凹面，像侧面S10于近最大有效口径处为凸面。The object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the maximum effective aperture, and the image side S10 is convex near the maximum effective aperture. .
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凸面；物侧面S11于近最大有效口径处为凸面，像侧面S12于近最大有效口径处为凹面。The object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is convex at the near optical axis; the object side S11 is convex near the maximum effective aperture, and the image side S12 is concave near the maximum effective aperture. .
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近最大有效口径处为凹面，像侧面S14于近最大有效口径处为凸面。The object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is concave near the maximum effective aperture, and the image side S14 is convex near the maximum effective aperture. .
第八透镜L8的物侧面S15于近光轴处为凹面，像侧面S16于近光轴处为凹面；物侧面S15于近最大有效口径处为凹面，像侧面S16于近最大有效口径处为凸面。The object side S15 of the eighth lens L8 is concave at the near optical axis, and the image side S16 is concave at the near optical axis; the object side S15 is concave near the maximum effective aperture, and the image side S16 is convex near the maximum effective aperture. .
该实施例中光学***10的各透镜参数由表13和表14给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。The parameters of each lens of the optical system 10 in this embodiment are given in Table 13 and Table 14, wherein the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
表13Table 13
Figure PCTCN2021090960-appb-000012
Figure PCTCN2021090960-appb-000012
表14Table 14
面序号face number S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8
KK 1.351E-011.351E-01 7.319E+007.319E+00 -1.684E+00-1.684E+00 -7.295E-01-7.295E-01 2.555E+002.555E+00 1.573E+001.573E+00 -1.000E+01-1.000E+01 -1.000E+01-1.000E+01
A4A4 -8.338E-04-8.338E-04 -1.022E-02-1.022E-02 -1.870E-02-1.870E-02 -9.571E-03-9.571E-03 -3.760E-03-3.760E-03 1.539E-021.539E-02 -1.358E-03-1.358E-03 -1.545E-02-1.545E-02
A6A6 2.487E-032.487E-03 3.041E-033.041E-03 5.600E-035.600E-03 2.734E-032.734E-03 -2.166E-03-2.166E-03 -4.050E-02-4.050E-02 -3.275E-02-3.275E-02 -4.797E-03-4.797E-03
A8A8 -3.116E-03-3.116E-03 4.268E-044.268E-04 2.466E-032.466E-03 4.186E-034.186E-03 1.467E-031.467E-03 4.249E-024.249E-02 3.173E-023.173E-02 4.829E-034.829E-03
A10A10 2.446E-032.446E-03 -1.082E-03-1.082E-03 -3.643E-03-3.643E-03 -5.129E-03-5.129E-03 -1.633E-03-1.633E-03 -3.168E-02-3.168E-02 -2.256E-02-2.256E-02 -3.965E-03-3.965E-03
A12A12 -1.202E-03-1.202E-03 6.588E-046.588E-04 2.225E-032.225E-03 3.319E-033.319E-03 1.058E-031.058E-03 1.581E-021.581E-02 1.089E-021.089E-02 2.104E-032.104E-03
A14A14 3.734E-043.734E-04 -2.291E-04-2.291E-04 -8.170E-04-8.170E-04 -1.334E-03-1.334E-03 -3.952E-04-3.952E-04 -5.113E-03-5.113E-03 -3.484E-03-3.484E-03 -7.221E-04-7.221E-04
A16A16 -7.144E-05-7.144E-05 4.736E-054.736E-05 1.835E-041.835E-04 3.346E-043.346E-04 8.116E-058.116E-05 1.022E-031.022E-03 7.120E-047.120E-04 1.546E-041.546E-04
A18A18 7.693E-067.693E-06 -5.374E-06-5.374E-06 -2.305E-05-2.305E-05 -4.781E-05-4.781E-05 -6.841E-06-6.841E-06 -1.136E-04-1.136E-04 -8.518E-05-8.518E-05 -1.890E-05-1.890E-05
A20A20 -3.594E-07-3.594E-07 2.542E-072.542E-07 1.238E-061.238E-06 3.035E-063.035E-06 0.000E+000.000E+00 5.242E-065.242E-06 4.592E-064.592E-06 1.026E-061.026E-06
面序号face number S9S9 S10S10 S11S11 S12S12 S13S13 S14S14 S15S15 S16S16
KK 1.095E+011.095E+01 5.513E+005.513E+00 -1.000E+01-1.000E+01 -9.901E+00-9.901E+00 -1.562E+00-1.562E+00 1.700E-031.700E-03 4.846E+004.846E+00 -8.004E-01-8.004E-01
A4A4 -1.651E-02-1.651E-02 -1.501E-02-1.501E-02 5.655E-035.655E-03 -5.240E-03-5.240E-03 -2.587E-03-2.587E-03 7.662E-037.662E-03 -2.684E-02-2.684E-02 -3.099E-02-3.099E-02
A6A6 -4.566E-04-4.566E-04 2.669E-042.669E-04 -1.309E-03-1.309E-03 6.004E-046.004E-04 -4.182E-03-4.182E-03 -6.510E-03-6.510E-03 3.697E-033.697E-03 4.687E-034.687E-03
A8A8 1.168E-031.168E-03 -1.413E-04-1.413E-04 -3.973E-04-3.973E-04 -2.214E-04-2.214E-04 6.510E-046.510E-04 1.219E-031.219E-03 -4.025E-04-4.025E-04 -6.045E-04-6.045E-04
A10A10 -5.316E-04-5.316E-04 2.558E-042.558E-04 1.055E-041.055E-04 1.165E-051.165E-05 -4.069E-05-4.069E-05 -1.396E-04-1.396E-04 4.428E-054.428E-05 5.555E-055.555E-05
A12A12 2.018E-042.018E-04 -7.949E-05-7.949E-05 -4.176E-06-4.176E-06 1.738E-061.738E-06 -3.599E-06-3.599E-06 9.515E-069.515E-06 -3.538E-06-3.538E-06 -3.351E-06-3.351E-06
A14A14 -5.658E-05-5.658E-05 1.431E-051.431E-05 -1.562E-06-1.562E-06 1.277E-071.277E-07 9.553E-079.553E-07 -3.134E-07-3.134E-07 1.753E-071.753E-07 1.283E-071.283E-07
A16A16 9.928E-069.928E-06 -1.633E-06-1.633E-06 2.623E-072.623E-07 -5.297E-08-5.297E-08 -7.635E-08-7.635E-08 9.650E-119.650E-11 -5.129E-09-5.129E-09 -3.002E-09-3.002E-09
A18A18 -9.265E-07-9.265E-07 1.039E-071.039E-07 -1.632E-08-1.632E-08 3.661E-093.661E-09 2.751E-092.751E-09 2.725E-102.725E-10 8.163E-118.163E-11 3.920E-113.920E-11
A20A20 3.360E-083.360E-08 -2.779E-09-2.779E-09 3.701E-103.701E-10 -7.874E-11-7.874E-11 -3.797E-11-3.797E-11 -5.100E-12-5.100E-12 -5.473E-13-5.473E-13 -2.193E-13-2.193E-13
该实施例中的光学***10满足以下关系：The optical system 10 in this embodiment satisfies the following relationship:
TTL/ImgHTTL/ImgH 1.2811.281 R71/sd67R71/sd67 9.2939.293
f2/f12f2/f12 -2.407-2.407 sag81/sag72sag81/sag72 1.3731.373
f/tan(semiFOV)(mm)f/tan(semiFOV)(mm) 7.7527.752 R52/sd56R52/sd56 -58.447-58.447
sd81/sd31sd81/sd31 2.9592.959 f/f1f/f1 0.9710.971
f8/sag82f8/sag82 5.0625.062      
由图14中的各像差图可知，光学***10的纵向球差、场曲、像散、畸变均得到良好的控制，其中各参考波长下的焦点偏移均被控制在±0.05mm以内，同时大部分视场下的子午场曲和弧矢场曲均被控制在±0.025mm以内，像面弯曲程度受到有效抑制，且像散得到优良的调节，最大畸变也被控制在2.5％以内，因此可判断该实施例的光学***10可拥有清晰成像。It can be seen from the aberration diagrams in FIG. 14 that the longitudinal spherical aberration, field curvature, astigmatism and distortion of the optical system 10 are well controlled, and the focus shift at each reference wavelength is controlled within ±0.05mm, At the same time, the meridional field curvature and sagittal field curvature in most fields of view are controlled within ±0.025mm, the curvature of the image plane is effectively suppressed, the astigmatism is well adjusted, and the maximum distortion is also controlled within 2.5%. Therefore, it can be judged that the optical system 10 of this embodiment can have a clear image.
相较于传统的光学***，上述各实施例中的光学***10，能够在实现较短轴向总长的小型化设计前提下，保持良好甚至更佳的成像质量，且还有利于降低***的设计难度。Compared with the traditional optical system, the optical system 10 in the above-mentioned embodiments can maintain good or even better imaging quality under the premise of realizing a miniaturized design with a shorter overall axial length, and it is also beneficial to reduce the design of the system. difficulty.
参考图15，本申请的实施例还提供了一种摄像模组20，摄像模组20包括光学***10及图像传感器210，图像传感器210设置于光学***10的像侧，两者可通过支架固定。图像传感器210可以为CCD传感器(Charge Coupled Device，电荷耦合器件)或CMOS传感器(Complementary Metal Oxide Semiconductor，互补金属氧化物半导体)。一般地，在装配时，光学***10的成像面S17与图像传感器210的感光表面重叠。通过采用上述光学***10，摄像模组20同样能够在轴向总长得到压缩的同时的保持良好甚至更佳的成像质量。Referring to FIG. 15 , an embodiment of the present application further provides a camera module 20 . The camera module 20 includes an optical system 10 and an image sensor 210 . The image sensor 210 is disposed on the image side of the optical system 10 , and the two can be fixed by a bracket. . The image sensor 210 may be a CCD sensor (Charge Coupled Device, charge coupled device) or a CMOS sensor (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor). Generally, when assembled, the imaging surface S17 of the optical system 10 overlaps the photosensitive surface of the image sensor 210 . By using the above-mentioned optical system 10 , the camera module 20 can also maintain good or even better imaging quality while the total axial length is compressed.
参考图16，本申请的一些实施例还提供了一种电子设备30。电子设备30包括固定件310，摄像模组20安装于固定件310，固定件310可以为显示屏、电路板、中框、后盖等部件。电子设备30可以为但不限于智能手机、智能手表、智能眼镜、电子书阅读器、平板电脑、生物识别设备(如指纹识别设备或瞳孔识别设备等)、PDA(Personal Digital Assistant，个人数字助理)等。由于上述摄像模组20能够在总长得到压缩的同时维持良好的成像质量，从而当采用上述摄像模组20时，可减少其所占据的电子设备30的内部空间，避免对电子设备30的厚度压缩造成阻碍，同时也能维持电子设备30的拍摄性 能。Referring to FIG. 16 , some embodiments of the present application further provide an electronic device 30 . The electronic device 30 includes a fixing member 310 , and the camera module 20 is mounted on the fixing member 310 , and the fixing member 310 may be a display screen, a circuit board, a middle frame, a back cover and other components. The electronic device 30 can be, but is not limited to, a smart phone, a smart watch, a smart glasses, an e-book reader, a tablet computer, a biometric device (such as a fingerprint recognition device or a pupil recognition device, etc.), a PDA (Personal Digital Assistant, personal digital assistant) Wait. Since the above-mentioned camera module 20 can maintain a good image quality while the overall length is compressed, when the above-mentioned camera module 20 is used, the internal space of the electronic device 30 occupied by the camera module 20 can be reduced, and the thickness of the electronic device 30 can be avoided. Obstacles are created, and at the same time, the photographing performance of the electronic device 30 can be maintained.
本发明实施例中所使用到的“电子设备”可包括，但不限于被设置成经由有线线路连接(如经由公共交换电话网络(public switched telephone network，PSTN)、数字用户线路(digital subscriber line，DSL)、数字电缆、直接电缆连接，以及/或另一数据连接/网络)和/或经由(例如，针对蜂窝网络、无线局域网(wireless local area network，WLAN)、诸如手持数字视频广播(digital video broadcasting handheld，DVB-H)网络的数字电视网络、卫星网络、调幅-调频(amplitude modulation-frequency modulation，AM-FM)广播发送器，以及/或另一通信终端的)无线接口接收/发送通信信号的设备。被设置成通过无线接口通信的电子设备可以被称为“无线通信终端”、“无线终端”以及/或“移动终端”。移动终端的示例包括，但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信***(personal communication system，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位***(global positioning system，GPS)接收器的个人数字助理(personal digital assistant，PDA)；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子设备。The "electronic device" used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via wired lines (eg, via a public switched telephone network (PSTN), digital subscriber line, DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), such as digital video broadcast broadcasting handheld, DVB-H) network digital television network, satellite network, AM-FM (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal) wireless interface to receive/transmit communication signals device of. Electronic devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistants (PDAs) with intranet access, web browsers, memo pads, calendars, and/or global positioning system (GPS) receivers; and conventional laptops and/or palmtops A receiver or other electronic device including a radiotelephone transceiver.
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“竖直”、“水平”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "vertical", "horizontal", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description The present invention and simplified description do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (20)

  1. 一种光学***，沿光轴由物侧至像侧依次包括：An optical system, comprising in sequence from the object side to the image side along the optical axis:
    具有正屈折力的第一透镜，所述第一透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；The first lens with positive refractive power, the object side of the first lens is convex at the near optical axis, and the image side is concave at the near optical axis;
    具有负屈折力的第二透镜，所述第二透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；The second lens with negative refractive power, the object side of the second lens is convex at the near optical axis, and the image side is concave at the near optical axis;
    具有屈折力的第三透镜，所述第三透镜的像侧面于近光轴处为凸面；a third lens with refractive power, the image side of the third lens is convex at the near optical axis;
    具有屈折力的第四透镜，所述第四透镜的像侧面于近光轴处为凹面；a fourth lens with refractive power, the image side of the fourth lens is concave at the near optical axis;
    具有屈折力的第五透镜，所述第五透镜的物侧面于近光轴处为凹面，像侧面于近光轴处为凸面；The fifth lens with refractive power, the object side of the fifth lens is concave at the near optical axis, and the image side is convex at the near optical axis;
    具有屈折力的第六透镜，所述第六透镜的像侧面于近光轴处为凸面；a sixth lens with refractive power, the image side surface of the sixth lens is convex at the near optical axis;
    具有屈折力的第七透镜，所述第七透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面，所述第七透镜的物侧面和像侧面皆为非球面，且其中至少一者存在反曲；The seventh lens with refractive power, the object side of the seventh lens is convex at the near optical axis, the image side is concave at the near optical axis, and the object side and the image side of the seventh lens are aspherical, and at least one of them has a recurve;
    具有负屈折力的第八透镜，所述第八透镜的像侧面于近光轴处为凹面，所述第八透镜的物侧面和像侧面皆为非球面，且其中至少一者存在反曲；The eighth lens with negative refractive power, the image side of the eighth lens is concave at the near optical axis, the object side and the image side of the eighth lens are both aspherical, and at least one of them has inflection;
    所述光学***还满足关系：The optical system also satisfies the relation:
    1.2＜TTL/ImgH＜1.3；1.2<TTL/ImgH<1.3;
    TTL为所述第一透镜的物侧面至所述光学***的成像面于光轴上的距离，ImgH为所述光学***的最大视场角所对应的像高的一半。TTL is the distance from the object side of the first lens to the imaging plane of the optical system on the optical axis, and ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
  2. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    9＜R71/sd67＜16；9<R71/sd67<16;
    R71为所述第七透镜的物侧面于光轴处的曲率半径，sd67为所述第七透镜的物侧面最大有效半口径与所述第六透镜的像侧面最大有效半口径的差值。R71 is the curvature radius of the object side of the seventh lens at the optical axis, and sd67 is the difference between the maximum effective semi-aperture of the seventh lens and the image side of the sixth lens.
  3. 根据权利要求2所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 2, wherein the optical system satisfies the relationship:
    4.817mm≤R71≤5.940mm。4.817mm≤R71≤5.940mm.
  4. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    sag81/sag72＜1.75；sag81/sag72<1.75;
    sag81为所述第八透镜的物侧面于最大有效口径处的矢高，sag72为所述第七透镜的像侧面于最大有效口径处的矢高。sag81 is the sag of the object side of the eighth lens at the maximum effective aperture, and sag72 is the sag of the image side of the seventh lens at the maximum effective aperture.
  5. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    -60＜R52/sd56＜-10；-60＜R52/sd56＜-10;
    R52为所述第五透镜的像侧面于光轴处的曲率半径，sd56为所述第六透镜的物侧面最大有效半口径与所述第五透镜的像侧面最大有效半口径的差值。R52 is the curvature radius of the image side surface of the fifth lens at the optical axis, and sd56 is the difference between the maximum effective semi-aperture of the object side of the sixth lens and the maximum effective semi-aperture of the image side of the fifth lens.
  6. 根据权利要求5所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 5, wherein the optical system satisfies the relationship:
    -34.688mm≤R52≤-4.848mm。-34.688mm≤R52≤-4.848mm.
  7. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    -3＜f2/f12＜-2；-3<f2/f12<-2;
    f2为所述第二透镜的有效焦距，f12为所述第一透镜和所述第二透镜的组合焦距。f2 is the effective focal length of the second lens, and f12 is the combined focal length of the first lens and the second lens.
  8. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    7.5mm＜f/tan(semiFOV)＜7.95mm；7.5mm＜f/tan(semiFOV)＜7.95mm;
    f为所述光学***的有效焦距，semiFOV为所述光学***的最大视场角的一半。f is the effective focal length of the optical system, and semiFOV is half of the maximum field of view of the optical system.
  9. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    2.5＜sd81/sd31＜3.5；2.5＜sd81/sd31＜3.5;
    sd81为所述第八透镜的物侧面的最大有效半口径，sd31为所述第三透镜的物侧面的最大有效半口径。sd81 is the largest effective semi-aperture of the object side of the eighth lens, and sd31 is the largest effective semi-aperture of the object side of the third lens.
  10. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    3.2＜f8/sag82＜5.2；3.2<f8/sag82<5.2;
    f8为所述第八透镜的有效焦距，sag82为所述第八透镜的像侧面于最大有效口径处的矢高。f8 is the effective focal length of the eighth lens, and sag82 is the sag of the image side of the eighth lens at the maximum effective aperture.
  11. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    0.9＜f/f1＜1.1；0.9＜f/f1＜1.1;
    f为所述光学***的有效焦距，f1为所述第一透镜的有效焦距。f is the effective focal length of the optical system, and f1 is the effective focal length of the first lens.
  12. 根据权利要求1所述的光学***，其特征在于，所述光学***满足关系：The optical system according to claim 1, wherein the optical system satisfies the relationship:
    8.89mm≤TTL≤9.15mm。8.89mm≤TTL≤9.15mm.
  13. 根据权利要求1所述的光学***，其特征在于，所述第一透镜的像侧面于近最大有效口径处为凸面。The optical system according to claim 1, wherein the image side surface of the first lens is convex near the maximum effective aperture.
  14. 根据权利要求1所述的光学***，其特征在于，所述第二透镜的物侧面于近最大有效口径处为凸面，像侧面于近最大有效口径处为凹面。The optical system according to claim 1, wherein the object side of the second lens is convex near the maximum effective aperture, and the image side is concave near the maximum effective aperture.
  15. 根据权利要求1所述的光学***，其特征在于，所述第三透镜的物侧面于近最大有效口径处为凹面，像侧面于近最大有效口径处为凸面。The optical system according to claim 1, wherein the object side of the third lens is concave near the maximum effective aperture, and the image side is convex near the maximum effective aperture.
  16. 根据权利要求1所述的光学***，其特征在于，所述第四透镜的像侧面于近最大有效口径处为凹面。The optical system according to claim 1, wherein the image side surface of the fourth lens is concave near the maximum effective aperture.
  17. 根据权利要求1所述的光学***，其特征在于，所述光学***包括孔径光阑，所述孔径光阑设于所述第一透镜的物侧。The optical system according to claim 1, wherein the optical system comprises an aperture stop, and the aperture stop is provided on the object side of the first lens.
  18. 根据权利要求1所述的光学***，其特征在于，所述光学***中各透的物侧面及像侧面均为非球面。The optical system according to claim 1, wherein each transparent object side surface and image side surface in the optical system are aspherical surfaces.
  19. 一种摄像模组，包括图像传感器及权利要求1至18任意一项所述的光学***，所述图像传感器设于所述光学***的像侧。A camera module, comprising an image sensor and the optical system according to any one of claims 1 to 18, wherein the image sensor is arranged on the image side of the optical system.
  20. 一种电子设备，包括固定件及权利要求19所述的摄像模组，所述摄像模组设置于所述固定件。An electronic device, comprising a fixing member and the camera module according to claim 19, wherein the camera module is arranged on the fixing member.
PCT/CN2021/090960 2021-04-29 2021-04-29 Optical system, camera module and electronic device WO2022226888A1 (en)

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