WO2022204923A1 - 光学***、取像模组及电子设备 - Google Patents

光学***、取像模组及电子设备 Download PDF

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Publication number
WO2022204923A1
WO2022204923A1 PCT/CN2021/083858 CN2021083858W WO2022204923A1 WO 2022204923 A1 WO2022204923 A1 WO 2022204923A1 CN 2021083858 W CN2021083858 W CN 2021083858W WO 2022204923 A1 WO2022204923 A1 WO 2022204923A1
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Prior art keywords
lens
optical system
refractive power
optical axis
image side
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PCT/CN2021/083858
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English (en)
French (fr)
Inventor
徐标
李明
宋琦
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欧菲光集团股份有限公司
江西晶超光学有限公司
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Priority to PCT/CN2021/083858 priority Critical patent/WO2022204923A1/zh
Publication of WO2022204923A1 publication Critical patent/WO2022204923A1/zh

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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 field of imaging, in particular to an optical system, an imaging module and an electronic device.
  • an optical imaging system an imaging 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 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 fourth lens is concave at the near optical axis
  • the object side of the fifth lens is concave at the near optical axis
  • the image side of the sixth lens is concave at the near optical axis
  • an eighth lens with negative refractive power wherein the image side of the eighth lens is concave at the near optical axis;
  • ImgH is half of the image height corresponding to the maximum angle of view of the optical system
  • TTL is the distance from the object side of the first lens to the imaging plane of the optical system on the optical axis, that is, the optical axis
  • the total optical length of the system, FNO is the aperture number of the optical system.
  • An imaging module includes a photosensitive element and the optical system according to any one of the above embodiments, wherein the photosensitive element is arranged on the image side of the optical system.
  • An electronic device includes a casing and the above-mentioned imaging module, wherein the imaging module is arranged on the casing.
  • FIG. 1 is a schematic structural diagram of an optical system in a first embodiment of the present application
  • FIG. 2 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the first embodiment of the application;
  • FIG. 3 is a schematic structural diagram of an optical system in a second embodiment of the present application.
  • FIG. 4 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the second embodiment of the application;
  • FIG. 5 is a schematic structural diagram of an optical system in a third embodiment of the present application.
  • FIG. 6 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the third embodiment of the present application;
  • FIG. 7 is a schematic structural diagram of an optical system in a fourth embodiment of the present application.
  • FIG. 8 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the fourth embodiment of the present application;
  • FIG. 9 is a schematic structural diagram of an optical system in a fifth embodiment of the present application.
  • FIG. 10 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the fifth embodiment of the application;
  • FIG. 11 is a schematic structural diagram of an optical system in a sixth embodiment of the present application.
  • FIG. 13 is a schematic diagram of an imaging module in an embodiment of the application.
  • FIG. 14 is a schematic diagram of an electronic device in an embodiment of the present application.
  • the optical system 100 includes a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , and a second lens L1 , a second lens L2 , a third lens L3 A five lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8.
  • the first lens L1 includes an object side S1 and an image side S2
  • the second lens L2 includes an object side S3 and an image side S4
  • the third lens L3 includes an object side S5 and an image side S6
  • the fourth lens L4 includes an object side S7 and the image side S8,
  • the fifth lens L5 includes the object side S9 and the image side S10
  • the sixth lens L6 includes the object side S11 and the image side S12
  • the seventh lens L7 includes the object side S13 and the image side S14
  • the eighth lens L8 includes the object side S13 and the image side S14.
  • Side S15 and like Side S16 Side S15 and like Side S16.
  • the first lens L1 has a positive refractive power, which is helpful for shortening the total system length of the optical system 100 and satisfies the requirement of miniaturized design of the optical system 100 .
  • the object side surface S2 of the first lens L1 is convex at the near optical axis 110, which is beneficial to enhance the positive refractive power of the first lens L1, further shortening the total system length of the optical system 100, and at the same time, it is also beneficial to make the light in each field of view uniform. into the optical system 100 .
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110 .
  • the second lens L2 has refractive power
  • the object side S3 of the second lens L2 is convex at the near optical axis 110
  • the image side S4 is concave at the near optical axis 110
  • the third lens L3 has refractive power.
  • the fourth lens L4 has refractive power, and the image side surface S8 of the fourth lens L4 is concave at the near optical axis 110 .
  • the fifth lens L5 has refractive power, and the object side surface S9 of the fifth lens L5 is concave at the near optical axis 110 .
  • the sixth lens L6 has refractive power.
  • the image side surface S12 of the sixth lens L6 is concave at the paraxial position 110 , which is beneficial to shorten the overall system length of the optical system 100 .
  • the seventh lens L7 has a positive refractive power, which is beneficial to improve the ability of the optical system 100 to focus light at the image side.
  • the eighth lens L8 has a negative refractive power, which is beneficial to correct the aberration caused by the optical system 100 to shorten the total length of the system.
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 , which can keep the principal point away from the imaging surface of the optical system 100 , thereby further shortening the overall system length of the optical system 100 .
  • the combination of different surface shapes of the lenses enables the light entering the optical system 100 to stably pass through the surfaces of the lenses and finally irradiate on the imaging surface of the optical system 100 for imaging.
  • a reasonable surface configuration helps to reduce the attenuation of the subject information by the optical system 100 and improve the resolution of the lens, so that the optical system 100 has good imaging quality.
  • the optical system 100 is provided with a stop STO, and the stop STO can be arranged on the object side of the first lens L1 or on the object side S1 of the first lens L1.
  • the optical system 100 further includes an infrared cut filter L9 disposed on the image side of the eighth lens L8, and the infrared cut filter L9 includes an object side S17 and an image side S18.
  • the infrared cut-off filter L9 is used to filter out interference light, so as to prevent the interference light from reaching the imaging surface of the optical system 100 and affecting normal imaging.
  • the optical system 100 further includes an image surface S19 located on the image side of the eighth lens L8, the image surface S19 is the imaging surface of the optical system 100, and the incident light passes through the first lens L1, the second lens L2, the third lens L3, The fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 can form an image on the image plane S19 after adjustment.
  • the object side and the image side of each lens of the optical system 100 are aspherical.
  • the adoption of the aspherical structure can improve the flexibility of lens design, effectively correct spherical aberration, and improve image quality.
  • the object side surface and the image side surface of each lens of the optical system 100 may also be spherical surfaces. It should be noted that the above embodiments are only examples of some embodiments of the present application. In some embodiments, the surfaces of the lenses in the optical system 100 may be aspherical or any combination of spherical surfaces.
  • the material of each lens in the optical system 100 may be glass or plastic.
  • the use of the plastic lens can reduce the weight of the optical system 100 and reduce the production cost, and realize the light and thin design of the optical system in conjunction with the miniaturization of the optical system.
  • the lens made of glass enables the optical system 100 to have excellent optical performance and high temperature resistance.
  • the material of each lens in the optical system 100 can also be any combination of glass and plastic, and not necessarily all of glass or all of plastic.
  • the first lens L1 does not mean that there is only one lens.
  • the surface of the cemented lens closest to the object side can be regarded as the object side S1, and the surface closest to the image side can be regarded as the image side S2.
  • a cemented lens is not formed between the lenses in the first lens L1, but the distance between the lenses is relatively fixed.
  • the object side of the lens closest to the object side is the object side S1
  • the lens closest to the image side The image side is the image side S2.
  • the number of lenses in the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 or the eighth lens L8 in some embodiments may also be greater than or equal to Two lenses, and any adjacent lenses can form a cemented lens or a non-cemented lens.
  • the optical system 100 satisfies the conditional formula: 2.5mm ⁇ ImgH 2 /(TTL*FNO) ⁇ 2.53mm; wherein, ImgH is half of the image height corresponding to the maximum angle of view of the optical system 100 , TTL is the distance from the object side S1 of the first lens L1 to the imaging surface of the optical system 100 on the optical axis 110 , that is, the total optical length of the optical system 100 , and FNO is the aperture number of the optical system 100 .
  • ImgH 2 /(TTL*FNO) can be: 2.51, 2.52 or 2.53, and the numerical unit is mm.
  • Satisfying the above conditional formula can reasonably configure the half image height, total optical length and aperture number of the optical system 100, which is beneficial to expand the maximum field of view of the optical system 100, so that the optical system 100 can obtain more scene contents, enriching the The imaging information of the optical system 100; in addition, it is also beneficial for the optical system 100 to realize the characteristics of a large aperture, which increases the amount of light entering the optical system 100, thereby improving the imaging quality of the optical system 100 in a low-light environment, and enables the optical system 100 to have A better blur effect can be achieved, thereby meeting the requirements of high imaging quality; in addition, it is also beneficial to shorten the total system length of the optical system 100 and realize a miniaturized design.
  • the optical system 100 satisfies the conditional formula: 82.5° ⁇ FOV ⁇ 84°; wherein, FOV is the maximum angle of view of the optical system 100 .
  • FOV may be: 82.5, 82.6, 82.8, 82.9, 83, 83.1, 83.3, 83.6, 83.9 or 84, and the numerical unit is °.
  • the optical system 100 has a wide-angle characteristic, so that the optical system 100 can acquire more scene contents and enrich the imaging information of the optical system 100 .
  • the optical system 100 can be matched with a photosensitive element having a rectangular photosensitive surface, and the imaging surface of the optical system 100 is coincident with the photosensitive surface of the photosensitive element.
  • the effective pixel area on the imaging surface of the optical system 100 has a horizontal direction and a diagonal direction, then ImgH can be understood as half of the diagonal length of the effective pixel area on the imaging surface of the optical system 100, and FOV can be understood as the optical system. 100 Maximum field of view in the diagonal direction.
  • the optical system 100 satisfies the conditional formula: 5.4mm ⁇ f*tan(HFOV) ⁇ 5.5mm; where f is the effective focal length of the optical system 100 , and HFOV is half of the maximum field angle of the optical system 100 .
  • f*tan(HFOV) can be: 5.41, 5.42, 5.43, 5.44, 5.45, 5.46, 5.47, 5.48 or 5.49, and the numerical unit is mm.
  • the effective focal length and the maximum half angle of view of the optical system 100 can be reasonably configured, which is beneficial to shorten the total system length of the optical system 100 and meet the requirements of miniaturized design; at the same time, it is also beneficial to reduce the amount of light in the optical system 100. Therefore, the surface shape of each lens in the optical system 100 will not be excessively bent or too flat, which is beneficial to improve the yield of injection molding of each lens; in addition, it is also beneficial to make the optical system 100 have a large image surface Therefore, the optical system 100 can be matched with a larger-sized photosensitive element, thereby helping to improve the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 1.35 ⁇ TTL/ImgH ⁇ 1.4.
  • TTL/ImgH may be: 1.37 or 1.38. Satisfying the above conditional expression is beneficial to shorten the overall system length of the optical system 100 and meet the requirements of miniaturized design.
  • the total system length of the optical system 100 is too short and/or the half image height is too large, resulting in poor edge imaging, which is not conducive to the improvement of the imaging quality of the optical system 100 while meeting the requirements of miniaturized design;
  • the upper limit of the conditional expression is that the total system length of the optical system 100 is too long, which is not conducive to the miniaturization design of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 1 ⁇
  • may be: 1.015, 1.033, 1.043, 1.067, 1.099, 1.122, 1.130, 1.139, 1.140 or 1.142.
  • the surface shape of the seventh lens L7 can be reasonably configured, so that the surface shape of the seventh lens L7 will not be excessively curved or too flat, thereby helping to reduce the tolerance sensitivity of the seventh lens L7 and improve the seventh lens L7 high injection molding yield; meanwhile, it is also beneficial to balance the advanced coma aberration of the optical system 100 and improve the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 3 ⁇
  • may be: 3.43, 5.36, 7.31, 8.39, 11.25, 13.15, 16.58, 19.33, 20.02 or 24.44.
  • the ratio of the effective focal length of the first lens L1 to the sum of the effective focal lengths of the seventh lens L7 and the eighth lens L8 can be reasonably configured, so as to reasonably allocate the first lens L1, the seventh lens L7 and the eighth lens
  • the spherical aberration of the lens L8 contributes, thereby enabling the on-axis region of the optical system 100 to have good imaging quality.
  • the optical system 100 satisfies the conditional formula: 1 ⁇ f67/f ⁇ 1.5; where f67 is the combined focal length of the sixth lens L6 and the seventh lens L7 , and f is the effective focal length of the optical system 100 .
  • f67/f may be: 1.00, 1.05, 1.09, 1.11, 1.15, 1.18, 1.20, 1.25, 1.27 or 1.31.
  • the ratio of the combined focal length of the sixth lens L6 and the seventh lens L7 and the effective focal length of the optical system 100 can be reasonably configured, so that the combined focal length of the sixth lens L6 and the seventh lens L7 is in the optical system 100. It will not be too strong, which is beneficial to correct the high-order spherical aberration of the optical system 100 , thereby improving the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 0.35mm ⁇ ET2 ⁇ 0.5mm; wherein, ET2 is the maximum effective aperture of the object side S3 of the second lens L2 to the maximum effective aperture of the image side S4 of the second lens L2
  • ET2 may be: 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42 or 0.43, and the numerical unit is mm.
  • the optical system 100 satisfies the conditional formula: 0.5 ⁇
  • SAG61 is the sagittal height at the maximum effective aperture of the object side surface S1 of the sixth lens L6, that is, the object of the sixth lens L6
  • CT6 is the thickness of the sixth lens L6 on the optical axis 110, that is, the thickness of the sixth lens L6 Center thickness.
  • may be: 0.60, 0.62, 0.63, 0.65, 0.68, 0.70, 0.74, 0.75, 0.76 or 0.77.
  • the ratio of the sag height and the center thickness of the sixth lens L6 can be reasonably configured, which is beneficial to make the surface shape of the sixth lens L6 more reasonable, thereby reducing the tolerance sensitivity of the sixth lens L6, and improving the sixth lens L6.
  • the optical system 100 satisfies the conditional formula: 5 ⁇
  • may be 7.95. Satisfying the above conditional formula, the difference between the Abbe numbers of the fourth lens L4 and the fifth lens L5 can be reasonably configured, which is beneficial to correct the chromatic aberration of the optical system 100, reduce the secondary spectrum of the optical system 100, and improve the optical system 100. image quality.
  • the reference wavelength of the above effective focal length is 555nm, and the reference wavelength of Abbe number is 587.56nm.
  • FIG. 1 is a schematic structural diagram of the optical system 100 in the first embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a The second lens L2 with negative refractive power, 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 negative refractive power, the The seventh lens L7 with positive refractive power and the eighth lens L8 with negative refractive power.
  • FIG. 2 is a graph of longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the first embodiment from left to right, wherein the reference wavelength of the astigmatism graph and the distortion graph is 555 nm, and the other embodiments are the same.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S6 of the third lens L3 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the shape of the surface from the center (the intersection of the surface and the optical axis 110) to the edge direction can be purely convex; Or transition from a convex shape at the center to a concave shape and then become convex near the maximum effective radius.
  • This is only an example for illustrating the relationship between the optical axis 110 and the circumference.
  • Various shapes and structures of the surface (concave-convex relationship) are not fully reflected, but other situations can be derived from the above examples.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the distance from the side S1 to the imaging surface of the optical system 100 on the optical axis 110 is the total optical length of the optical system 100
  • FNO is the aperture number of the optical system 100 .
  • Satisfying the above conditional formula can reasonably configure the half image height, total optical length and aperture number of the optical system 100, which is beneficial to expand the maximum field of view of the optical system 100, so that the optical system 100 can obtain more scene contents, enriching the The imaging information of the optical system 100; in addition, it is also beneficial for the optical system 100 to realize the characteristics of a large aperture, which increases the amount of light entering the optical system 100, thereby improving the imaging quality of the optical system 100 in a low-light environment, and enables the optical system 100 to have A better blur effect can be achieved, thereby meeting the requirements of high imaging quality; in addition, it is also beneficial to shorten the total system length of the optical system 100 and realize a miniaturized design.
  • the surface shape of each lens in the optical system 100 will not be excessively bent or too flat, which is beneficial to improve the yield of injection molding of each lens; in addition, it is also beneficial to make the optical system 100 have a large image surface Therefore, the optical system 100 can be matched with a larger-sized photosensitive element, thereby helping to improve the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula:
  • 1.121; wherein, R13 is the radius of curvature of the object side surface S13 of the seventh lens L7 at the optical axis 110, and R14 is the image of the seventh lens L7 The curvature radius of the side surface S14 at the optical axis 110 .
  • the surface shape of the seventh lens L7 can be reasonably configured, so that the surface shape of the seventh lens L7 will not be excessively curved or too flat, thereby helping to reduce the tolerance sensitivity of the seventh lens L7 and improve the seventh lens L7 high injection molding yield; meanwhile, it is also beneficial to balance the advanced coma aberration of the optical system 100 and improve the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula:
  • 12.14; wherein, f1 is the effective focal length of the first lens L1, f7 is the effective focal length of the seventh lens L7, and f8 is the effective focal length of the eighth lens L8 . Satisfying the above conditional formula, the ratio of the effective focal length of the first lens L1 to the sum of the effective focal lengths of the seventh lens L7 and the eighth lens L8 can be reasonably configured, so as to reasonably allocate the first lens L1, the seventh lens L7 and the eighth lens The spherical aberration of the lens L8 contributes, thereby enabling the on-axis region of the optical system 100 to have good imaging quality.
  • the optical system 100 satisfies the conditional formula:
  • 0.75; wherein, SAG61 is the sag at the maximum effective aperture of the object side S1 of the sixth lens L6, CT6 is the thickness of the sixth lens L6 on the optical axis 110, that is, The center thickness of the sixth lens L6. Satisfying the above conditional formula, the ratio of the sag height and the center thickness of the sixth lens L6 can be reasonably configured, which is beneficial to make the surface shape of the sixth lens L6 more reasonable, thereby reducing the tolerance sensitivity of the sixth lens L6, and improving the sixth lens L6. The processing and molding yield of lens L6.
  • the optical system 100 satisfies the conditional formula:
  • 7.95; wherein, V4 is the Abbe number of the fourth lens L4 under the d-line (587.56nm wavelength), and V5 is the Abbe of the fifth lens L5 under the d-line number. Satisfying the above conditional formula, the difference between the Abbe numbers of the fourth lens L4 and the fifth lens L5 can be reasonably configured, which is beneficial to correct the chromatic aberration of the optical system 100, reduce the secondary spectrum of the optical system 100, and improve the optical system 100. image quality.
  • the image plane S19 in Table 1 can be understood as the imaging plane of the optical system 100 .
  • the elements from the object plane (not shown) to the image plane S19 are sequentially arranged in the order of the elements in Table 1 from top to bottom.
  • the Y radius in Table 1 is the curvature radius of the object side surface or the image side surface of the corresponding surface number at the optical axis 110 .
  • the surface number S1 and the surface number S2 are the object side S1 and the image side S2 of the first lens L1 respectively, that is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side.
  • the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis 110, and the second value is the rear surface of the lens in the direction from the image side to the image side on the optical axis 110 the distance.
  • the optical system 100 may not be provided with the infrared cut filter L9, but at this time, the distance from the image side S16 to the image plane S19 of the eighth lens L8 remains unchanged.
  • the reference wavelength of the focal length of each lens is 555 nm
  • the reference wavelengths of the refractive index and Abbe number are both 587.56 nm (d-line), and other embodiments are also the same.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 2.
  • the surface numbers from S1-S16 represent the image side or the object side S1-S16 respectively.
  • K-A20 represent the types of aspheric coefficients, where K represents the conic coefficient, A4 represents the fourth-order aspheric coefficient, A6 represents the sixth-order aspheric coefficient, and A8 represents the eight-order aspheric coefficient. analogy.
  • the aspheric coefficient formula is as follows:
  • Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex
  • r is the distance from the corresponding point on the aspherical surface to the optical axis 110
  • c is the curvature of the aspherical vertex
  • k is the conic coefficient
  • Ai is the aspherical surface.
  • FIG. 2 includes a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the optical system 100 , which represents the deviation of the converging 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 ray and the optical axis 110 (unit is mm) .
  • FIG. 2 also includes a field curvature diagram (ASTIGMATIC FIELD CURVES) of the optical system 100, 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 100 is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images.
  • FIG. 2 also includes a distortion diagram (DISTORTION) of the optical system 100. It can be seen from the diagram that the image distortion caused by the main beam is small, and the imaging quality of the system is excellent.
  • DISTORTION distortion diagram
  • FIG. 3 is a schematic structural diagram of the optical system 100 in the second embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a lens from the object side to the image side.
  • the second lens L2 with negative refractive power
  • 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 negative refractive power
  • FIG. 4 is a graph showing longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the second embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S6 of the third lens L3 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the parameters of the optical system 100 are given in Table 3, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 4, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 5 is a schematic structural diagram of the optical system 100 in the third embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a The second lens L2 with negative refractive power, 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 The seventh lens L7 with positive refractive power and the eighth lens L8 with negative refractive power.
  • FIG. 6 is a graph showing longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the third embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S6 of the third lens L3 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the parameters of the optical system 100 are given in Table 5, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 6, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 7 is a schematic structural diagram of the optical system 100 in the fourth embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a lens from the object side to the image side.
  • the second lens L2 with negative refractive power
  • 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 negative refractive power
  • FIG. 8 is a graph showing longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the fourth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S6 of the third lens L3 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the parameters of the optical system 100 are given in Table 7, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 8, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 9 is a schematic structural diagram of the optical system 100 in the fifth embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a The second lens L2 with positive refractive power, 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 negative refractive power, the The seventh lens L7 with positive refractive power and the eighth lens L8 with negative refractive power.
  • FIG. 10 is a graph showing longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the fifth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S6 of the third lens L3 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the parameters of the optical system 100 are given in Table 9, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 10, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 11 is a schematic structural diagram of the optical system 100 in the sixth embodiment.
  • the optical system 100 sequentially includes a diaphragm STO, a first lens L1 with positive refractive power, and a The second lens L2 with negative refractive power, 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 The seventh lens L7 with positive refractive power and the eighth lens L8 with negative refractive power.
  • FIG. 12 is a graph of longitudinal spherical aberration, astigmatism and distortion of the optical system 100 in the sixth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S2 of the first lens L1 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S3 of the second lens L2 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the circumference;
  • the object side surface S5 of the third lens L3 is concave at the near optical axis 110, and is concave at the circumference;
  • the image side surface S6 of the third lens L3 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S7 of the fourth lens L4 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110 and a convex surface at the circumference;
  • the object side surface S9 of the fifth lens L5 is a concave surface at the near optical axis 110, and is a concave surface at the circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface at the near optical axis 110, and is a convex surface at the circumference;
  • the object side surface S11 of the sixth lens L6 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S12 of the sixth lens L6 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface at the near optical axis 110, and a convex surface at the circumference;
  • the object side surface S15 of the eighth lens L8 is a convex surface at the near optical axis 110 and a concave surface at the circumference;
  • the image side surface S16 of the eighth lens L8 is concave at the near optical axis 110 and convex at the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , the seventh lens L7 and the eighth lens L8 are aspherical.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all plastics.
  • the parameters of the optical system 100 are given in Table 11, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 12, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the optical system 100 can be assembled with the photosensitive element 210 to form the imaging module 200 .
  • the photosensitive surface of the photosensitive element 210 can be regarded as the image surface S19 of the optical system 100 .
  • the imaging module 200 may also be provided with an infrared cut-off filter L9, and the infrared cut-off filter L9 is disposed between the image side S16 and the image surface S19 of the eighth lens L8.
  • the photosensitive element 210 may be a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor).
  • optical system 100 in the image capturing module 200 is beneficial to achieve wide-angle characteristics and large aperture characteristics, and is also beneficial to the miniaturized design of the optical system 100 , thereby reducing the size of the image capturing module 200 .
  • the imaging module 200 can be applied to an electronic device 300 , the electronic device includes a casing 310 , and the imaging module 200 is disposed in the casing 310 .
  • the electronic device 300 may be, but is not limited to, a mobile phone, a video phone, a smart phone, an electronic book reader, a vehicle-mounted camera device such as a driving recorder, or a wearable device such as a smart watch.
  • the housing 310 may be a middle frame of the electronic device 300 .
  • the use of the imaging module 200 in the electronic device 300 is conducive to achieving wide-angle characteristics and large aperture characteristics, and is also conducive to the miniaturized design of the optical system 100 , thereby reducing the size of the electronic device 300 .
  • 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

一种光学***(100)、取像模组(200)及电子设备(300)。光学***（100）包括具有正屈折力的第一透镜(L1)，物侧面(S1)为凸面，像侧面(S2)为凹面；具有屈折力的第二透镜(L2)，物侧面(S3)为凸面，像侧面(S4)为凹面；具有屈折力的第三透镜(L3)；具有屈折力的第四透镜(L4)，像侧面(S8)为凹面；具有屈折力的第五透镜(L5)，物侧面(S9)为凹面；具有屈折力的第六透镜(L6)，像侧面(S12)为凹面；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)，像侧面(S16)于近光轴(110)处为凹面；满足2.5mm≤ImgH 2/(TTL*FNO)≤2.53mm。

Description

光学***、取像模组及电子设备 技术领域
本发明涉及摄像领域，特别是涉及一种光学***、取像模组及电子设备。
背景技术
随着摄像技术的迅速发展，用户对智能手机、平板电脑等电子设备的成像质量要求也越来越高，高质量的成像能够为用户带来更高画质的拍摄体验，而电子设备中光学***的性能提升是成像质量提升的关键因素之一。然而，目前的光学***，在夜景、雨天、星空等弱光环境下拍摄效果不佳，难以满足高成像质量的要求。
发明内容
根据本申请的各种实施例，提供一种光学成像***、取像模组和电子设备。
一种光学***，沿光轴由物侧至像侧依次包括：
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；
具有屈折力的第二透镜，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；
具有屈折力的第三透镜；
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；
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；
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凹面；
具有正屈折力的第七透镜；以及
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；
且所述光学***满足以下条件式：
2.5mm≤ImgH 2/(TTL*FNO)≤2.53mm；
其中，ImgH为所述光学***的最大视场角所对应的像高的一半，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，即所述光学***的光学总长，FNO为所述光学***的光圈数。
一种取像模组，包括感光元件以及上述任一实施例所述的光学***，所述感光元件设置于所述光学***的像侧。
一种电子设备，包括壳体以及上述的取像模组，所述取像模组设置于所述壳体。
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。
附图说明
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。
图1为本申请第一实施例中的光学***的结构示意图；
图2为本申请第一实施例中的光学***的纵向球差图、像散图及畸变图；
图3为本申请第二实施例中的光学***的结构示意图；
图4为本申请第二实施例中的光学***的纵向球差图、像散图及畸变图；
图5为本申请第三实施例中的光学***的结构示意图；
图6为本申请第三实施例中的光学***的纵向球差图、像散图及畸变图；
图7为本申请第四实施例中的光学***的结构示意图；
图8为本申请第四实施例中的光学***的纵向球差图、像散图及畸变图；
图9为本申请第五实施例中的光学***的结构示意图；
图10为本申请第五实施例中的光学***的纵向球差图、像散图及畸变图；
图11为本申请第六实施例中的光学***的结构示意图；
图12为本申请第六实施例中的光学***的纵向球差图、像散图及畸变图；
图13为本申请一实施例中的取像模组的示意图；
图14为本申请一实施例中的电子设备的示意图。
具体实施方式
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。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“内”、“外”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
请参见图1，在本申请的一些实施例中，光学***100沿光轴110由物侧到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以及第八透镜L8。具体地，第一透镜L1包括物侧面S1及像侧面S2，第二透镜L2包括物侧面S3及像侧面S4，第三透镜L3包括物侧面S5及像侧面S6，第四透镜L4包括物侧面S7及像侧面S8，第五透镜L5包括物侧面S9及像侧面S10，第六透镜L6包括物侧面S11及像侧面S12，第七透镜L7包括物侧面S13及像侧面S14，第八透镜L8包括物侧面S15和像侧面S16。
其中，第一透镜L1具有正屈折力，有助于缩短光学***100的***总长，满足光学***100小型化设计的需求。第一透镜L1的物侧面S2于近光轴110处为凸面，有利于增强第一透镜L1的正屈折力，进一步缩短光学***100的***总长，同时也有利于使得各视场的光线能均匀进入光学***100中。第一透镜L1的像侧面S2于近光轴110处为凹面。第二透镜L2具有屈折力，第二透镜L2的物侧面S3于近光轴110处为凸面，像侧面S4于近光轴110处为凹面。第三透镜L3具有屈折力。第四透镜L4具有屈折力，第四透镜L4的像侧面S8于近光轴110处为凹面。第五透镜L5具有屈折力，第五透镜L5的物侧面S9于近光轴110处为凹面。第六透镜L6具有屈折力。第六透镜L6的像侧面S12于近轴110处为凹面，有利于缩短光学***100的***总长。第七透镜L7具有正屈折力，有利于提升光学***100像侧端汇聚光线的能力。第八透镜L8具有负屈折力，有利于校正光学***100为缩短***总长而产生的像差。第八透镜L8的像侧面S16于近光轴110处为凹面，能够使主点远离光学***100的成像面，从而进一步缩短光学***100的***总长。各透镜不同面型的搭配使得进入光学***100的光线能够稳定的穿过各透镜的表面最终照射在光学***100的成像面成像。同时，合理的面型搭配有助于减少光学***100对被摄物信息的衰减，提高镜头解像力，从而使光学***100具备良好的成像质量。
另外，在一些实施例中，光学***100设置有光阑STO，光阑STO可设置于第一透镜L1的物侧或设置于第一透镜L1的物侧面S1上。在一些实施例中，光学***100还包括设置于第八透镜L8像侧的红外截止滤光片L9，红外截止滤光片L9包括物侧面S17及像侧面S18。红外截止滤光片L9用于滤除干扰光，防止干扰光到达光学***100的成像面而影响正常成像。进一步地，光学***100还包括位于第八透镜L8像侧的像面S19，像面S19即为光学***100的成像面，入射光经第一透镜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以及第八透镜L8调节后能够成像于像面S19。
在一些实施例中，光学***100的各透镜的物侧面和像侧面均为非球面。非球面结构的采用能够提高透镜设计的灵活性，并有效地校正球差，改善成像质量。在另一些实施例中，光学***100的各透镜的物侧面和像侧面也可以均为球面。需要注意的是，上述实施例仅是对本申请的一些实施例的举例，在一些实施例中，光学***100中各透镜的表面可以是非球面或球面的任意组合。
在一些实施例中，光学***100中的各透镜的材质可以均为玻璃或均为塑料。采用塑料材质的透镜能够减少光学***100的重量并降低生产成本，配合光学***的小型化以实现光学***的轻薄化设计。而采用玻璃材质的透镜使光学***100具备优良的光学性能以及较高的耐温性能。需要注意的是，光学***100中各透镜的材质也可以为玻璃和塑料的任意组合，并不一定要是均为玻璃或均为塑料。
需要注意的是，第一透镜L1并不意味着只存在一片透镜，在一些实施例中，第一透镜L1中也可以存在两片或多片透镜，两片或多片透镜能够形成胶合透镜，胶合透镜最靠近物侧的表面可视为物侧面S1，最靠近像侧的表面可视为像侧面S2。或者，第一透镜L1中的各透镜之间并不形成胶合透镜，但各透镜之间的距离相对固定，此时最靠近物侧的透镜的物侧面为物侧面S1，最靠近像侧的透镜的像侧面为像侧面S2。另外，一些实施例中的第二透镜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或第八透镜L8中的透镜数量也可大于或等于两片，且任意相邻透镜之间可以形成胶合透镜，也可以为非胶合透镜。
进一步地，在一些实施例中，光学***100满足条件式：2.5mm≤ImgH 2/(TTL*FNO)≤2.53mm；其中，ImgH为光学***100的最大视场角所对应的像高的一半，TTL为第一透镜L1的物侧面S1至光学***100的成像面于光轴110上的距离，即光学***100的光学总长，FNO为光学***100的光圈数。具体地，ImgH 2/(TTL*FNO)可以为：2.51、2.52或2.53，数值单位为mm。满足上述条件式，能够对光学***100的半像高、光学总长及光圈数进行合理配置，有利于扩大光学***100的最大视场角，从而使光学***100能够获取更多的场景内容，丰富光学***100的成像信息；另外，也有利于光学***100实现大光圈的特性，提升光学***100的进光量，从而提升光学***100在弱光环境下的成像质量，并且能够使得光学***100具有更好的虚化效果，进而满足高成像质量的要求；再者，还有利于缩短光学***100的***总长，实现小型化设计。
在一些实施例中，光学***100满足条件式：82.5°≤FOV≤84°；其中，FOV为光学***100的最大视场角。具体地，FOV可以为：82.5、82.6、82.8、82.9、83、83.1、83.3、83.6、83.9或84，数值单位为°。满足以上条件式时，光学***100具备广角特性，从而使光学***100能够获取更多的场景内容，丰富光学***100的成像信息。
需要说明的是，在一些实施例中，光学***100可以匹配具有矩形感光面的感光元件，光学***100的成像面与感光元件的感光面重合。此时，光学***100成像面上有效像素区域具有水平方向以及对角线方向，则ImgH可以理解为光学***100成像面上有效像素区域对角线方向的长度的一半，FOV可以理解为光学***100对角线方向的最大视场角。
在一些实施例中，光学***100满足条件式：5.4mm≤f*tan(HFOV)≤5.5mm；其中，f为光学***100的有效焦距，HFOV为光学***100的最大视场角的一半。具体地，f*tan(HFOV)可以为：5.41、5.42、5.43、5.44、5.45、5.46、5.47、5.48或5.49，数值单位为mm。满足上述条件式，能够合理配置光学***100的有效焦距及最大半视场角，有利于缩短光学***100的***总长，满足小型化设计的需求；同时也有利于减小光线在光学***100中的偏折角度，从而使得光学***100中各透镜的面型不会过度弯折或过于平缓，有利于提升各透镜注塑成型的良率；再者，还有利于使得光学***100具备大像面特性，从而使光学***100能够匹配更大尺寸的感光元件，进而有利于提升光学***100的成像质量。
在一些实施例中，光学***100满足条件式：1.35≤TTL/ImgH≤1.4。具体地，TTL/ImgH可以为：1.37或1.38。满足上述条件式，有利于缩短光学***100的***总长，满足小型化 设计的要求。低于上述条件式的下限，光学***100的***总长过短和/或半像高过大，导致边缘成像不良，在实现小型化设计需求的同时不利于光学***100成像质量的提高；超过上述条件式的上限，光学***100的***总长过长，不利于光学***100的小型化设计。
在一些实施例中，光学***100满足条件式：1≤|R13+R14|/|R13-R14|≤1.2；其中，R13为第七透镜L7的物侧面S13于光轴110处的曲率半径，R14为第七透镜L7的像侧面S14于光轴110处的曲率半径。具体地，|R13+R14|/|R13-R14|可以为：1.015、1.033、1.043、1.067、1.099、1.122、1.130、1.139、1.140或1.142。满足上述条件式，能够合理配置第七透镜L7的面型，使第七透镜L7的面型不会过度弯曲或过于平缓，从而有利于降低第七透镜L7的公差敏感度，提升第七透镜L7的注塑成型良率；同时还有利于平衡光学***100的高级慧差，提升光学***100的成像质量。
在一些实施例中，光学***100满足条件式：3≤|f1/(f7+f8)|≤25；其中，f1为第一透镜L1的有效焦距，f7为第七透镜L7的有效焦距，f8为第八透镜L8的有效焦距。具体地，|f1/(f7+f8)|可以为：3.43、5.36、7.31、8.39、11.25、13.15、16.58、19.33、20.02或24.44。满足上述条件式，能够对第一透镜L1的有效焦距与第七透镜L7及第八透镜L8的有效焦距之和的比值进行合理配置，从而合理分配第一透镜L1、第七透镜L7及第八透镜L8的球差贡献，进而使得光学***100的轴上区域具有良好的成像质量。
在一些实施例中，光学***100满足条件式：1≤f67/f≤1.5；其中，f67为第六透镜L6与第七透镜L7的组合焦距，f为光学***100的有效焦距。具体地，f67/f可以为：1.00、1.05、1.09、1.11、1.15、1.18、1.20、1.25、1.27或1.31。满足上述条件式，能够对第六透镜L6与第七透镜L7的组合焦距以及光学***100的有效焦距的比值进行合理配置，使第六透镜L6与第七透镜L7的组合焦距在光学***100中不会过强，从而有利于校正光学***100的高阶球差，进而提升光学***100的成像质量。
在一些实施例中，光学***100满足条件式：0.35mm≤ET2≤0.5mm；其中，ET2为第二透镜L2的物侧面S3的最大有效孔径处至第二透镜L2的像侧面S4的最大有效孔径处于光轴110方向上的距离，即第二透镜L2的边缘厚度。具体地，ET2可以为：0.36、0.37、0.38、0.39、0.40、0.41、0.42或0.43，数值单位为mm。满足上述条件式，能够合理配置第二透镜L2的边缘厚度，从而有利于抑制光学***100的畸变，进而提升光学***100的成像质量；另外，还有利于使得第二透镜L2的面型不会过度弯曲或者过于平缓，有利于第二透镜L2的加工成型。
在一些实施例中，光学***100满足条件式：0.5≤|SAG61/CT6|≤1；其中，SAG61为第六透镜L6的物侧面S1的最大有效孔径处的矢高，即第六透镜L6的物侧面S1与光轴110的交点至第六透镜L6的物侧面S11的最大有效孔径处于光轴110方向上的距离，CT6为第六透镜L6于光轴110上的厚度，即第六透镜L6的中心厚度。具体地，|SAG61/CT6|可以为：0.60、0.62、0.63、0.65、0.68、0.70、0.74、0.75、0.76或0.77。满足上述条件式，能够对第六透镜L6的矢高及中心厚度的比值进行合理配置，从而有利于使得第六透镜L6的面型更加合理，进而降低第六透镜L6的公差敏感度，提升第六透镜L6的加工成型良率。
在一些实施例中，光学***100满足条件式：5≤|V4-V5|≤10；其中，V4为第四透镜L4在d线(587.56nm波长)下的阿贝数，V5为第五透镜L5在d线下的阿贝数。具体地，|V4-V5|可以为7.95。满足上述条件式，能够对第四透镜L4与第五透镜L5的阿贝数之差进行合理配置，有利于校正光学***100的色差，减小光学***100的二级光谱，从而提升光学***100的成像质量。
以上的有效焦距的参考波长均为555nm，阿贝数的参考波长均为587.56nm。
根据上述各实施例的描述，以下提出更为具体的实施例及附图予以详细说明。
第一实施例
请参见图1和图2，图1为第一实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑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。图2由左至右依次为第一实施例中光学***100的纵向球差、像散及畸变的曲线图，其中像散图和畸变图的参考波长为555nm，其他实施例相同。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凸面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凸面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
需要注意的是，在本申请中，当描述透镜的一个表面于近光轴110处(该表面的中心区域)为凸面时，可理解为该透镜的该表面于光轴110附近的区域为凸面。当描述透镜的一个表面于圆周处为凹面时，可理解为该表面在靠近最大有效半径处的区域为凹面。举例而言，当该表面于近光轴110处为凸面，且于圆周处也为凸面时，该表面由中心(该表面与光轴110的交点)至边缘方向的形状可以为纯粹的凸面；或者是先由中心的凸面形状过渡到凹面形状，随后在靠近最大有效半径处时变为凸面。此处仅为说明光轴110处与圆周处的关系而做出的示例，表面的多种形状结构(凹凸关系)并未完全体现，但其他情况可根据以上示例推导得出。
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以及第八透镜L8的材质均为塑料。
进一步地，光学***100满足条件式：ImgH 2/(TTL*FNO)＝2.51mm；其中，ImgH为光学***100的最大视场角所对应的像高的一半，TTL为第一透镜L1的物侧面S1至光学***100的成像面于光轴110上的距离，即光学***100的光学总长，FNO为光学***100的光圈数。满足上述条件式，能够对光学***100的半像高、光学总长及光圈数进行合理配置，有利于扩大光学***100的最大视场角，从而使光学***100能够获取更多的场景内容，丰富光学***100的成像信息；另外，也有利于光学***100实现大光圈的特性，提升光学***100的进光量，从而提升光学***100在弱光环境下的成像质量，并且能够使得光学***100具有更好的虚化效果，进而满足高成像质量的要求；再者，还有利于缩短光学***100的***总长，实现小型化设计。
光学***100满足条件式：f*tan(HFOV)＝5.41mm；其中，f为光学***100的有效焦距，HFOV为光学***100的最大视场角的一半。满足上述条件式，能够合理配置光学***100的有效焦距及最大半视场角，有利于缩短光学***100的***总长，满足小型化设计的需求；同时也有利于减小光线在光学***100中的偏折角度，从而使得光学***100中各透镜的面型不会过度弯折或过于平缓，有利于提升各透镜注塑成型的良率；再者，还有利于使得光学 ***100具备大像面特性，从而使光学***100能够匹配更大尺寸的感光元件，进而有利于提升光学***100的成像质量。
光学***100满足条件式：TTL/ImgH＝1.38。满足上述条件式，有利于缩短光学***100的***总长，满足小型化设计的要求；。
光学***100满足条件式：|R13+R14|/|R13-R14|＝1.121；其中，R13为第七透镜L7的物侧面S13于光轴110处的曲率半径，R14为第七透镜L7的像侧面S14于光轴110处的曲率半径。满足上述条件式，能够合理配置第七透镜L7的面型，使第七透镜L7的面型不会过度弯曲或过于平缓，从而有利于降低第七透镜L7的公差敏感度，提升第七透镜L7的注塑成型良率；同时还有利于平衡光学***100的高级慧差，提升光学***100的成像质量。
光学***100满足条件式：|f1/(f7+f8)|＝12.14；其中，f1为第一透镜L1的有效焦距，f7为第七透镜L7的有效焦距，f8为第八透镜L8的有效焦距。满足上述条件式，能够对第一透镜L1的有效焦距与第七透镜L7及第八透镜L8的有效焦距之和的比值进行合理配置，从而合理分配第一透镜L1、第七透镜L7及第八透镜L8的球差贡献，进而使得光学***100的轴上区域具有良好的成像质量。
光学***100满足条件式：f67/f＝1.24；其中，f67为第六透镜L6与第七透镜L7的组合焦距，f为光学***100的有效焦距。满足上述条件式，能够对第六透镜L6与第七透镜L7的组合焦距以及光学***100的有效焦距的比值进行合理配置，使第六透镜L6与第七透镜L7的组合焦距在光学***100中不会过强，从而有利于校正光学***100的高阶球差，进而提升光学***100的成像质量。
光学***100满足条件式：ET2＝0.40mm；其中，ET2为第二透镜L2的物侧面S3的最大有效孔径处至第二透镜L2的像侧面S4的最大有效孔径处于光轴110方向上的距离，即第二透镜L2的边缘厚度。满足上述条件式，能够合理配置第二透镜L2的边缘厚度，从而有利于抑制光学***100的畸变，进而提升光学***100的成像质量；另外，还有利于使得第二透镜L2的面型不会过度弯曲或者过于平缓，有利于第二透镜L2的加工成型。
光学***100满足条件式：|SAG61/CT6|＝0.75；其中，SAG61为第六透镜L6的物侧面S1的最大有效孔径处的矢高，CT6为第六透镜L6于光轴110上的厚度，即第六透镜L6的中心厚度。满足上述条件式，能够对第六透镜L6的矢高及中心厚度的比值进行合理配置，从而有利于使得第六透镜L6的面型更加合理，进而降低第六透镜L6的公差敏感度，提升第六透镜L6的加工成型良率。
光学***100满足条件式：|V4-V5|＝7.95；其中，V4为第四透镜L4在d线(587.56nm波长)下的阿贝数，V5为第五透镜L5在d线下的阿贝数。满足上述条件式，能够对第四透镜L4与第五透镜L5的阿贝数之差进行合理配置，有利于校正光学***100的色差，减小光学***100的二级光谱，从而提升光学***100的成像质量。
另外，光学***100的各项参数由表1给出。其中，表1中的像面S19可理解为光学***100的成像面。由物面(图未示出)至像面S19的各元件依次按照表1从上至下的各元件的顺序排列。表1中的Y半径为相应面序号的物侧面或像侧面于光轴110处的曲率半径。面序号S1和面序号S2分别为第一透镜L1的物侧面S1和像侧面S2，即同一透镜中，面序号较小的表面为物侧面，面序号较大的表面为像侧面。第一透镜L1的“厚度”参数列中的第一个数值为该透镜于光轴110上的厚度，第二个数值为该透镜的像侧面至像侧方向的后一表面于光轴110上的距离。
需要注意的是，在该实施例及以下各实施例中，光学***100也可不设置红外截止滤光片L9，但此时第八透镜L8的像侧面S16至像面S19的距离保持不变。
在第一实施例中，光学***100的有效焦距f＝6.14mm，光圈数FNO＝1.59，最大视场角FOV＝82.8°，光学总长TTL＝7.6mm。在第一实施例以及后续各实施例中，均满足关系式：7.55mm≤TTL≤7.6mm；FNO＝1.59；能够实现光学***的小型化设计以及大光圈设计。
且各透镜的焦距的参考波长为555nm，折射率和阿贝数的参考波长均为587.56nm(d线)， 其他实施例也相同。
表1
Figure PCTCN2021083858-appb-000001
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表2给出。其中，面序号从S1-S16分别表示像侧面或物侧面S1-S16。而从上到下的K-A20分别表示非球面系数的类型，其中，K表示圆锥系数，A4表示四次非球面系数，A6表示六次非球面系数，A8表示八次非球面系数，以此类推。另外，非球面系数公式如下：
Figure PCTCN2021083858-appb-000002
其中，Z为非球面上相应点到与表面顶点相切的平面的距离，r为非球面上相应点到光轴110的距离，c为非球面顶点的曲率，k为圆锥系数，Ai为非球面面型公式中与第i项高次项相对应的系数。
表2
Figure PCTCN2021083858-appb-000003
Figure PCTCN2021083858-appb-000004
另外，图2包括光学***100的纵向球面像差图(Longitudinal Spherical Aberration)，其表示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110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，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***100的场曲图(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***100的场曲较小，各视场的场曲和像散均得到了良好的校正，视场中心和边缘均拥有清晰的成像。图2还包括光学***100的畸变图(DISTORTION)，由图中可知，由主光束引起的图像变形较小，***的成像质量优良。
第二实施例
请参见图3和图4，图3为第二实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑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。图4由左至右依次为第二实施例中光学***100的纵向球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凸面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凸面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凸面，于圆周处为凸面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
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以及第八透镜L8的材质均为塑料。
另外，光学***100的各项参数由表3给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表3
Figure PCTCN2021083858-appb-000005
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表4给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表4
Figure PCTCN2021083858-appb-000006
Figure PCTCN2021083858-appb-000007
并且，根据上述所提供的各参数信息，可推得以下数据：
Figure PCTCN2021083858-appb-000008
另外，由图4中的像差图可知，光学***100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学***100拥有良好的成像品质。
第三实施例
请参见图5和图6，图5为第三实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑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。图6由左至右依次为第三实施例中光学***100的纵向球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凸面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凸面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凸面，于圆周处为凸面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
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以及第八透镜L8的材质均为塑料。
另外，光学***100的各项参数由表5给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表5
Figure PCTCN2021083858-appb-000009
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表6给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表6
Figure PCTCN2021083858-appb-000010
Figure PCTCN2021083858-appb-000011
并且，根据上述所提供的各参数信息，可推得以下数据：
Figure PCTCN2021083858-appb-000012
另外，由图6中的像差图可知，光学***100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学***100拥有良好的成像品质。
第四实施例
请参见图7和图8，图7为第四实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑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。图8由左至右依次为第四实施例中光学***100的纵向球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凸面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凹面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凸面，于圆周处为凸面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
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以及第八透镜L8的材质均为塑料。
另外，光学***100的各项参数由表7给出，且其中各参数的定义可由第一实施例得出， 此处不加以赘述。
表7
Figure PCTCN2021083858-appb-000013
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表8给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表8
Figure PCTCN2021083858-appb-000014
Figure PCTCN2021083858-appb-000015
并且，根据上述所提供的各参数信息，可推得以下数据：
Figure PCTCN2021083858-appb-000016
另外，由图8中的像差图可知，光学***100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学***100拥有良好的成像品质。
第五实施例
请参见图9和图10，图9为第五实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑STO、具有正屈折力的第一透镜L1、具有正屈折力的第二透镜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。图10由左至右依次为第五实施例中光学***100的纵向球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凸面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凸面，于圆周处为凹面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
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以及第八透镜L8的材质均为塑料。
另外，光学***100的各项参数由表9给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表9
Figure PCTCN2021083858-appb-000017
Figure PCTCN2021083858-appb-000018
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表10给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表10
Figure PCTCN2021083858-appb-000019
Figure PCTCN2021083858-appb-000020
并且，根据上述所提供的各参数信息，可推得以下数据：
Figure PCTCN2021083858-appb-000021
另外，由图10中的像差图可知，光学***100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学***100拥有良好的成像品质。
第六实施例
请参见图11和图12，图11为第六实施例中的光学***100的结构示意图，光学***100由物侧至像侧依次包括光阑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。图12由左至右依次为第六实施例中光学***100的纵向球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凸面，于圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于圆周处为凸面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凹面，于圆周处为凹面；
第三透镜L3的像侧面S6于近光轴110处为凸面，于圆周处为凸面；
第四透镜L4的物侧面S7于近光轴110处为凹面，于圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凸面，于圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凹面，于圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于圆周处为凸面；
第八透镜L8的物侧面S15于近光轴110处为凸面，于圆周处为凹面；
第八透镜L8的像侧面S16于近光轴110处为凹面，于圆周处为凸面。
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以及第八透镜L8的物侧面和像侧面均为非球面。
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以及第八透镜L8的材质均为塑料。
另外，光学***100的各项参数由表11给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表11
Figure PCTCN2021083858-appb-000022
Figure PCTCN2021083858-appb-000023
进一步地，光学***100各透镜像侧面或物侧面的非球面系数由表12给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表12
Figure PCTCN2021083858-appb-000024
Figure PCTCN2021083858-appb-000025
并且，根据上述所提供的各参数信息，可推得以下数据：
Figure PCTCN2021083858-appb-000026
另外，由图12中的像差图可知，光学***100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学***100拥有良好的成像品质。
请参见图13，在一些实施例中，光学***100可与感光元件210组装形成取像模组200。此时，感光元件210的感光面可视为光学***100的像面S19。取像模组200还可设置有红外截止滤光片L9，红外截止滤光片L9设置于第八透镜L8的像侧面S16与像面S19之间。具体地，感光元件210可以为电荷耦合元件(Charge Coupled Device，CCD)或互补金属氧化物半导体器件(Complementary Metal-Oxide Semiconductor Sensor，CMOS Sensor)。在取像模组200中采用上述光学***100，有利于实现广角特性以及大光圈特性，同时也有利于光学***100的小型化设计，从而有利于减小取像模组200的尺寸。
请参见图13和图14，在一些实施例中，取像模组200可运用于电子设备300中，电子设备包括壳体310，取像模组200设置于壳体310。具体地，电子设备300可以为但不限于便携电话机、视频电话、智能手机、电子书籍阅读器、行车记录仪等车载摄像设备或智能手表等可穿戴装置。当电子设备300为智能手机时，壳体310可以为电子设备300的中框。在电子设备300中采用取像模组200，有利于实现广角特性以及大光圈特性，同时也有利于光学***100的小型化设计，从而有利于减小电子设备300的尺寸。
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”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“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装置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。
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。
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。
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。
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。
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。
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。

Claims (20)

  1. 一种光学***，沿光轴由物侧至像侧依次包括：
    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；
    具有屈折力的第二透镜，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；
    具有屈折力的第三透镜；
    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；
    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；
    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凹面；
    具有正屈折力的第七透镜；以及
    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；
    且所述光学***满足以下条件式：
    2.5mm≤ImgH 2/(TTL*FNO)≤2.53mm；
    其中，ImgH为所述光学***的最大视场角所对应的像高的一半，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，FNO为所述光学***的光圈数。
  2. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    5.4mm≤f*tan(HFOV)≤5.5mm；
    其中，f为所述光学***的有效焦距，HFOV为所述光学***的最大视场角的一半。
  3. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    1.35≤TTL/ImgH≤1.4。
  4. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    1≤|R13+R14|/|R13-R14|≤1.2；
    其中，R13为所述第七透镜的物侧面于光轴处的曲率半径，R14为所述第七透镜的像侧面于光轴处的曲率半径。
  5. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    3≤|f1/(f7+f8)|≤25；
    其中，f1为所述第一透镜的有效焦距，f7为所述第七透镜的有效焦距，f8为所述第八透镜的有效焦距。
  6. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    1≤f67/f≤1.5；
    其中，f67为所述第六透镜与所述第七透镜的组合焦距，f为所述光学***的有效焦距。
  7. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    0.35mm≤ET2≤0.5mm；
    其中，ET2为所述第二透镜的物侧面的最大有效孔径处至所述第二透镜的像侧面的最大有效孔径处于光轴方向上的距离。
  8. 根据权利要求1所述的光学***，其特征在于，满足以下条件式：
    0.5≤|SAG61/CT6|≤1；
    其中，SAG61为所述第六透镜的物侧面的最大有效孔径处的矢高，CT6为所述第六透镜于光轴上的厚度。
  9. 根据权利要求1-8任一项所述的光学***，其特征在于，还包括红外截止滤光片，所述红外截止滤光片设置于所述第八透镜的像侧。
  10. 根据权利要求1-8任一项所述的光学***，其特征在于，所述光学***的各透镜的物侧面和像侧面均为非球面。
  11. 根据权利要求1-8任一项所述的光学***，其特征在于，所述光学***的各透镜的材质均为塑料。
  12. 根据权利要求1-8任一项所述的光学***，其特征在于，满足以下条件式：
    5≤|V4-V5|≤10；
    其中，V4为所述第四透镜在d线下的阿贝数，V5为所述第五透镜在d线下的阿贝数。
  13. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有负屈折力、所述第三透镜具有正屈折力、所述第四透镜具有负屈折力、所述第五透镜具有负屈折力、所述第六透镜具有负屈折力。
  14. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有负屈折力、所述第三透镜具有正屈折力、所述第四透镜具有正屈折力、所述第五透镜具有负屈折力、所述第六透镜具有负屈折力。
  15. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有负屈折力、所述第三透镜具有正屈折力、所述第四透镜具有负屈折力、所述第五透镜具有负屈折力、所述第六透镜具有正屈折力。
  16. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有负屈折力、所述第三透镜具有负屈折力、所述第四透镜具有正屈折力、所述第五透镜具有负屈折力、所述第六透镜具有负屈折力。
  17. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有正屈折力、所述第三透镜具有正屈折力、所述第四透镜具有负屈折力、所述第五透镜具有负屈折力、所述第六透镜具有负屈折力。
  18. 根据权利要求1-8任一项所述的光学***，其特征在于，所述第二透镜具有负屈折力、所述第三透镜具有正屈折力、所述第四透镜具有负屈折力、所述第五透镜具有正屈折力、所述第六透镜具有负屈折力。
  19. 一种取像模组，包括感光元件以及权利要求1-18任一项所述的光学***，所述感光元件设置于所述光学***的像侧。
  20. 一种电子设备，包括壳体以及权利要求19所述的取像模组，所述取像模组设置于所述壳体。
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