WO2024098911A1 - 一种光学镜头、摄像头模组及电子设备 - Google Patents

一种光学镜头、摄像头模组及电子设备 Download PDF

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Publication number
WO2024098911A1
WO2024098911A1 PCT/CN2023/116326 CN2023116326W WO2024098911A1 WO 2024098911 A1 WO2024098911 A1 WO 2024098911A1 CN 2023116326 W CN2023116326 W CN 2023116326W WO 2024098911 A1 WO2024098911 A1 WO 2024098911A1
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WIPO (PCT)
Prior art keywords
lens
optical
lens group
optical lens
image side
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PCT/CN2023/116326
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English (en)
French (fr)
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WO2024098911A9 (zh
Inventor
李阳
王新权
Original Assignee
荣耀终端有限公司
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Application filed by 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Priority to EP23841579.8A priority Critical patent/EP4398020A1/en
Publication of WO2024098911A1 publication Critical patent/WO2024098911A1/zh
Publication of WO2024098911A9 publication Critical patent/WO2024098911A9/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements

Definitions

  • the present application relates to the technical field of electronic equipment, and in particular to an optical lens, a camera module and an electronic equipment.
  • the embodiments of the present application provide an optical lens, a camera module and an electronic device, which are used to provide an optical lens that can well balance telephoto characteristics and high imaging quality.
  • an embodiment of the present application provides an optical lens, comprising: a first lens group, a second lens group, and a third lens group arranged from the object side to the image side, the first lens group having positive optical power, the second lens group having negative optical power, and the third lens group having optical power; wherein the effective focal length fg1 of the first lens group and the effective focal length f of the optical lens satisfy: 0.65 ⁇ fg1/f ⁇ 5.6.
  • the effective focal length fg1 of the first lens group and the effective focal length f of the optical lens satisfy: fg1/f ⁇ 1.
  • the optical power of the first lens group, the second lens group and the third lens group can be further balanced, spherical aberration can be well corrected, and the imaging quality can be further improved.
  • the effective focal length fg2 of the second lens group and the effective focal length f of the optical lens satisfy: -3.5 ⁇ fg2/f ⁇ 0.
  • the total optical length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL/f ⁇ 2.1.
  • an entrance pupil diameter EPD of the optical lens and an effective focal length f of the optical lens satisfy: f/EPD ⁇ 2.1.
  • the optical lens can increase the maximum light throughput of the optical system and improve the imaging performance on the basis of the telephoto characteristics. In other words, even in darker environments, clear imaging can be achieved.
  • a distance AT12 between the first lens group and the second lens group on the optical axis and a distance AT23 between the second lens group and the third lens group on the optical axis satisfy: 0.1 ⁇ AT12/AT23 ⁇ 4.76.
  • the sensitivity of the spacing between the lens groups to the field curvature can be effectively reduced, and the field curvature of the optical lens can be effectively corrected.
  • the second lens group and the third lens group each include a plurality of lenses; a sum of center thicknesses ct2 of the lenses in the second lens group and a sum of center thicknesses ct3 of the lenses in the third lens group satisfy: ct2/ct3 ⁇ 1.3.
  • the degree to which the performance of the optical lens, such as distortion and field curvature, is affected by the thinning of one or more lenses in the second lens group and the third lens group can be effectively reduced.
  • the third lens group includes four lenses, among which, along the object side to the image side, the first lens and the fourth lens both have optical focal power, the second lens has negative optical focal power, and the third lens has positive optical focal power; the sum of the effective focal lengths f ⁇ of the third lens and the fourth lens and the effective focal length fg2 of the second lens group satisfy: -1.2 ⁇ fg2/f ⁇ 8.5.
  • the positive and negative spherical aberrations of the first lens group, the second lens group and the third lens group can offset each other, thereby improving the imaging quality; at the same time, it is also beneficial to shorten the length of the optical lens, thereby realizing the miniaturization design of the optical lens.
  • a sum of the radii of curvature R2 of the object side surface and the image side surface of the second lens in the third lens group and a sum of the radii of curvature R3 of the object side surface and the image side surface of the third lens in the third lens group satisfy: -1.5 ⁇ R2/R3 ⁇ 12.5.
  • the deflection angle of the light at the edge of the third lens group can be effectively controlled, that is, the light passing through the third lens group at the circumference will not be deflected too much toward the optical axis or the edge, so that the light passing through the third lens group at the circumference is relatively smooth, so that the beam diameter is effectively controlled, and the size of the fourth lens of the third lens group in the direction perpendicular to the optical axis is effectively controlled, thereby shortening the size of the optical lens in the direction perpendicular to the optical axis; on the other hand, the lenses of the third lens group will not be too thin and are easy to process.
  • the second lens group is movable relative to the first lens group along a direction perpendicular to the optical axis.
  • the optical lens has an optical image stabilization function, thereby improving the imaging quality.
  • the second lens group includes two lenses, the two lenses are cemented together, and the two lenses are spherical lenses.
  • the second lens group is formed by gluing two spherical lenses together, so that the second lens group is easy to process and chromatic aberration and spherical aberration are effectively eliminated.
  • the first lens group includes a curved prism
  • the curved prism includes an incident surface, an exit surface, and a reflective surface
  • the angle between the reflective surface and the exit surface is an acute angle
  • the incident surface is connected between the reflective surface and the exit surface
  • the incident surface is a convex surface
  • the incident light can be deflected after passing through the prism, thereby effectively shortening the length of the optical lens, which is beneficial to the miniaturization of the optical lens;
  • the incident surface is designed to be a convex surface, that is, it is convex toward the object side, which is beneficial to increase the aperture of the optical lens and achieve a large aperture, so that the optical lens can correct aberrations well when it is relatively small and thin, thereby improving the imaging quality.
  • the incident surface is an aspherical surface.
  • the size of the optical lens along the optical axis is reduced, which is further beneficial to increase the aperture of the optical lens and achieve a large aperture, so that the optical lens can correct aberrations well in a relatively small and thin case, thereby improving the imaging quality.
  • the curved prism is a glass prism
  • the first lens group further includes at least one lens disposed on the image side of the exit surface, and among the at least one lens, the lens closest to the curved prism is a spherical lens.
  • the lens closest to the curved prism as a spherical lens, it is helpful to reduce the difficulty of processing, and it is convenient for the lens to be glued to the image side surface of the curved prism when necessary, thereby effectively eliminating chromatic aberration and spherical aberration.
  • an embodiment of the present application provides a camera module, comprising a photosensitive element and the optical lens described in the first aspect, wherein the photosensitive element is arranged on the image side of the optical lens.
  • the camera module in the embodiment of the present application has the same technical effect as that achieved by the optical lens in the first aspect, which will not be described in detail here.
  • an embodiment of the present application provides an electronic device, comprising a housing, and the camera module described in the second aspect, wherein the camera module is mounted on the housing.
  • the electronic device in the embodiment of the present application has the same technical effect as that achieved by the camera module in the second aspect, which will not be repeated here.
  • FIG1 is a schematic diagram of the structure of an electronic device in some embodiments of the present application.
  • Fig. 2 is a cross-sectional view of A-A in Fig. 1;
  • FIG3 is a schematic diagram of the structure of an optical lens in a first embodiment of the present application.
  • FIG4 is a schematic structural diagram of an optical lens in which the second lens group in FIG3 moves in one direction;
  • FIG5 is a schematic diagram of the structure of the optical lens in which the second lens group in FIG3 moves in another direction;
  • FIG6 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the first embodiment of the present application;
  • FIG6 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the first embodiment of the present application.
  • FIG6 c is a third simulation effect diagram (distortion diagram) of the optical lens in the first embodiment of the present application.
  • FIG7 is a schematic diagram of the structure of an optical lens in a second embodiment of the present application.
  • FIG8 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the second embodiment of the present application;
  • FIG8 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the second embodiment of the present application.
  • FIG8c is a third simulation effect diagram (distortion diagram) of the optical lens in the second embodiment of the present application.
  • FIG9 is a schematic diagram of the structure of an optical lens in a third embodiment of the present application.
  • FIG10 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the third embodiment of the present application;
  • FIG10 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the third embodiment of the present application.
  • FIG10c is a third simulation effect diagram (distortion diagram) of the optical lens in the third embodiment of the present application.
  • FIG11 is a schematic diagram of the structure of an optical lens in a fourth embodiment of the present application.
  • FIG12a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the fourth embodiment of the present application;
  • FIG12 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the fourth embodiment of the present application.
  • FIG12c is a third simulation effect diagram (distortion diagram) of the optical lens in the fourth embodiment of the present application.
  • FIG13 is a schematic diagram of the structure of an optical lens in a fifth embodiment of the present application.
  • FIG14a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the fifth embodiment of the present application.
  • FIG14 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the fifth embodiment of the present application.
  • FIG14c is a third simulation effect diagram (distortion diagram) of the optical lens in the fifth embodiment of the present application.
  • FIG15 is a schematic diagram of the structure of an optical lens in a sixth embodiment of the present application.
  • FIG16 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the sixth embodiment of the present application;
  • FIG16 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the sixth embodiment of the present application.
  • FIG16c is a third simulation effect diagram (distortion diagram) of the optical lens in the sixth embodiment of the present application.
  • FIG17 is a schematic diagram of the structure of an optical lens in a seventh embodiment of the present application.
  • FIG18 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the seventh embodiment of the present application;
  • FIG18 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the seventh embodiment of the present application.
  • FIG18c is a third simulation effect diagram (distortion diagram) of the optical lens in the seventh embodiment of the present application.
  • FIG19 is a schematic structural diagram of an optical lens in an eighth embodiment of the present application.
  • FIG20 a is a simulation effect diagram 1 (axial spherical aberration diagram) of the optical lens in the eighth embodiment of the present application.
  • FIG20 b is a second simulation effect diagram (field curvature diagram) of the optical lens in the eighth embodiment of the present application.
  • FIG. 20 c is a third simulation effect diagram (distortion diagram) of the optical lens in the eighth embodiment of the present application.
  • Focal power is equal to the difference between the convergence of the image-side light beam and the convergence of the object-side light beam. It characterizes the ability of an optical lens to deflect light.
  • a lens or lens group with positive optical power has a positive focal length and has the effect of converging light.
  • a lens or lens group with negative optical power has a negative focal length and has the effect of diverging light.
  • Focal length also known as focal length, is a measure of the convergence or divergence of light in an optical lens. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through the lens or lens group. From a practical point of view, it can be understood as the distance from the center of the lens to the plane when the object is infinitely far away. For a fixed-focus lens, the position of its optical center is fixed; for a telephoto lens, the change of the optical center of the lens brings about a change in the focal length of the lens.
  • the effective focal length (EFL) of a lens refers to the distance from the center of the lens to the focus.
  • the object side is bounded by the lens.
  • the side where the object is located is called the object side, and the surface of the lens close to the object side is called the object side.
  • the image side is bounded by the lens.
  • the side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side.
  • the aperture is a device used to control the amount of light that passes through the lens and enters the photosensitive surface inside the camera body. It is usually inside the lens.
  • Aperture value also known as F number (FNO) is a relative value obtained by dividing the focal length of the lens by the diameter of the lens entrance pupil (the inverse of the relative aperture). The smaller the aperture value, the more light enters in the same unit time. The larger the aperture value, the smaller the depth of field, and the background content of the photo will be blurred, similar to the effect of a telephoto lens.
  • FNO F number
  • Total track length refers to the total length from the surface of the lens closest to the object side to the imaging surface. TTL is the main factor in determining the height of the camera.
  • the imaging plane is located on the image side of all lenses in the optical lens, and is the plane on which the image is formed after light passes through each lens in the optical lens in sequence.
  • the optical axis is an axis that passes vertically through the center of the lens.
  • the optical axis of the lens is the axis that passes through the center of each lens of the lens.
  • Focus is the point where parallel light rays converge after being refracted by a lens or lens group.
  • the image focal plane also called the back focal plane or the second focal plane, is a plane passing through the image focus (also called the back focus or the second focus) and perpendicular to the optical axis of the system.
  • the Abbe number, or dispersion coefficient is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.
  • An optical lens has the properties of an ideal optical system at the optical axis.
  • the near-axis light emitted from a point on the object intersects the image plane at one point (also known as the optical axis image point).
  • the light rays that actually pass through the lens with different apertures are difficult to intersect perfectly at one point, but have a certain deviation from the position of the near-axis image point. These differences are collectively called aberrations.
  • Axial chromatic aberration (longitudinal spherical aberration), also known as longitudinal chromatic aberration or position chromatic aberration or axial aberration, is a beam of light parallel to the optical axis that converges at different positions before and after passing through the lens. This aberration is called position chromatic aberration or axial chromatic aberration. This is because the positions of the images of the light of each wavelength are different, so that the focal planes of the image side of the light of different colors cannot overlap when the final image is formed, and the complex light spreads out to form dispersion.
  • Distortion also known as distortion
  • Distortion is the degree of distortion of the image formed by an optical lens relative to the object itself. Distortion is due to the influence of aperture spherical aberration.
  • the height of the intersection of the main light of different fields of view with the Gaussian image plane after passing through the optical lens is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.
  • Astigmatism because the object point is not on the optical axis of the optical lens, the light beam it emits has an inclination angle with the optical axis. After the light beam is refracted by the lens, the convergence point of its meridional beamlet and sagittal beamlet is not at the same point. That is, the light beam cannot be focused on one point, and the image is not clear, so astigmatism occurs.
  • Meridian beamlet and sagittal beamlet are the names of light beams in two vertical planes in a rotationally symmetric optical lens.
  • Meridian plane The plane formed by the chief ray (main light beam) of an object point outside the optical axis and the optical axis is called the meridian plane.
  • Sagittal plane The plane that passes through the main ray (main light beam) of the object point outside the optical axis and is perpendicular to the meridian plane is called the sagittal plane.
  • Field curvature (curvature of field) is used to indicate the difference between the clearest image point position of the non-central field of view after the optical lens group and the clearest image point position of the central field of view on the optical axis.
  • the lens has field curvature, the intersection point of the entire light beam does not coincide with the ideal image point.
  • the entire image plane is a curved surface.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features.
  • plural means two or more.
  • an embodiment of the present application provides an electronic device 100, including a housing 20 and a camera module 10, wherein the camera module 10 is mounted on the housing 20, and the camera module 10 includes an optical lens 1 and a photosensitive element 2, wherein the photosensitive element 2 is arranged on the image side of the optical lens 1.
  • the electronic device 100 may be a mobile phone, a tablet computer, a laptop computer, a wearable device, or other device with a photo or video recording function. In this embodiment, the electronic device 100 is described by taking a mobile phone as an example.
  • the electronic device 100 includes a housing 20, a display screen 30, and a camera module 10.
  • the housing 20 includes a frame 21 and a back cover 22.
  • the frame 21 and the back cover 22 may be an integrally formed structure, or may be assembled to form an integral structure.
  • the display screen 30 and the back cover 22 are respectively mounted on both sides of the frame 21, and together enclose a receiving space 201, in which the camera module 10 is received.
  • the electronic device 100 further includes a processor (not shown in the figure), and the processor is housed in the accommodating space 201.
  • the processor is communicatively connected to the camera module 10, and the processor is used to obtain image data from the camera module 10, process the image data, and then transmit the processed signal to the display.
  • the communication connection between the camera module 10 and the processor may include data transmission through electrical connection methods such as wiring, and data transmission may also be achieved through coupling and other methods. It is understandable that the camera module 10 and the processor may also be communicatively connected through other methods that can achieve data transmission.
  • a camera hole is provided on the back cover 22, and the camera module 10 collects light through the camera hole, and the camera module 10 serves as a rear camera of the electronic device 100.
  • the camera module 10 in this application can be installed in the upper left corner, the middle of the upper part, or the upper right corner of the back of the electronic device 100, which is not specifically limited here.
  • the camera module 10 can also be used as a front camera of the electronic device 100, which is not specifically limited here.
  • the camera module 10 can also be detachably connected to the electronic device 100 through an auxiliary component.
  • the auxiliary component can be rotated or moved relative to the electronic device 100, and the auxiliary component and the electronic device 100 can be detachably connected by means of screw connection, snap connection, etc., which are not specifically limited here.
  • the camera module 10 includes an optical lens 1, a photosensitive element 2, and a filter 3.
  • the photosensitive element 2 is located on the image side of the optical lens 1.
  • the filter 3 can be located between the optical lens 1 and the photosensitive element 2, so that light can pass through the optical lens 1 and illuminate the photosensitive surface of the photosensitive element 2.
  • the working principle of the camera module 10 is as follows: the light reflected by the photographed scene is projected through the optical lens 1 to generate an optical image. The light is incident on the photosensitive surface of the photosensitive element 2, and the photosensitive element 2 converts the optical image into an electrical signal, namely an analog image signal, and transmits it to the processor.
  • the photosensitive element 2 (also called an image sensor) is a semiconductor chip, which contains hundreds of thousands to millions of photodiodes on its surface. When exposed to light, it will generate electric charge.
  • the photosensitive element 2 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). CCD is made of a highly sensitive semiconductor material that can convert light into electric charge.
  • CMOS complementary metal oxide semiconductor
  • the charge coupled device is composed of many photosensitive units, usually in units of millions of pixels. When the surface of the photosensitive element 2 is exposed to light, each photosensitive unit will reflect the charge on the component, and the signals generated by all the photosensitive units are added together to form a complete picture.
  • the filter 3 is used to filter out unnecessary wavelengths in the light, to prevent the photosensitive element 2 from generating false colors or ripples, so as to improve its effective resolution and color reproduction.
  • the filter 3 may be an infrared filter, wherein the filter 3 in this embodiment is an independent component, and the filter 3 structure may also be eliminated, and filtering may be achieved by attaching a filter film layer or using a filter material on at least one surface of one of the lenses or prisms of the optical lens 1, which is not specifically limited here.
  • the optical lens 1 mainly uses the refraction principle of the lens to form an image, that is, the light of the scene passes through the optical lens 1 to form a clear image on the focal plane, and the image of the scene is recorded by the photosensitive element 2 located on the focal plane.
  • the optical lens 1 can be a vertical lens or a periscope lens. This embodiment is described by taking the optical lens 1 as a periscope lens as an example.
  • the optical lens 1 is a periscope lens
  • the longitudinal dimension of the optical lens 1 along the optical axis can be effectively reduced.
  • the optical lens 1 is placed in the accommodating space 201 of the housing 20, the space dimension of the accommodating space 201 along the thickness direction of the electronic device 100 is occupied, so that it is better suitable for use in thin electronic devices 100.
  • FIG. 3 to 5 shows the structure diagram and simulation effect diagram of the optical lens 1 in the camera module 10 in the first embodiment.
  • the optical lens 1 includes a first lens group G1, a second lens group G2, and a third lens group G3 arranged from the object side to the image side, the first lens group G1 has positive focal power, the second lens group G2 has negative focal power, and the third lens group G3 has negative focal power.
  • the optical lens 1 By reasonably controlling the effective focal length fg1 of the first lens group G1 and the effective focal length f of the optical lens 1, it is beneficial to balance the negative focal power of the effective focal length fg1 of the first lens group G1 and the effective focal length fg2 of the second lens group G2, so that the optical lens 1 has a telephoto characteristic, and the purpose of reducing aberrations and improving imaging quality is achieved.
  • the first lens group G1 of the optical lens 1 includes a curved prism
  • the curved prism of the optical lens 1 includes an incident surface S1, an exit surface S3 and a reflective surface S2
  • the angle between the reflective surface S2 of the optical lens 1 and the exit surface S3 of the optical lens 1 is an acute angle
  • the incident surface S1 of the optical lens 1 is connected between the reflective surface S2 of the optical lens 1 and the exit surface S3 of the optical lens 1
  • the incident surface S1 of the optical lens 1 is a convex surface.
  • the incident light can be deflected after being reflected by the reflective surface S2 of the curved prism, thereby effectively shortening the length of the optical lens, which is beneficial to the miniaturization of the optical lens;
  • the incident surface is designed to be convex, that is, it is convex toward the object side, which is beneficial to increase the aperture of the optical lens and achieve a large aperture, so that the optical lens can correct aberrations well when it is relatively small and thin, thereby improving the imaging quality.
  • the curved prism in the embodiment of the present application can be an integrally formed special-shaped triangular prism, such as a special-shaped right-angle triangular prism with a curved surface, which can deflect the incident light by 90°, so that the optical lens 1 has a telephoto characteristic and effectively shortens the length of the optical lens 1 along the optical axis, as shown in the lateral size of FIG. 3, which is conducive to miniaturization of the optical lens 1.
  • the optical lens 1 is designed to be disposed in the storage space 201 of the electronic device 100 with limited thickness, thereby reducing the thickness of the electronic device 100, so that the electronic device 100 is made thinner and lighter.
  • the curved prism can also be glued or combined with a lens and a right-angle prism to form the prism with positive focal length.
  • the materials of the right-angle prism and the lens can be the same or different, and the design is selected according to actual conditions, and no specific limitation is made here.
  • a straight-through lens with positive optical power may also be used, which is not specifically limited here.
  • the first lens group G1 can also be combined with the optical focal length and telephoto characteristics of the optical lens 1 to set only one lens, multiple lenses on the image side of the curved prism, or no lens behind the curved prism. No specific limitation is made here.
  • the incident surface S1 is an aspherical surface.
  • the size of the optical lens 1 along the optical axis is reduced, which is further conducive to increasing the aperture of the optical lens 1 and achieving a large aperture, so that the optical lens 1 can correct aberrations well in a relatively small and thin case, thereby improving the imaging quality.
  • the curved prism of the optical lens 1 is a glass prism
  • the first lens group G1 of the optical lens 1 further includes at least one lens disposed on the image side of the exit surface of the optical lens 1 , and among the at least one lens of the optical lens 1 , the lens closest to the curved prism of the optical lens 1 is a spherical lens.
  • the lens closest to the curved prism as a spherical lens, it is helpful to reduce the difficulty of processing, so that the lens can be glued to the image side of the curved prism when necessary, thereby effectively eliminating chromatic aberration and spherical aberration and improving imaging quality.
  • the first lens group G1 includes a lens 1 L1 with positive focal power, that is, the above-mentioned curved prism, a lens 2 L2 with negative focal power, and a lens 3 L3 with positive focal power.
  • the lens 2 L2 is a glass spherical lens.
  • the glass spherical lens has a high refractive index, a high Abbe number, and is easy to process and shape
  • the lens 2 L2 close to the curved prism to be made of the same glass as the curved prism, it is convenient to glue the lens 2 L2 to the object side of the curved prism to eliminate the chromatic aberration and spherical aberration of the optical lens 1, so that the optical lens 1 has a higher imaging quality and a low control cost.
  • the lens 2 L2 glues the lens 2 L2 to the lens 1 L1, that is, the object side of the above-mentioned curved prism, to eliminate the chromatic aberration and spherical aberration of the first lens group G1, thereby reducing the aberration of the optical lens 1 as a whole and improving the imaging quality.
  • the lens 2 L2 can also be designed to be other light-transmitting materials, such as resin or synthetic materials, so that the weight of the optical lens 1 is relatively light.
  • the shape parameters and materials of the lens 2 L2 can be selected and designed according to actual conditions and are not specifically limited here.
  • lens three L3 can be glass or other light-transmitting materials, such as resin or synthetic materials.
  • the shape parameters and materials of lens three L3 can be selected and designed according to actual conditions and are not specifically limited here.
  • the second lens group G2 of the optical lens 1 and the third lens group G3 of the optical lens 1 both include a plurality of lenses.
  • the reasonable layout of the plurality of lenses of the second lens group G2 and the third lens group G3 is conducive to the reasonable distribution of the focal length of the optical lens 1, and is balanced with the focal length of the first lens group G1, taking into account the telephoto characteristics, high imaging quality, and miniaturization of the optical lens 1.
  • the second lens group G2 includes two lenses, the two lenses of the optical lens 1 are cemented together, and the two lenses in the second lens group G2 of the optical lens 1 are both glass spherical lenses. Because glass has a high refractive index and Abbe number, it can eliminate chromatic aberration and improve imaging quality, and glass spherical lenses are easy to process.
  • the two lenses of the second lens group G2 can be processed and assembled, such as glued, with high precision and low cost.
  • the refractive indexes of the two lenses in the second lens group G2 may be the same or different.
  • the two lenses in the second lens group G2 may also be spherical lenses made of different materials, or a plurality of lenses may be selected according to actual conditions to form a second lens group G2 with negative optical power to balance the positive optical power of the first lens group G1. No specific limitation is made here.
  • optical image stabilization is particularly important for the quality of the film of the miniaturized telephoto lens.
  • the second lens group G2 of the optical lens 1 can move relative to the first lens group G1 of the optical lens 1 in a direction perpendicular to the optical axis, that is, the second lens group G2 can move in the longitudinal direction in FIG. 2 .
  • This enables the optical lens 1 to have an optical image stabilization function, that is, when the user's hand shakes when taking a photo, the optical lens 1 can offset the light deviation caused by the hand shake in this direction through the movement of the second lens group G2, thereby improving the quality of the film.
  • optical image stabilization mainly compensates for camera shake through the movement of the lens. It relies on the camera's built-in precision gyroscope and a group of movable lenses, such as the second lens group G2 in this embodiment.
  • the precision gyroscope can accurately detect hand shake and convert it into an electrical signal. After passing through the built-in processor of the lens, it controls the movement of the second lens group G2 to correct the light deviation caused by hand shake, avoid blur, and thus improve the quality of the film.
  • the anti-shake effect can also be achieved through high-sensitivity technology.
  • the principle of high-sensitivity technology is relatively simple, that is, by increasing the ISO value to increase the shutter speed and thus achieve the anti-shake effect.
  • Optical anti-shake and high-sensitivity can also be combined to make the optical lens 1 have a dual anti-shake function, further improving the quality of the film, which is not specifically limited here.
  • the third lens group G3 of the optical lens 1 includes four lenses, namely lens five L5, lens six L6, lens seven L7, and lens eight L8.
  • the first lens that is, lens five L5 in the third lens group G3 and the fourth lens, that is, lens eight L8 in the third lens group G3 both have optical focal power
  • the second lens that is, lens six L6 in the third lens group G3 has negative optical focal power
  • the third lens that is, lens seven L7 in the third lens group G3 has positive optical focal power.
  • the optical lens 1 includes a lens 1 L1 with positive focal power, a lens 2 L2 with negative focal power, a lens 3 L3 with positive focal power, a lens 4 L4 with negative focal power, a lens 5 L5 with positive focal power, a lens 6 L6 with negative focal power, a lens 7 L7 with positive focal power, and a lens 8 L8 with negative focal power, which are arranged from the object side to the image side.
  • Lens 1 L1 includes an object side surface S1, a reflection surface S2 and an image side surface S3
  • Lens 2 L2 includes an object side surface S4 and an image side surface S5
  • Lens 3 L3 includes an object side surface S6 and an image side surface S7
  • Lens 4 L4 includes two object side surfaces S8, S10 and two image side surfaces S9, S11.
  • the object side surfaces and the image side surfaces are arranged alternately along the optical axis
  • Lens 5 L5 includes an object side surface S12 and an image side surface S13
  • Lens 6 L6 includes an object side surface S14 and an image side surface S15
  • Lens 7 L7 includes an object side surface S16 and an image side surface S17
  • Lens 8 L8 includes an object side surface S18 and an image side surface S19.
  • the camera module 10 also has a virtual imaging surface and an aperture STO.
  • the imaging surface is located on the image side of lens 8 L8, and the aperture STO is located on the first object side of the second lens group G2.
  • the side surface is the object side surface S8 of the lens 24 L4.
  • the imaging surface of the camera module 10 coincides with the photosensitive surface of the photosensitive element 2.
  • the object side and image side of the lens can be divided radially from the center of the surface into areas at the optical axis and at the circumference.
  • a surface of a lens as convex at the optical axis (the central area of the surface)
  • the area of the surface of the lens near the optical axis is convex.
  • the area of the surface near the maximum effective radius is concave.
  • the shape of the surface from the center (optical axis) to the edge direction can be a pure convex surface, or it first transitions from the convex shape of the center to the concave shape, and then becomes convex when approaching the maximum effective radius.
  • the various shape structures (convex-concave relationship) of the surface are not fully reflected, but other situations in some embodiments can be deduced based on the above examples, which will not be repeated here.
  • the object side surface S1 of the lens 1 L1 is convex toward the image side at the optical axis (referred to as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (referred to as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is a plane at the optical axis, and the image side surface S5 is a convex surface at the optical axis; the object side surface S4 is a plane at the circumference, and the image side surface S5 is a convex surface at the circumference.
  • the object side surface S6 of the third lens L3 is a convex surface at the optical axis, and the image side surface S7 is a concave surface at the optical axis; the object side surface S6 is a convex surface at the circumference, and the image side surface S7 is a concave surface at the circumference.
  • the object side surface S8 of the fourth lens L4 is a concave surface at the optical axis, and the image side surface S11 is a convex surface at the optical axis; the object side surface S8 is a concave surface at the circumference, and the image side surface S11 is a convex surface at the circumference.
  • the object side surface S12 of the fifth lens L5 is a convex surface at the optical axis, and the image side surface S13 is a concave surface at the optical axis; the object side surface S12 is a convex surface at the circumference, and the image side surface S13 is a concave surface at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is convex at the optical axis, and the image side surface S17 is concave at the optical axis, the object side surface S16 is convex at the circumference, and the image side surface S17 is concave at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Figure 6b and Figure 6c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the first embodiment of the present application, and the reference wavelength of the astigmatism diagram and distortion diagram of the following embodiments (the first embodiment to the eighth embodiment) is 546nm.
  • the following combines the data of the main parameters of the optical lens 1 and the results of the simulation effect diagram to present the parameters such as the radius of curvature, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 in the camera module 10 in the first embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses, and the dispersion coefficient, that is, the Abbe number.
  • Table 1b shows the aspheric coefficients of each lens in the first embodiment.
  • the radius of curvature in Table 1a is the radius of curvature of the lens with the corresponding surface number, that is, the object side or image side of the lens corresponding to each surface number at the optical axis.
  • the "infinity" in the "radius of curvature” parameter series of the lens means that the object side or image side of the lens is a plane;
  • the first value of each lens in the "thickness” parameter series is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the object side of the next lens on the optical axis;
  • the value of the aperture STO in the "thickness” parameter series is the distance from the center of the aperture STO to the object side of the next lens on the optical axis. Distance on axis.
  • the aspherical surface of the optical lens 1 in the following embodiments can be defined by, but not limited to, the following aspherical surface curve equation:
  • z is the relative distance between a point on the aspheric surface with a distance r from the optical axis and the tangent plane tangent to the optical axis of the aspheric surface; r is the vertical distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the cone coefficient; ⁇ i is the i-th order aspheric coefficient, which can be found in Table 1b.
  • the effective focal length f of the optical lens 1 is 14.95 mm
  • the combined focal length fg1 of the first lens group G1 is 84.39 mm
  • the effective focal length fg2 of the second lens group G2 is -40.82 mm
  • the aperture FNO is 2.0
  • the field of view FOV is 27.2°
  • the total optical length TTL of the optical lens 1 is 25.63 mm.
  • the parameters of the optical lens 1 in the first embodiment satisfy the relationship shown in Table 1c.
  • f is the effective focal length of optical lens 1, which is equal to the EFL value of optical lens 1;
  • fg1 is the effective focal length of the first lens group G1, that is, the combined focal length of lens 1 L1, lens 2 L2 and lens 3 L3 in the first lens group G1;
  • fg2 is the effective focal length of the second lens group G2, that is, the focal length of the lens four L4;
  • TTL is the total optical length, which refers to the distance from the first surface in the optical lens 1 to the image plane;
  • AT12 is the distance between the first lens group G1 and the second lens group G2 on the optical axis, which refers to the distance between the third lens L3 and the fourth lens L4 on the optical axis;
  • AT23 is the distance between the second lens group G2 and the third lens group G3 on the optical axis, which refers to the fourth lens L4 and The distance of lens five L5 on the optical axis;
  • EPD is the entrance pupil diameter of the optical lens 1, also called the entrance pupil aperture
  • the ratio of f/EPD is equal to the aperture FNO, which is used to determine the brightness of the optical lens 1.
  • the aperture FNO is 2.8, and the aperture FNO in this application is 2.01, which increases the aperture of the optical lens 1 and improves the imaging quality;
  • R2 is the sum of the curvature radii of the object side surface and the image side surface of the second lens in the third lens group G3, that is, the sum of the curvature radii of the object side surface and the image side surface of the lens six L6;
  • R3 is the sum of the curvature radii of the object side surface and the image side surface of the third lens in the third lens group G3, that is, the sum of the curvature radii of the object side surface and the image side surface of the seventh lens L7;
  • the axial spherical aberration diagram in FIG6a represents the deviation of the convergence focus of light of different wavelengths at the optical axis after passing through the optical lens 1 from the ideal image plane.
  • the ordinate of the axial spherical aberration diagram represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the center of the pupil to the edge of the pupil, and the abscissa represents the deviation distance (in mm) between the convergence image plane of the light and the ideal image plane.
  • the degree of deviation of the convergence focus of light of each wavelength and the deviation from the ideal image plane of the optical lens 1 in the first embodiment are within a very small range, and the spherical aberration in the imaging picture is well corrected; wherein, the X curve in the field curvature diagram in FIG6b represents the sagittal field curvature, and the Y curve represents the meridian field curvature.
  • the optical lens 1 in the first embodiment achieves the purpose of long focus characteristics and high imaging quality.
  • FIG. 7 , FIG. 8 a , FIG. 8 b , and FIG. 8 c show a schematic structural diagram of the optical lens 1 in the camera module 10 in the second embodiment and a simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with negative focal power, a lens three L3 with positive focal power, a lens four L4 with negative focal power, a lens five L5 with positive focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with negative focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is a plane at the optical axis, and the image side surface S5 is a convex surface at the optical axis; the object side surface S4 is a plane at the circumference, and the image side surface S5 is a convex surface at the circumference.
  • the object side surface S6 of the third lens L3 is a convex surface at the optical axis, and the image side surface S7 is a concave surface at the optical axis; the object side surface S6 is a convex surface at the circumference, and the image side surface S7 is a concave surface at the circumference.
  • the object side surface S8 of the fourth lens L4 is a concave surface at the optical axis, and the image side surface S11 is a convex surface at the optical axis; the object side surface S8 is a concave surface at the circumference, and the image side surface S11 is a convex surface at the circumference.
  • the object side surface S12 of the fifth lens L5 is a convex surface at the optical axis, and the image side surface S13 is a convex surface at the optical axis; the object side surface S12 is a convex surface at the circumference, and the image side surface S13 is a convex surface at the circumference.
  • the object side surface S14 of lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of lens seven L7 is convex at the optical axis, and the image side surface S17 is concave at the optical axis.
  • the object side surface S16 is convex at the circumference, and the image side surface S17 is concave at the circumference.
  • the lens eight L8 The object-side surface S18 is a convex surface at the optical axis, and the image-side surface S19 is a convex surface at the optical axis; the object-side surface S18 is a convex surface at the circumference, and the image-side surface S19 is a convex surface at the circumference.
  • Table 2a and Table 2b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the second embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 2b shows the aspheric coefficients of each lens in the second embodiment.
  • the effective focal length f of the optical lens 1 is 14.95 mm
  • the combined focal length fg1 of the first lens group G1 is 41.23 mm
  • the effective focal length fg2 of the second lens group G2 is -24.64 mm
  • the aperture FNO is 2.01
  • the field of view FOV is 27.0°
  • the total optical length TTL of the optical lens 1 is 25.4 mm.
  • the parameters of the optical lens 1 in the second embodiment satisfy the relationship shown in Table 2c.
  • Figures 8a, 8b and 8c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the second embodiment.
  • the optical lens 1 in the second embodiment has a small deviation degree of the convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG8b and FIG8c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG8c, it can be seen that the distortion of the optical lens 1 in the second embodiment is small, which means that the image deformation caused by the main light beam is small and the imaging distortion effect is low.
  • the second embodiment The optical lens 1 in the example achieves the goals of long focus characteristics, compact structure and high imaging quality.
  • FIG9 , FIG10 a , FIG10 b and FIG10 c show a schematic structural diagram of the optical lens 1 in the camera module 10 in the third embodiment and a simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with positive focal power, a lens three L3 with negative focal power, a lens four L4 with negative focal power, a lens five L5 with positive focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with negative focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is concave at the optical axis, and the image side surface S5 is concave at the optical axis; the object side surface S4 is concave at the circumference, and the image side surface S5 is concave at the circumference.
  • the object side surface S6 of the third lens L3 is concave at the optical axis, and the image side surface S7 is concave at the optical axis; the object side surface S6 is convex at the circumference, and the image side surface S7 is concave at the circumference.
  • the object side surface S8 of the fourth lens L4 is concave at the optical axis, and the image side surface S11 is convex at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is convex at the circumference.
  • the object side surface S12 of the fifth lens L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is concave at the circumference.
  • the object side surface S14 of the lens six L6 is convex at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is convex at the optical axis, and the image side surface S17 is concave at the optical axis; the object side surface S16 is convex at the circumference, and the image side surface S17 is concave at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 3a and Table 3b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the third embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 3b is the aspheric coefficient of each lens in the third embodiment.
  • the effective focal length f of the optical lens 1 is 14.93 mm
  • the combined focal length fg1 of the first lens group G1 is 15.97 mm
  • the effective focal length fg2 of the second lens group G2 is -7.58 mm
  • the aperture FNO is 2.0
  • the field of view FOV is 26.2°
  • the total optical length TTL of the optical lens 1 is 23.3 mm.
  • the parameters of the optical lens 1 in the third embodiment satisfy the relationship shown in Table 3c.
  • Figures 10a, 10b and 10c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the third embodiment.
  • the optical lens 1 in the third embodiment has a small deviation degree of convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG10b and FIG10c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG10c, it can be seen that the distortion of the optical lens 1 in the third embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the third embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • FIG. 11 , FIG. 12 a , FIG. 12 b and FIG. 12 c show an optical lens in a camera module 10 in a fourth embodiment.
  • the optical lens 1 includes a lens 1 L1 with positive focal power, a lens 2 L2 with negative focal power, a lens 3 L3 with positive focal power, a lens 4 L4 with negative focal power, a lens 5 L5 with positive focal power, a lens 6 L6 with negative focal power, a lens 7 L7 with positive focal power, and a lens 8 L8 with negative focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens 1 L1 is convex toward the image side at the optical axis (referred to as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (referred to as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the lens 2 L2 is a convex surface at the optical axis, and the image side surface S5 is a convex surface at the optical axis; the object side surface S4 is a convex surface at the circumference, and the image side surface S5 is a convex surface at the circumference.
  • the object side surface S6 of the lens 3 L3 is a convex surface at the optical axis, and the image side surface S7 is a concave surface at the optical axis; the object side surface S6 is a convex surface at the circumference, and the image side surface S7 is a concave surface at the circumference.
  • the object side surface S8 of the lens four L4 is concave at the optical axis, and the image side surface S11 is convex at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is convex at the circumference.
  • the object side surface S12 of the lens five L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is convex at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 is concave at the optical axis
  • the image side surface S17 is concave at the optical axis
  • the object side surface S16 is concave at the circumference
  • the image side surface S17 is concave at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 4a and Table 4b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the fourth embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 4b is the aspheric coefficient of each lens in the fourth embodiment.
  • the effective focal length f of the optical lens 1 is 14.95 mm
  • the combined focal length fg1 of the first lens group G1 is 20.65 mm
  • the effective focal length fg2 of the third lens group G3 is -8.84 mm
  • the aperture FNO is 2.0
  • the field of view FOV is 27.0°
  • the total optical length TTL of the optical lens 1 is 24.4 mm.
  • the main difference between the optical lens 1 in the fourth embodiment and the optical lens 1 in the first to third embodiments is that the parameters of the optical lens 1 in the fourth embodiment satisfy the relationship shown in Table 4c.
  • Figures 12a, 12b and 12c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the second embodiment.
  • the optical lens 1 in the fourth embodiment has a small deviation degree of convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG12b and FIG12c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG12c, it can be seen that the distortion of the optical lens 1 in the fourth embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the fourth embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • FIG. 13 , FIG. 14 a , FIG. 14 b and FIG. 14 c show the optical lens in the camera module 10 in the fifth embodiment. Structural diagram and simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with negative focal power, a lens three L3 with positive focal power, a lens four L4 with negative focal power, a lens five L5 with positive focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with positive focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is convex at the optical axis, and the image side surface S5 is convex at the optical axis; the object side surface S4 is convex at the circumference, and the image side surface S5 is convex at the circumference.
  • the object side surface S6 of the third lens L3 is convex at the optical axis, and the image side surface S7 is concave at the optical axis; the object side surface S6 is convex at the circumference, and the image side surface S7 is concave at the circumference.
  • the object side surface S8 of the fourth lens L4 is concave at the optical axis, and the image side surface S11 is convex at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is convex at the circumference.
  • the object side surface S12 of the fifth lens L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is convex at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is concave at the optical axis, and the image side surface S17 is concave at the optical axis, the object side surface S16 is concave at the circumference, and the image side surface S17 is concave at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 5a and Table 5b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the fifth embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 5b shows the aspheric coefficients of each lens in the fifth embodiment.
  • the effective focal length f of the optical lens 1 is 15.1 mm
  • the combined focal length fg1 of the first lens group G1 is 14.63 mm
  • the effective focal length fg2 of the second lens group G2 is -23.05 mm
  • the aperture FNO is 2.01
  • the field of view FOV is 26.8°
  • the total optical length TTL of the optical lens 1 is 24.5 mm.
  • the parameters of the optical lens 1 in the fifth embodiment satisfy the relationship shown in Table 5c.
  • Figures 14a, 14b and 14c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the fifth embodiment.
  • the optical lens 1 in the fifth embodiment has a small deviation degree of convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG14b and FIG14c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG14c, it can be seen that the distortion of the optical lens 1 in the fifth embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the fifth embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • FIG. 15 , FIG. 16 a , FIG. 16 b and FIG. 16 c show a schematic diagram of the structure of the optical lens in the camera module 10 in the sixth embodiment and a simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with negative focal power, a lens three L3 with positive focal power, a lens four L4 with negative focal power, a lens five L5 with negative focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with positive focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is convex at the optical axis, and the image side surface S5 is convex at the optical axis; the object side surface S4 is convex at the circumference, and the image side surface S5 is convex at the circumference.
  • the object side surface S6 of the third lens L3 is convex at the optical axis, and the image side surface S7 is concave at the optical axis; the object side surface S6 is convex at the circumference, and the image side surface S7 is concave at the circumference.
  • the object side surface S8 of the fourth lens L4 is concave at the optical axis, and the image side surface S11 is convex at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is convex at the circumference.
  • the object side surface S12 of the fifth lens L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is convex at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is concave at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is concave at the optical axis, and the image side surface S17 is concave at the optical axis, the object side surface S16 is concave at the circumference, and the image side surface S17 is concave at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 6a and Table 6b give the parameters such as the radius of curvature, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the sixth embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 6b shows the aspheric coefficients of each lens in the sixth embodiment.
  • the effective focal length f of the optical lens 1 is 14.95 mm
  • the combined focal length fg1 of the first lens group G1 is 9.27 mm
  • the effective focal length fg2 of the second lens group G2 is -23.28 mm
  • the aperture FNO is 2.1
  • the field of view FOV is 27.2°
  • the total optical length TTL of the optical lens 1 is 26.2 mm.
  • the parameters of the optical lens 1 in the sixth embodiment satisfy the relationship shown in Table 6c.
  • Figures 16a, 16b and 16c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the sixth embodiment.
  • the optical lens 1 in the sixth embodiment has a small deviation degree of convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG16b and FIG16c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG16c, it can be seen that the distortion of the optical lens 1 in the sixth embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the sixth embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • FIG. 17 , FIG. 18 a , FIG. 18 b and FIG. 18 c show the optical lens in the camera module 10 in the seventh embodiment. Structural diagram and simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with positive focal power, a lens three L3 with negative focal power, a lens four L4 with negative focal power, a lens five L5 with positive focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with positive focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is convex at the optical axis, and the image side surface S5 is convex at the optical axis; the object side surface S4 is convex at the circumference, and the image side surface S5 is convex at the circumference.
  • the object side surface S6 of the third lens L3 is concave at the optical axis, and the image side surface S7 is concave at the optical axis; the object side surface S6 is convex at the circumference, and the image side surface S7 is concave at the circumference.
  • the object side surface S8 of the fourth lens L4 is concave at the optical axis, and the image side surface S11 is concave at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is concave at the circumference.
  • the object side surface S12 of the fifth lens L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is convex at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is convex at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is convex at the optical axis, and the image side surface S17 is concave at the optical axis, the object side surface S16 is concave at the circumference, and the image side surface S17 is convex at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 7a and Table 7b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the seventh embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 7b shows the aspheric coefficients of each lens in the seventh embodiment.
  • the effective focal length f of the optical lens 1 is 12.95 mm
  • the combined focal length fg1 of the first lens group G1 is 11.52 mm
  • the effective focal length fg2 of the second lens group G2 is -44.98 mm
  • the aperture FNO is 2.0
  • the field of view FOV is 31.3°
  • the total optical length TTL of the optical lens 1 is 26.3 mm.
  • the parameters of the optical lens 1 in the seventh embodiment satisfy the relationship shown in Table 7c.
  • Figures 18a, 18b and 18c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), field curvature diagram (Astigmatic Field Curves) and distortion diagram (Distortion) of the optical lens 1 in the seventh embodiment.
  • the optical lens 1 in the seventh embodiment has a small deviation degree of convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG18b and FIG18c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG18c, it can be seen that the distortion of the optical lens 1 in the seventh embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the seventh embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • FIG. 19 , FIG. 20 a , FIG. 20 b and FIG. 20 c show a schematic diagram of the structure of the optical lens in the camera module 10 in the eighth embodiment and a simulation effect diagram.
  • the optical lens 1 includes a lens one L1 with positive focal power, a lens two L2 with positive focal power, a lens three L3 with negative focal power, a lens four L4 with negative focal power, a lens five L5 with positive focal power, a lens six L6 with negative focal power, a lens seven L7 with positive focal power, and a lens eight L8 with positive focal power, which are arranged from the object side to the image side.
  • the object side surface S1 of the lens L1 is convex toward the image side at the optical axis (abbreviated as: concave surface), the reflection surface S2 is a plane at the optical axis, and the image side surface S3 is a plane at the optical axis;
  • the object side surface S1 is convex toward the object side at the circumference (abbreviated as: convex surface), the reflection surface S2 is a plane at the circumference, and the image side surface S3 is a plane at the circumference.
  • the object side surface S4 of the second lens L2 is concave at the optical axis, and the image side surface S5 is convex at the optical axis; the object side surface S4 is concave at the circumference, and the image side surface S5 is concave at the circumference.
  • the object side surface S6 of the third lens L3 is concave at the optical axis, and the image side surface S7 is concave at the optical axis; the object side surface S6 is convex at the circumference, and the image side surface S7 is concave at the circumference.
  • the object side surface S8 of the fourth lens L4 is concave at the optical axis, and the image side surface S11 is concave at the optical axis; the object side surface S8 is concave at the circumference, and the image side surface S11 is concave at the circumference.
  • the object side surface S12 of the fifth lens L5 is convex at the optical axis, and the image side surface S13 is convex at the optical axis; the object side surface S12 is convex at the circumference, and the image side surface S13 is convex at the circumference.
  • the object side surface S14 of the lens six L6 is concave at the optical axis, and the image side surface S15 is convex at the optical axis; the object side surface S14 is convex at the circumference, and the image side surface S15 is convex at the circumference.
  • the object side surface S16 of the lens seven L7 is convex at the optical axis, and the image side surface S17 is concave at the optical axis, the object side surface S16 is concave at the circumference, and the image side surface S17 is convex at the circumference.
  • the object side surface S18 of the lens eight L8 is convex at the optical axis, and the image side surface S19 is convex at the optical axis; the object side surface S18 is convex at the circumference, and the image side surface S19 is convex at the circumference.
  • Table 8a and Table 8b give the parameters such as the curvature radius, spacing, refractive index (Nd), Abbe number, focal length, etc. of each lens and filter 3 in the optical lens 1 of the camera module 10 in the eighth embodiment.
  • the spacing includes the thickness of the lens itself and the spacing between the lenses.
  • the dispersion coefficient is also the Abbe number.
  • Table 8b shows the aspheric coefficients of each lens in the eighth embodiment.
  • the effective focal length f of the optical lens 1 is 14.95 mm
  • the combined focal length fg1 of the first lens group G1 is 10.88 mm
  • the effective focal length fg2 of the second lens group G2 is -24.88 mm
  • the aperture FNO is 2.01
  • the field of view FOV is 24.5°
  • the total optical length TTL of the optical lens 1 is 26.3 mm.
  • the parameters of the optical lens 1 in the eighth embodiment satisfy the relationship shown in Table 8c.
  • FIG19 is a schematic diagram of the structure of the optical lens 1 in the eighth embodiment.
  • the main parameters of the optical lens 1 in the eighth embodiment given in Tables 8a and 8b satisfy the relationship in Table 8c, simulation results are obtained through simulations in FIG18a, FIG18b and FIG18c.
  • FIG18a, FIG18b and FIG18c are respectively the axial spherical aberration diagram (Longitudinal Spherical Aberration), the field curvature diagram (Astigmatic Field Curves) and the distortion diagram (Distortion) of the optical lens 1 in the eighth embodiment.
  • the optical lens 1 in the eighth embodiment has a small deviation degree of the convergence focus of each wavelength of light and a small deviation from the ideal image plane, and the spherical aberration in the imaging picture is well corrected; from the field curvature diagram and distortion diagram in FIG18b and FIG18c, it can be seen that the sagittal field curvature and the meridian field curvature are both controlled within a small range, reflecting that the curvature of the imaging surface is well controlled; from the distortion diagram in FIG20c, it can be seen that the distortion of the optical lens 1 in the eighth embodiment is small, which means that the image deformation caused by the main light beam is small, and the imaging distortion effect is low.
  • the optical lens 1 in the eighth embodiment achieves the purpose of telephoto characteristics, miniaturized structure and high imaging quality.
  • the optical lenses 1 also have different focal lengths and surface directions of the lenses, as shown in Tables 9 to 11.
  • Table 9 shows the positive and negative focal lengths of the eight optical lenses 1 in the first to eighth embodiments, respectively, including the lens 1 L1 to the lens 8 L8;
  • Table 10 shows the concave and convex sides of the object side or image side of the lens 1 L1 to the lens 8 L8 in the eight optical lenses 1 in the first to eighth embodiments at the optical axis;
  • Table 11 shows the concave and convex sides of the object side or image side of the lens 1 L1 to the lens 8 L8 in the eight optical lenses 1 in the first to eighth embodiments at the circumference.
  • the "+” and “-” in Table 9 represent the positive and negative conditions of the optical power of each lens. Among them, “+” represents that the lens has positive optical power; “-” represents that the lens has negative optical power.
  • the “-(”, “(-”, “)(”, and “()” in Table 11 represent the concave-convex situation of the object side or image side of each lens at the circumference.
  • “(-” represents that the object side of the lens is convex toward the object side at the circumference, and the image side is flat at the circumference
  • “-(” represents that the object side of the lens is flat, and the image side is convex toward the object side at the circumference
  • “)(” represents that the object side of the lens is convex toward the image side at the circumference, and the image side is convex toward the object side at the circumference
  • “()” represents that the object side of the lens is convex toward the object side at the circumference, and the image side is convex toward the object side at the circumference.
  • the main parameters of the optical lens 1 in the above eight embodiments of the present application satisfy the following relationship:
  • the effective focal length fg1 of the first lens group G1 of the optical lens 1 and the effective focal length f of the optical lens 1 satisfy the following: 0.65 ⁇ fg1/f ⁇ 5.6.
  • fg1/f is an important parameter of the optical lens 1.
  • Table 12 The values of this parameter in the first to eighth embodiments are shown in Table 12:
  • this parameter in the eighth embodiment is the smallest, which is 0.68; the value of this parameter in the first embodiment is the largest, which is 5.64.
  • the effective focal length f of the optical lens 1 in the eight embodiments is approximately between 13 mm and 16 mm, and the optical lens 1 has a telephoto characteristic, which is conducive to balancing the positive focal power of the first lens group G1, the negative focal power of the second lens group G2, and the lens with positive focal power in the third lens group G3.
  • the aberrations of the optical lens 1 in the eight embodiments are well controlled, thereby effectively improving the imaging quality of the optical lens 1, so that the optical lens 1 can effectively improve the imaging quality of the optical lens 1 on the basis of satisfying the telephoto characteristic, thereby achieving both the telephoto characteristic and high imaging quality. the goal of.
  • the effective focal length fg1 of the first lens group G1 of the optical lens 1 and the effective focal length f of the optical lens 1 satisfy: fg1/f ⁇ 1.
  • fg1/f satisfies the relationship fg1/f ⁇ 1, such as the optical lens 1 in the fifth to eighth embodiments
  • the optical lens 1 in the fifth to eighth embodiments further reduces the spherical aberration of the optical lens 1 compared with the optical lens 1 in the first to fourth embodiments, thereby improving the imaging quality.
  • the effective focal length fg2 of the second lens group G2 of the optical lens 1 and the effective focal length f of the optical lens 1 satisfy: -3.5 ⁇ fg2/f ⁇ 0.
  • fg2/f is an important parameter of the optical lens 1.
  • Table 13 The values of this parameter in the first to eighth embodiments are shown in Table 13:
  • the positive focal power of the first lens group G1 in the optical lens 1 can be effectively balanced to achieve the telephoto characteristic, while avoiding the third lens group G3 in the optical lens 1 from having too large a transverse dimension along the optical axis, which causes the total optical length TTL to be too long, thereby allowing the optical lens 1 to take into account both the telephoto characteristic and the miniaturized design.
  • the sum f ⁇ of the effective focal lengths of the third lens of the optical lens 1 and the fourth lens of the optical lens 1 and the effective focal length fg2 of the second lens group G2 of the optical lens 1 satisfy: -1.2 ⁇ fg2/f ⁇ 8.5.
  • Table 14 The values of this parameter in the first to eighth embodiments are shown in Table 14:
  • the f' of the optical lens 1 in the eight embodiments has a relatively large span from -10.27 mm in the fourth embodiment to 51.46 mm in the seventh embodiment, that is, the parameter f', which is the sum of the focal length f7 of the seventh lens L7 and the focal length f8 of the eighth lens L8 in the optical lens 1, has a relatively small effect on the performance of the optical lens 1.
  • the total optical length TTL of the optical lens 1 and the effective focal length f of the optical lens 1 satisfy: TTL/f ⁇ 2.1.
  • TTL/f is an important parameter of the optical lens 1.
  • Table 15 The values of this parameter in the first to eighth embodiments are shown in Table 15:
  • the parameter has the smallest value of 1.61 in the fourth embodiment, and the corresponding optical total length TTL is 24.4 mm; the parameter has the largest value of 2.03 in the seventh embodiment, and the corresponding optical total length TTL is 26.3 mm.
  • the effective focal length f of the optical lens 1 is about 13 mm, which is about 2 mm less than the effective focal length f of the optical lens 1 in other embodiments, which is about 15 mm. It can be inferred that when the parameter is too large, it means that the optical total length TTL of the optical lens 1 increases, and the effective focal length f is relatively reduced, which is not conducive to the optical lens 1 to achieve the telephoto characteristic and miniaturized design. When the parameter satisfies the above relationship, the optical lens 1 can effectively take into account both the telephoto characteristic and the miniaturized design.
  • the entrance pupil diameter EPD of the optical lens 1 and the effective focal length f of the optical lens 1 satisfy: f/EPD ⁇ 2.1.
  • f/EPD is an important parameter of the optical lens 1, that is, the aperture FNO.
  • the values of this parameter in the first to eighth embodiments are shown in Table 16:
  • this parameter is about 2 in the first to eighth embodiments, which is effectively reduced compared with the value of 2.8 of the traditional optical lens 1.
  • the smaller the value of this parameter that is, the smaller the aperture, the deeper the depth of field, and the clearer the background.
  • the optical lens 1 can increase the maximum light throughput of the optical system on the basis of having a telephoto characteristic, thereby effectively improving the image quality. In other words, even when shooting in a dark environment, a clear image effect can be achieved.
  • the distance AT12 between the first lens group G1 of the optical lens 1 and the second lens group G2 of the optical lens 1 on the optical axis and the distance AT23 between the second lens group G2 of the optical lens 1 and the third lens group G3 of the optical lens 1 on the optical axis satisfy: 0.1 ⁇ AT12/AT23 ⁇ 4.76.
  • AT12/AT23 is an important parameter of the optical lens 1.
  • Table 17 The values of the parameters in the first to eighth embodiments are shown in Table 17:
  • the parameter has the smallest value of 0.19 in the fifth embodiment and the largest value of 4.76 in the seventh embodiment.
  • the performance of the optical lens 1 such as field curvature and distortion, will deteriorate.
  • the value of the parameter satisfies the above relationship, it is beneficial to control the aberration of the optical lens 1, thereby improving the imaging quality.
  • the sum ct2 of the center thickness of each lens in the second lens group G2 of the optical lens 1 and the sum ct3 of the center thickness of each lens in the third lens group G3 of the optical lens 1 satisfy: ct2/ct3 ⁇ 1.3.
  • ct2/ct3 is an important parameter of the optical lens 1.
  • the values of the parameters in the first to eighth embodiments are shown in Table 18:
  • the parameter has the smallest value of 0.14 in the third embodiment and the largest value of 1.28 in the third embodiment.
  • the value of the parameter increases, the field curvature and distortion control become worse.
  • the value of the parameter is too large, the thickness of one or more lenses in the optical lens 1 will become thinner, and the performance, such as field curvature and distortion, will be affected.
  • the value of the parameter of the optical lens 1 satisfies the above relationship, it is beneficial to control the aberration of the optical lens 1, thereby improving the imaging quality.
  • the sum R2 of the curvature radii of the object side surface and the image side surface of the second lens in the third lens group G3 of the optical lens 1 and the sum R3 of the curvature radii of the object side surface and the image side surface of the third lens in the third lens group G3 of the optical lens 1 satisfy: -1.5 ⁇ R2/R3 ⁇ 12.5.
  • R2/R3 is an important parameter of the optical lens 1.
  • the values of the parameters in the first to eighth embodiments are shown in Table 19:
  • the parameter has the smallest value of -1.12 in the fourth embodiment and the largest value of 12.21 in the third embodiment.
  • the field curvature and distortion control become worse.
  • the structural schematic diagrams of the optical lens 1 in the first to eighth embodiments and the values of the parameter corresponding to the optical lens 1, as well as the corresponding simulation effect diagrams it can be inferred that when the value of the parameter is too small, the object side or image side of multiple lenses in the third lens G3 in the optical lens 1 will be close to the plane, that is, the focal length will be small, and the ability of light to converge or diverge will be weakened, thereby reducing the intervals between the multiple lenses in the optical lens 1 and arranging them densely along the optical axis, which increases the difficulty of designing the optical lens 1.
  • the value of this parameter When the value of this parameter is too large, it will cause at least one lens of the multiple lenses in the third lens G3 in the optical lens 1 to be thin.
  • the first lens in the third lens group G3, namely lens five L5 is thin, has a large curvature and is difficult to process.
  • the closer the lens is to the image side the larger the size is in the direction perpendicular to the optical axis, resulting in an excessively large overall size of the optical lens 1 in the direction perpendicular to the optical axis, which is not conducive to the miniaturization design of the optical lens 1.
  • the optical lens 1 when the parameter value satisfies the above relationship, it is conducive to the reasonable design of the shape and parameters of each lens in the optical lens 1, so that the optical lens 1 can achieve the purpose of telephoto characteristics, eliminate aberrations, improve imaging quality, and control costs.

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Abstract

一种光学镜头（1）、摄像头模组（10）及电子设备（100），其中，光学镜头（1）包括沿物侧到像侧排列的第一透镜组（G1）、第二透镜组（G2）以及第三透镜组（G3），第一透镜组（G1）具有正光焦度，第二透镜组（G2）具有负光焦度，第三透镜组（G3）具有光焦度；第一透镜组（G1）的有效焦距fg1与光学镜头（1）的有效焦距f满足：0.65＜fg1/f＜5.6，光学镜头（1）可以很好地兼顾长焦特性和高成像质量。

Description

一种光学镜头、摄像头模组及电子设备
本申请要求于2022年11月10日提交国家知识产权局、申请号为202211405002.X、申请名称为“一种光学镜头、摄像头模组及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备技术领域，尤其涉及一种光学镜头、摄像头模组及电子设备。
背景技术
近年来，诸如手机、电脑和数字相机等便携式电子设备的普及，用户对电子设备的摄像头模组的拍照性能的要求愈来愈高。例如在一般的摄像用途中，不可避免会涉及对远景的摄像需求。由于对缩小设备厚度的追求，电子设备的摄像头模组中的光学镜片的纵向尺寸受到了较大的限制，使得光学镜片的焦距过小，难以实现良好的拍摄效果。为此，如何使电子设备在拥有较薄的厚度下具有长焦特性和高成像质量，已成为业内一项重要的课题。
发明内容
本申请的实施例提供一种光学镜头、摄像头模组及电子设备，用于提供一种可以很好地兼顾长焦特性和高成像质量的光学镜头。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，本申请实施例提供了一种光学镜头，包括：包括沿物侧到像侧排列的第一透镜组、第二透镜组以及第三透镜组，所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度，所述第三透镜组具有光焦度；其中，所述第一透镜组的有效焦距fg1与所述光学镜头的有效焦距f满足：0.65<fg1/f<5.6。
通过采用上述技术方案，通过合理控制第一透镜组的有效焦距与光学镜头的有效焦距，有利于使第一透镜组的光焦度与第二透镜组产生的负光焦度相平衡，以实现减小像差、提升成像质量的目的。
在一些实施例中，所述第一透镜组的有效焦距fg1与所述光学镜头的有效焦距f满足：fg1/f<1。
通过采用上述技术方案，这样可以进一步平衡第一透镜组与第二透镜组、第三透镜组的光焦度，能够很好地校正球差，更进一步提升成像质量。
在一些实施例中，所述第二透镜组的有效焦距fg2与所述光学镜头的有效焦距f满足：-3.5<fg2/f<0。
通过采用上述技术方案，可以有效避免因第二透镜组的有效焦距与光学镜头的有效焦距过小不能够很好地平衡第一透镜组的球差导致光学镜头的长度增加，进而有利于光学镜头的小型化设计。
在一些实施例中，所述光学镜头的光学总长TTL与所述光学镜头的有效焦距f满足：TTL/f<2.1。
通过采用上述技术方案，这样可以避免光学镜头的光学总长与有效焦距比值过大造成光学总长增大，影响光学镜头的小型化。
在一些实施例中，所述光学镜头的入瞳直径EPD与所述光学镜头的有效焦距f满足：f/EPD≤2.1。
通过控制有效焦距和入瞳直径在一定的范围内，使得光学镜头可以在具有长焦特性的基础上，增加光学***的大通光量，提升成像性能。也就是说，即使在较暗环境下拍摄，也能达到清晰的成像效果。
在一些实施例中，所述第一透镜组、所述第二透镜组在光轴上的间距AT12与所述第二透镜组、所述第三透镜组在光轴上的间距AT23满足：0.1<AT12/AT23<4.76。
通过采用上述技术方案，通过合理控制第一透镜组、第二透镜组和第三透镜组在光轴上的间距，可有效降低透镜组之间的间隔对场曲影响的敏感性，可以有效矫正光学镜头的场曲。
在一些实施例中，所述第二透镜组和所述第三透镜组均包括多个透镜；所述第二透镜组中各个透镜的中心厚度之和ct2与所述第三透镜组中各个透镜的中心厚度之和ct3满足：ct2/ct3≤1.3。
满足上述关系时，可以有效降低第二透镜组和第三透镜组中的一个或者多个透镜的厚度变薄使得光学镜头的畸变、场曲等性能受到影响的程度。
在一些实施例中，所述第三透镜组包括四个透镜，所述四个透镜中，沿物侧到像侧方向，第一个透镜和第四个透镜均具有光焦度，第二个透镜具有负光焦度，第三个透镜具有正光焦度；所述第三个透镜和所述第四个透镜的有效焦距之和fˊ和所述第二透镜组的有效焦距fg2满足：-1.2<fg2/fˊ<8.5。
通过合理分配光学镜头的各透镜组的光焦度，当满足上述关系时，可以使得第一透镜组、第二透镜组和第三透镜组的正负球差相互抵消，提升成像质量；同时，还有利于缩短光学镜头的长度，进而实现光学镜头的小型化设计。
在一些实施例中，所述第三透镜组中的所述第二个透镜的物侧面与像侧面的曲率半径之和R2与所述第三透镜组中的所述第三个透镜的物侧面与像侧面的曲率半径之和R3满足：-1.5<R2/R3<12.5。
满足上述关系时，一方面，可以有效控制第三透镜组边缘光线的偏转角，也就是经过第三透镜组的于圆周处光线不会过大的向靠近光轴或者边缘方向偏转，使得经过第三透镜组的于圆周处光线比较平缓，使得光束直径得到有效控制，有效控制第三透镜组的第四个透镜沿垂直于光轴的方向上的尺寸，进而缩短光学镜头沿垂直于光轴的方向上的尺寸；另一方面，使得第三透镜组的透镜不会太薄，易于加工。
在一些实施例中，所述第二透镜组可沿垂直于光轴的方向相对所述第一透镜组移动。
通过采用上述技术方案，可以很好地补偿拍照时抖动造成沿垂直于光轴的方向的偏移，使得光学镜头具有光学防抖功能，进而提高成像质量。
在一些实施例中，所述第二透镜组包括两个透镜，所述两个透镜胶合在一起，并且所述两个透镜均为球面透镜。
通过采用上述技术方案，由于球面透镜方便加工，且成本低，通过将两个球面透镜通过胶合形成第二透镜组，使得第二透镜组易加工，且有效消除色差和球差。
在一些实施例中，所述第一透镜组包括曲面棱镜，所述曲面棱镜包括入射面、出射面以及反射面，所述反射面与所述出射面之间的夹角为锐角，所述入射面连接于所述反射面和所述出射面之间，且所述入射面为凸面。
通过采用上述技术方案，这样可以将入射光线经过棱镜后进行偏转，进而有效缩短光学镜头的长度，有利于光学镜头的小型化；另外将入射面设计成凸面，也就是向物侧凸起，有利于增加光学镜头的通光孔径，实现大光圈，使得光学镜头在相对较小、较薄的情况下能够很好地校正像差，进而提升成像质量。
在一些实施例中，所述入射面为非球面。
通过采用上述技术方案，通过将曲面棱镜的入射面设计成非球面，减小光学镜头沿光轴方向的尺寸，进一步有利于增加光学镜头的通光孔径，实现大光圈，使得光学镜头在相对较小、较薄的情况下能够很好地校正像差，进而提升成像质量。
在一些实施例中，所述曲面棱镜为玻璃棱镜，所述第一透镜组还包括设置于所述出射面的像侧的至少一个透镜，所述至少一个透镜中，最靠近所述曲面棱镜的透镜为球面透镜。
通过采用上述技术方案，通过将最靠近曲面棱镜的透镜设计成球面透镜，这样，有利于降低加工难度，方便该透镜在必要时刻可以与曲面棱镜的像侧面进行胶合，进而有效消除色差和球差。
第二方面，本申请实施例提供了一种摄像头模组，包括感光元件，以及第一方面中所述的光学镜头，所述感光元件设置于所述光学镜头的像侧。
本申请实施例中的摄像头模组与第一方面中的光学镜头所取得的技术效果相同，在此不再赘述。
第三方面，本申请实施例提供了一种电子设备，包括壳体，以及第二方面中所述的摄像头模组，所述摄像头模组安装于所述壳体上。
本申请实施例中的电子设备与第二方面中的摄像头模组所取得的技术效果相同，在此不再赘述。
附图说明
图1为本申请一些实施例中的电子设备的结构示意图；
图2为图1中的A-A剖视图；
图3为本申请第一实施例中的光学镜头的结构示意图；
图4为图3中第二透镜组向一个方向移动的光学镜头的结构示意图；
图5为图3中第二透镜组向另一个方向移动的光学镜头的结构示意图；
图6a为本申请第一实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图6b为本申请第一实施例中的光学镜头的仿真效果图二(场曲图)；
图6c为本申请第一实施例中的光学镜头的仿真效果图三(畸变图)；
图7为本申请第二实施例中的光学镜头的结构示意图；
图8a为本申请第二实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图8b为本申请第二实施例中的光学镜头的仿真效果图二(场曲图)；
图8c为本申请第二实施例中的光学镜头的仿真效果图三(畸变图)；
图9为本申请第三实施例中的光学镜头的结构示意图；
图10a为本申请第三实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图10b为本申请第三实施例中的光学镜头的仿真效果图二(场曲图)；
图10c为本申请第三实施例中的光学镜头的仿真效果图三(畸变图)；
图11为本申请第四实施例中的光学镜头的结构示意图；
图12a为本申请第四实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图12b为本申请第四实施例中的光学镜头的仿真效果图二(场曲图)；
图12c为本申请第四实施例中的光学镜头的仿真效果图三(畸变图)；
图13为本申请第五实施例中的光学镜头的结构示意图；
图14a为本申请第五实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图14b为本申请第五实施例中的光学镜头的仿真效果图二(场曲图)；
图14c为本申请第五实施例中的光学镜头的仿真效果图三(畸变图)；
图15为本申请第六实施例中的光学镜头的结构示意图；
图16a为本申请第六实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图16b为本申请第六实施例中的光学镜头的仿真效果图二(场曲图)；
图16c为本申请第六实施例中的光学镜头的仿真效果图三(畸变图)；
图17为本申请第七实施例中的光学镜头的结构示意图；
图18a为本申请第七实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图18b为本申请第七实施例中的光学镜头的仿真效果图二(场曲图)；
图18c为本申请第七实施例中的光学镜头的仿真效果图三(畸变图)；
图19为本申请第八实施例中的光学镜头的结构示意图；
图20a为本申请第八实施例中的光学镜头的仿真效果图一(轴向球面像差图)；
图20b为本申请第八实施例中的光学镜头的仿真效果图二(场曲图)；
图20c为本申请第八实施例中的光学镜头的仿真效果图三(畸变图)。
具体实施方式
为方便理解，下面先对本申请实施例所涉及的英文简写和有关技术术语进行解释和描述。
光焦度(focal power)，等于像方光束会聚度与物方光束会聚度之差，它表征光学镜头偏折光线的能力。
具有正光焦度的透镜或透镜组，透镜或透镜组具有正的焦距，具有会聚光线的效果。
具有负光焦度的透镜或透镜组，透镜或透镜组具有负的焦距，具有发散光线的效果。
焦距(focal length)，也称为焦长，是光学镜头中衡量光的聚集或发散的度量方式，指无限远的景物通过透镜或透镜组在焦平面结成清晰影像时，透镜或透镜组的光学中心至焦平面的垂直距离。从实用的角度可以理解为物体在无限远时镜头中心至平面的距离。对于定焦镜头来说，其光学中心的位置是固定不变的；对于长焦镜头来说，镜头的光学中心的变化带来镜头焦距的变化。
镜头的有效焦距(effective focal length，EFL)，是指镜头中心到焦点的距离。
物侧面，以透镜为界，被摄物体所在一侧为物侧，透镜靠近物侧的表面称为物侧面。
像侧面，以透镜为界，被摄物体的图像所在的一侧为像侧，透镜靠近像侧的表面称为像侧面。
光阑(aperturediaphragm)，是用来控制光线透过镜头，进入机身内感光面光量的装置，它通常是在镜头内。
光圈值，又称F数(FNO)，是镜头的焦距/镜头入瞳直径得出的相对值(相对孔径的倒数)。光圈值愈小，在同一单位时间内的进光量便愈多。光圈值越大，景深越小，拍照的背景内容将会虚化，类似长焦镜头的效果。
光学总长(total track length，TTL)，指镜头最靠近物侧的表面至成像面的总长度，TTL是形成相机高度的主要因素。
成像面，位于光学镜头中所有透镜的像侧、且光线依次穿过光学镜头中各透镜后形成像的载面。
光轴，是一条垂直穿过透镜中心的轴线。镜头光轴是通过镜头的各个透镜的中心的轴线。与光轴平行的光线射入凸透镜时，理想的凸透镜应是所有的光线会聚在透镜后的一点，这个会聚所有光线的一点，即为焦点。
焦点，平行光线经透镜或透镜组折射后的会聚点。
像方焦面，也称为后焦面或第二焦面，为经过像方焦点(也称为后焦点或第二焦点)且垂直于***光轴的平面。
阿贝数(Abbe)，即色散系数，是光学材料在不同波长下的折射率的差值比，代表材料色散程度大小。
像差：光学镜头于光轴处具有理想光学***的性质，物体上的一点发出的靠近轴光线与像面相交在一点(也即光轴像点)，但是实际穿过镜头不同孔径的光线很难完美的相交在一点，而是与近轴像点的位置有一定偏差，这些差异统称为像差。
轴向色差(longitudinal spherical aber)，也称为纵向色差或位置色差或轴向像差，一束平行于光轴的光线，在经过镜头后会聚于前后不同的位置，这种像差称为位置色差或轴向色差。这是由于镜头对各个波长的光所成像的位置不同，使得最后成像时不同色的光的像方焦平面不能重合，复色光散开形成色散。
畸变(distortion)，也称为失真，光学镜头对物体所成的像相对于物体本身而言的失真程度。畸变是由于光阑球差的影响，不同视场的主光线通过光学镜头后与高斯像面的交点高度不等于理想像高，两者之差就是畸变。因此畸变只改变轴外物点在理想面上的成像位置，使像的形状产生失真，但不影响像的清晰度。
像散(astigmatism)，由于物点不在光学镜头的光轴上，它所发出的光束与光轴有一倾斜角。该光束经透镜折射后，其子午细光束与弧矢细光束的汇聚点不在一个点上。即光束不能聚焦于一点，成像不清晰，故产生像散。子午细光束和弧矢细光束是旋转对称的光学镜头内两个垂直平面内的光束名称。
子午面(meridian plane)，光轴外物点的主光线(主光束)与光轴所构成的平面，称为子午面。
弧矢面(sagittal surface)，过光轴外物点的主光线(主光束)，并与子午面垂直的平面，称为弧矢面。
场曲(curvature of field)，场曲用于表示非中心视场光线经过光学镜头组后的最清晰像点位置与中心视场最清晰像点位置在光轴向的差异。当透镜存在场曲时，整个光束的交点不与理想像点重合，虽然在每个特定点都能得到清晰的像点，但整个像平面则是一个曲面。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请实施例中，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一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
如图1～图3所示，本申请实施例提供一种电子设备100，包括壳体20和摄像头模组10，摄像头模组10安装于壳体20上，摄像头模组10包括光学镜头1和感光元件2，感光元件2设置于光学镜头1的像侧。
其中，电子设备100可以是手机、平板电脑、手提电脑、可穿戴设备等具有拍照或摄像功能的设备。本实施例中，电子设备100以手机为例进行描述。
电子设备100包括壳体20、显示屏30以及摄像头模组10。一些实施例中，壳体20包括边框21和后盖22。其中，边框21与后盖22可以为一体成型结构，也可以通过组装方式形成一体式结构。显示屏30和后盖22分别安装于边框21的两侧，共同围设出容纳空间201，摄像头模组10收容于容纳空间201中。
一些实施例中，电子设备100还包括处理器(图中未示出)，处理器收容于容纳空间201中。处理器与摄像头模组10通信连接，处理器用于从摄像头模组10获取图像数据，并处理图像数据，然后把处理后的信号传到显示器上。其中，摄像头模组10与处理器的通信连接可以包括通过走线等电连接方式进行数据传输，也可以通过耦合等方式实现数据传输。可以理解的是，摄像头模组10与处理器还可以通过其它能够实现数据传输的方式实现通信连接。
本实施例中，后盖22上开设有摄像孔，摄像头模组10通过摄像孔采集光线，摄像头模组10作为电子设备100的后置摄像头。具体地，本申请中的摄像头模组10可以安装在电子设备100背面的左上角、上部中间或右上角，在此不做具体限定。
摄像头模组10除了可以安装在电子设备100背面，作为后置摄像头使用以外，摄像头模组10也可以作为电子设备100的前置摄像头，在此不做具体限定。
当然，摄像头模组10除了可以直接设置在电子设备100以外，也可以通过辅助部件可拆卸连接在电子设备100上，这样，便于摄像头模组10的拆装，该辅助部件可相对电子设备100转动或移动，辅助部件与电子设备100可通过螺接、卡接等卡拆卸连接方式，在此不做具体限定。
如图3所示，在一些实施例中，摄像头模组10包括光学镜头1、感光元件2以及滤光片3。感光元件2位于光学镜头1的像侧。滤光片3可以位于光学镜头1与感光元件2之间，使得光线能够穿过光学镜头1照射到感光元件2的感光面。
摄像头模组10的工作原理为：被摄景物反射的光线通过光学镜头1生成光学图像投 射到感光元件2的感光面，感光元件2将光学图像转为电信号即模拟图像信号并传输给处理器。
其中，感光元件2(也称为图像传感器)是一种半导体芯片，表面包含有几十万到几百万的光电二极管，受到光照射时，会产生电荷。感光元件2可以是电荷耦合器件(charge coupled device，CCD)，也可以是互补金属氧化物导体器件(complementary metal-oxide semiconductor，CMOS)。CCD是用一种高感光度的半导体材料制成，能把光线转变成电荷。电荷藕合器件由许多感光单位组成，通常以百万像素为单位。当感光元件2的表面受到光线照射时，每个感光单位会将电荷反映在组件上，所有的感光单位所产生的信号加在一起，就构成了一幅完整的画面。
其中，滤光片3用于滤除光线中不需要的波段，防止感光元件2产生伪色或波纹，以提高其有效分辨率和彩色还原性。具体地，滤光片3可以为红外滤光片，其中，本实施例中滤光片3为独立部件，也可以取消滤光片3结构件，通过在光学镜头1的其中一个透镜或者棱镜的至少一个表面上贴附滤光膜层或者采用滤光材料，以实现滤光，在此不做具体限定。
其中，光学镜头1主要利用透镜的折射原理进行成像，即景物光线通过光学镜头1，在焦平面上形成清晰的影像，并通过位于焦平面上的感光元件2记录景物的影像。
具体地，光学镜头1可以是直立式镜头或者是潜望式镜头，本实施例以光学镜头1是潜望式镜头为例进行描述。光学镜头1为潜望式镜头时，能够有效减小光学镜头1沿光轴的纵向的尺寸，当将光学镜头1放置在壳体20的容纳空间201中时，占用容纳空间201沿电子设备100厚度方向上的空间尺寸，进而更好地适用于薄型电子设备100中。
图3～图5，以及图6a、图6b和图6c示出了第一实施例中的摄像头模组10中的光学镜头1的结构图及仿真效果图。
如图3所示，光学镜头1包括沿物侧到像侧排列的第一透镜组G1、第二透镜组G2以及第三透镜组G3，第一透镜组G1具有正光焦度，第二透镜组G2具有负光焦度，第三透镜组G3具有负光焦度。通过合理控制第一透镜组G1的有效焦距fg1与光学镜头1的有效焦距f，有利于使得第一透镜组G1的有效焦距fg1与第二透镜组G2的有效焦距fg2的负光焦度相平衡，使光学镜头1具有长焦特性的基础上，实现减小像差、提升成像质量的目的。
如图2和图3所示，在一些实施例中，光学镜头1的第一透镜组G1包括曲面棱镜，光学镜头1的曲面棱镜包括入射面S1、出射面S3以及反射面S2，光学镜头1的反射面S2与光学镜头1的出射面S3之间的夹角为锐角，光学镜头1的入射面S1连接于光学镜头1的反射面S2和光学镜头1的出射面S3之间，且光学镜头1的入射面S1为凸面。
这样可以将入射光线经过曲面棱镜的反射面S2反射后进行偏转，进而有效缩短光学镜头的长度，有利于光学镜头的小型化；另外将入射面设计成凸面，也就是向物侧凸起，有利于增加光学镜头的通光孔径，实现大光圈，使得光学镜头在相对较小、较薄的情况下能够很好地校正像差，进而提升成像质量。
本申请实施例中的曲面棱镜可以为一体成型的异形三棱镜，如具有曲面的异形直角三棱镜，这样可将入射光线进行90°偏转，使得光学镜头1具有长焦特性的同时，有效缩短光学镜头1沿光轴上的长度，如图3所示的横向的尺寸，有利于实现光学镜头1的小型化 设计，将光学镜头1设置在电子设备100厚度有限的容纳空间201中，进而减小电子设备100的厚度，使得电子设备100实现轻薄化。当然，上述曲面棱镜除了可以一体成型以外，当电子设备100的容纳空间201充足时，也可以将上述曲面棱镜通过透镜和直角三棱镜进行胶合或者组合形成上述具有正光焦度的棱镜，直角三棱镜和透镜的材料可以相同或者不同，根据实际进行选择设计，在此不做具体限定。
当然，上述曲面棱镜除了为曲面棱镜以外，当电子设备100的容纳空间201充足时，也可以采用直透式透镜，且具有正光焦度，在此不做具体限定。
当然，第一透镜组G1除了包括曲面棱镜、透镜二L2和透镜三L3以外，也可以结合光学镜头1的光焦度及长焦特性等性能参数只在曲面棱镜的像侧设置一个透镜、多个透镜或者在曲面棱镜后面不设置透镜，在此不做具体限定。
如图3所示，在一些实施例中，入射面S1为非球面。通过将曲面棱镜的入射面S1设计成非球面，减小了光学镜头1沿光轴方向的尺寸，进一步有利于增加光学镜头1的通光孔径，实现大光圈，使得光学镜头1在相对较小、较薄的情况下能够很好地校正像差，进而提升成像质量。
如图3所示，在一些实施例中，光学镜头1的曲面棱镜为玻璃棱镜，光学镜头1的第一透镜组G1还包括设置于光学镜头1出射面的像侧的至少一个透镜，光学镜头1至少一个透镜中，最靠近光学镜头1曲面棱镜的透镜为球面透镜。
通过将最靠近曲面棱镜的透镜设计成球面透镜，这样，有利于降低加工难度，方便该透镜在必要时刻可以与曲面棱镜的像侧面进行胶合，进而有效消除色差和球差，提高成像质量。
具体地，第一透镜组G1包括具有正光焦度的透镜一L1，也就是上述曲面棱镜、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3。其中，透镜二L2为玻璃球面透镜。由于玻璃球面透镜具有高折射率、高阿贝数，且易于加工成型，这样，通过将靠近曲面棱镜的透镜二L2设计成与曲面棱镜相同的玻璃制成，方便将透镜二L2与曲面棱镜的物侧面相胶合连接，以消除光学镜头1的色差和球差，使得光学镜头1具有较高的成像质量且控制成本低。这样，方便将透镜二L2与透镜一L1也就是上述曲面棱镜的物侧面胶合，消除第一透镜组G1的色差和球差，进而从整体上减小光学镜头1的像差，提高成像质量。当然透镜二L2除了为玻璃球面透镜以外，也可以设计成其他可透光材质，如树脂或者合成材料，这样使得光学镜头1的重量比较轻，透镜二L2的形状参数及材料可根据实际情况进行选择设计，在此不做具体限定。
同样的，透镜三L3的材料可以为玻璃，也可以为其他可透光材质，如树脂或者合成材料，透镜三L3的形状参数及材料可根据实际情况进行选择设计，在此不做具体限定。
如图3所示，在一些实施例中，光学镜头1的第二透镜组G2和光学镜头1的第三透镜组G3均包括多个透镜。第二透镜组G2和第三透镜组G3的多个透镜之间合理布局，有利于光学镜头1光焦度的合理分配，与第一透镜组G1的光焦度相平衡，兼顾长焦特性、高成像质量以及光学镜头1小型化的目的。
如图3所示，在一些实施例中，第二透镜组G2包括两个透镜，光学镜头1两个透镜胶合在一起，并且光学镜头1的第二透镜组G2中的两个透镜均为玻璃球面透镜。由于玻璃具有高的折射率、阿贝数，很好地消除色差，提高成像质量，且玻璃球面透镜易加工， 使得第二透镜组G2的两个透镜加工和组装如胶合精度高，且成本低；通过将两个透镜胶合在一起，不仅可以消除色差和球差，而且使得胶合面处的光线，入射角度可以做到很大，这样可以产生更多的高级像差，来抵消初级像差，实现像差平衡。
其中，第二透镜组G2中的两个透镜的折射率可以相同，也可以不同，当然，第二透镜组G2中的两个透镜除了均为玻璃球面透镜以外，也可以采用不同材料的球面透镜，或者可根据实际情况选择多个透镜组合形成负光焦度的第二透镜组G2，以平衡第一透镜组G1的正光焦度，在此不做具体限定。
当光学镜头1具有长焦特性时，在进行远景拍摄的时候，很容易因为抖动的原因造成糊片，且变焦倍率越大，抖动越明显。最直观的体现就是拍视频，其次是成片率，防抖越好，成片越高，用户就能抓拍到成功的照片，有了光学防抖就可以提高成片率。因此，在兼顾长焦特性的小型化的光学镜头1设计时，光学防抖对于小型化长焦镜头的成片质量显得尤为重要。
如图3～图5所示，在一些实施例中，光学镜头1的第二透镜组G2可沿垂直于光轴的方向相对光学镜头1的第一透镜组G1移动，也就是说第二透镜组G2可沿图2中的纵向移动。这样使得光学镜头1具有光学防抖功能，也就是说，当用户在拍照手抖动时，光学镜头1可通过第二透镜组G2的移动抵消手抖动时在该方向上造成的光线偏移，提高成片质量。
需要说明的是，光学防抖主要是通过镜片的运动来补偿相机的晃动，它依靠相机内置的精密陀螺仪和一组可移动镜片，如本实施例中的第二透镜组G2，精密陀螺仪能够准确检测到手的抖动，并将它转化为电信号，经过镜头内置的处理器之后，控制第二透镜组G2移动，修正手抖造成的光线偏移，避免模糊，进而提高成片质量。
当然，也可以通过高感光度技术达到防抖的效果，高感光度技术的原理比较简单，就是通过增加感光度ISO值来提高快门速度进而达到防抖效果。也可以光学防抖和高感光度结合，使光学镜头1具有双重防抖功能，进一步提高成片质量，在此不做具体限定。
如图3所示，在一些实施例中，光学镜头1的第三透镜组G3包括四个透镜，分别为透镜五L5、透镜六L6、透镜七L7、透镜八L8，光学镜头1的四个透镜中，沿物侧到像侧方向，第一个透镜，也就是第三透镜组G3中的透镜五L5和第四个透镜也就是第三透镜组G3中的透镜八L8均具有光焦度，第二个透镜也就是第三透镜组G3中的透镜六L6具有负光焦度，第三个透镜也就是第三透镜组G3中的透镜七L7具有正光焦度。
综上，如图3所示，在第一实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有负光焦度的透镜八L8。
其中：透镜一L1包括物侧面S1、反射面S2和像侧面S3，透镜二L2包括物侧面S4和像侧面S5，透镜三L3包括物侧面S6和像侧面S7，透镜四L4包括两个物侧面S8、S10和两个像侧面S9、S11物侧面和像侧面沿光轴交替排列，透镜五L5包括物侧面S12和像侧面S13，透镜六L6包括物侧面S14和像侧面S15，透镜七L7包括物侧面S16和像侧面S17，透镜八L8包括物侧面S18和像侧面S19。另外，摄像头模组10还有一虚拟的成像面和光阑STO，成像面位于透镜八L8的像侧，光阑STO位于第二透镜组G2的第一个物 侧面，也就是透镜四L4的物侧面S8处。一般地，摄像头模组10的成像面与感光元件2的感光表面重合。
透镜的物侧面和像侧面均可由面的中心向径向划分为光轴处和圆周处区域。当描述透镜的一个表面于光轴处(该面的中心区域)为凸面时，可理解为该透镜的该表面于光轴附近的区域为凸面。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，当该表面于光轴处为凸面，且于圆周处也为凸面时，该表面由中心(光轴)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，但一些实施例中的其他情况可根据以上示例推出，此处不加以赘述。
如图3所示，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为平面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为平面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凸面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凹面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凹面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凸面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凸面，像侧面S17于圆周处为凹面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
如图3和图6a、图6b和图6c所示，图6a、图6b以及图6c分别为本申请第一实施例中的光学镜头1的轴向球面像差图((Longitudinal Spherical Aberration)、场曲图(Astigmatic Field Curves)和畸变图(Distortion)，以下各实施例(第一实施例至第八实施例)的像散图和畸变图的参考波长均为546nm。
以下结合光学镜头1的主要参数的数据和仿真效果图的结果，呈现第一实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距、色散系数也即阿贝数。表1b是第一实施例中的各透镜的非球面系数。
需要说明的是，表1a中的曲率半径为相对应表面编号的镜头，也就是每个面序号所对应的镜头的物侧面或像侧面于光轴处的曲率半径，镜头于“曲率半径”参数数列中的“无限”指的是该镜头的物侧面或者像侧面为平面；每个镜头于“厚度”参数数列中的第一个数值为该镜头于光轴上的厚度，第二个数值为该镜头的像侧面至后一个镜头的物侧面于光轴上的距离；光阑STO于“厚度”参数数列中的数值为光阑STO的中心至后一镜头的物侧面于光 轴上的距离。
以下各个实施例中的光学镜头1的非球面，可以利用但不限于以下非球面曲线方程式进行限定：
其中，z为非球面上距离光轴为r的点，其与相切于非球面光轴上交点切面的相对距离；r为非球面曲线上的点与光轴的垂直距离；c为曲率；k为锥面系数；αi为第i阶非球面系数，可参阅表1b。
在第一实施例中，光学镜头1的有效焦距f＝14.95mm，第一透镜组G1的组合焦距fg1＝84.39mm，第二透镜组G2的有效焦距fg2＝-40.82mm，光圈FNO＝2.0，视场角FOV＝27.2°，光学镜头1的光学总长TTL为25.63mm。第一实施例中的光学镜头1的参数满足表1c所示的关系。
表1a
表1b
表1c
注：以下各个实施例中的光学镜头1的关系的注释说明：
f为光学镜头1的有效焦距，等于光学镜头1的EFL值；
fg1为第一透镜组G1的有效焦距，即第一透镜组G1中的透镜一L1、透镜二L2和透镜三L3的组合焦距；
fg2为第二透镜组G2的有效焦距，也就是透镜四L4的焦距；
f’为第三透镜组G3中的第三个透镜的焦距和第四个透镜之和，也就是透镜七L7的焦距f7和透镜八L8的焦距f8之和，即f’＝f7+f8；
TTL为光学总长，是指由光学镜头1中的第一面到像面的距离；
AT12为第一透镜组G1和第二透镜组G2在光轴上的间距，这里指的是透镜三L3和透镜四L4在光轴上的间距；
AT23为第二透镜组G2和第三透镜组G3在光轴上的间距，这里指的是透镜四L4和 透镜五L5在光轴上的间距；
EPD为光学镜头1的入瞳直径，也叫做入瞳孔径；
f/EPD的比值等于光圈FNO，用来决定光学镜头1的明暗。通常光圈FNO为2.8，本申请中的光圈FNO为2.01，使得光学镜头1的通光孔径增大，成像质量好；
R2为第三透镜组G3中的第二个透镜的物侧面与像侧面的曲率半径之和，也就是透镜六L6的物侧面与像侧面的曲率半径之和；
R3为第三透镜组G3中的第三个透镜的物侧面与像侧面的曲率半径之和，也就是透镜七L7的物侧面与像侧面的曲率半径之和；
结合图3第一实施例中的光学镜头1的结构示意图、以及表1a和1b给出的第一实施例中的光学镜头1的主要参数满足表1c的关系时，通过仿真模拟得到图6a、图6b和图6c所示的仿真效果图。
其中，图6a中的轴向球面像差图表示于光轴处不同波长的光线经由光学镜头1后的汇聚焦点与理想像面的偏离。轴向球面像差图的纵坐标表示归一化的由入瞳中心至入瞳边缘的入瞳坐标(Normalized Pupil Coordinator)，横坐标表示光线汇聚像面与理想像面的偏离距离(单位为mm)。由轴向球面像差图可知，第一实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；其中，图6b中的场曲图中的X曲线代表弧矢场曲，Y曲线代表子午场曲。由图6b中的场曲图中可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；由图6c中的畸变图中可知，第一实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第一实施例中的光学镜头1实现了长焦特性以及成像质量高的目的。
图7、图8a、图8b、以及图8c示出了第二实施例中的摄像头模组10中的光学镜头1的结构示意图以及仿真效果图。
如图7所示，在第二实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有负光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为平面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为平面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凸面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凸面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凸面，像侧面S17于圆周处为凹面。透镜八L8的 物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表2a和表2b给出第二实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表2b是第二实施例中的各透镜的非球面系数。
在第二实施例中，光学镜头1的有效焦距f＝14.95mm，第一透镜组G1的组合焦距fg1＝41.23mm，第二透镜组G2的有效焦距fg2＝-24.64mm，光圈FNO＝2.01，视场角FOV＝27.0°，光学镜头1的光学总长TTL为25.4mm。第二实施例中的光学镜头1的参数满足表2c所示的关系。
表2a
表2b
表2c
结合图7给出的第二实施例中的光学镜头1的结构示意图，以及表2a和2b给出的第二实施例中的光学镜头1的主要参数满足表2c的关系时，通过仿真模拟得到图8a、图8b和图8c所示的仿真效果图，图8a、图8b和图8c分别为第二实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图8a中的轴向球面像差图可知，第二实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图8b和图8c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图8c中的畸变图中可知，第二实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第二实施 例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图9、图10a、图10b以及图10c示出了第三实施例中的摄像头模组10中的光学镜头1的结构示意图以及仿真效果图。
如图9所示，在第三实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有正光焦度的透镜二L2、具有负光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有负光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为凹面，像侧面S5于光轴处为凹面；物侧面S4于圆周处为凹面，像侧面S5于圆周处为凹面。透镜三L3的物侧面S6于光轴处为凹面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凹面。透镜六L6的物侧面S14于光轴处为凸面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凸面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凸面，像侧面S17于圆周处为凹面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表3a和表3b给出第三实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表3b是第三实施例中的各透镜的非球面系数。
在第三实施例中，光学镜头1的有效焦距f＝14.93mm，第一透镜组G1的组合焦距fg1＝15.97mm，第二透镜组G2的有效焦距fg2＝-7.58mm，光圈FNO＝2.0，视场角FOV＝26.2°，光学镜头1的光学总长TTL为23.3mm。
第三实施例中的光学镜头1的参数满足表3c所示的关系。
表3a
表3b
表3c
结合图9给出的第三实施例中的光学镜头1的结构示意图，以及结合表3a和3b给出的第三实施例中的光学镜头1的主要参数满足表3c的关系时，通过仿真模拟得到图10a、图10b和图10c所示的仿真效果图，图10a、图10b和图10c分别为第三实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图10a中的轴向球面像差图可知，第三实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图10b和图10c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图10c中的畸变图中可知，第三实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第三实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图11、图12a、图12b以及图12c示出了第四实施例中的摄像头模组10中的光学镜头 1的结构示意图以及仿真效果图。在第四实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有负光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。透镜二L2的物侧面S4于光轴处为凸面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为凸面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凸面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。
透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凹面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凹面，像侧面S17于圆周处为凹面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表4a和表4b给出第四实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表4b是第四实施例中的各透镜的非球面系数。
在第四实施例中，光学镜头1的有效焦距f＝14.95mm，第一透镜组G1的组合焦距fg1＝20.65mm，第三透镜组G3的有效焦距fg2＝-8.84mm，光圈FNO＝2.0，视场角FOV＝27.0°，光学镜头1的光学总长TTL为24.4mm。
第四实施例中的光学镜头1与第一实施例至第三实施例中的光学镜头1的主要区别在于：第四实施例中的光学镜头1的参数满足表4c所示的关系。
表4a
表4b
表4c
结合图11给出的第四实施例中的光学镜头1的结构示意图，以及表4a和4b给出的第四实施例中的光学镜头1的主要参数满足表2c的关系时，通过仿真模拟得到图12a、图12b和图12c所示的仿真效果图，图12a、图12b和图12c分别为第二实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图12a中的轴向球面像差图可知，第四实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图12b和图12c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图12c中的畸变图中可知，第四实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第四实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图13、图14a、图14b以及图14c示出了第五实施例中的摄像头模组10中的光学镜片 的结构示意图以及仿真效果图。
如图13所示，在第五实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3、具有负光焦度的透镜四L4、正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有正光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为凸面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为凸面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凸面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凹面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凹面，像侧面S17于圆周处为凹面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表5a和表5b给出第五实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表5b是第五实施例中的各透镜的非球面系数。
在第五实施例中，光学镜头1的有效焦距f＝15.1mm，第一透镜组G1的组合焦距fg1＝14.63mm，第二透镜组G2的有效焦距fg2＝-23.05mm，光圈FNO＝2.01，视场角FOV＝26.8°，光学镜头1的光学总长TTL为24.5mm。第五实施例中的光学镜头1的参数满足表5c所示的关系。
表5a
表5b
表5c
结合图13给出的第五实施例中的光学镜头1的结构示意图，以及表5a和5b给出的第五实施例中的光学镜头1的主要参数满足表5c的关系时，通过仿真模拟得到图14a、图14b和图14c所示的仿真效果图，图14a、图14b和图14c分别为第五实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图14a中的轴向球面像差图可知，第五实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图14b和图14c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图14c中的畸变图中可知，第五实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第五实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图15、图16a、图16b和图16c示出了第六实施例中的摄像头模组10中的光学镜片的结构示意图以及仿真效果图。
如图15所示，在第六实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有负光焦度的透镜二L2、具有正光焦度的透镜三L3、具有负光焦度的透镜四L4、具有负光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有正光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为凸面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为凸面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凸面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凸面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凸面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凹面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凹面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凹面，像侧面S17于圆周处为凹面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表6a和表6b给出第六实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表6b是第六实施例中的各透镜的非球面系数。
在第六实施例中，光学镜头1的有效焦距f＝14.95mm，第一透镜组G1的组合焦距fg1＝9.27mm，第二透镜组G2的有效焦距fg2＝-23.28mm，光圈FNO＝2.1，视场角FOV＝27.2°，光学镜头1的光学总长TTL为26.2mm。第六实施例中的光学镜头1的参数满足表6c所示的关系。
表6a
表6b
表6c
结合图15给出的第六实施例中的光学镜头1的结构示意图，以及表6a和6b给出的第二实施例中的光学镜头1的主要参数满足表6c的关系时，通过仿真模拟得到图16a、图16b和图16c所示的仿真效果图，图16a、图16b和图16c分别为第六实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图16a中的轴向球面像差图可知，第六实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图16b和图16c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图16c中的畸变图中可知，第六实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第六实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图17、图18a、图18b以及图18c示出了第七实施例中的摄像头模组10中的光学镜片 的结构示意图以及仿真效果图。
如图17所示，在第七实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有正光焦度的透镜二L2、具有负光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有正光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为凸面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为凸面，像侧面S5于圆周处为凸面。透镜三L3的物侧面S6于光轴处为凹面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凹面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凹面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凸面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凸面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凹面，像侧面S17于圆周处为凸面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表7a和表7b给出第七实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表7b是第七实施例中的各透镜的非球面系数。
在第七实施例中，光学镜头1的有效焦距f＝12.95mm，第一透镜组G1的组合焦距fg1＝11.52mm，第二透镜组G2的有效焦距fg2＝-44.98mm，光圈FNO＝2.0，视场角FOV＝31.3°，光学镜头1的光学总长TTL为26.3mm。第七实施例中的光学镜头1的参数满足表7c所示的关系。
表7a
表7b
表7c
结合图17给出的第七实施例中的光学镜头1的结构示意图，以及表7a和7b给出的第七实施例中的光学镜头1的主要参数满足表7c的关系时，通过仿真模拟得到图18a、图18b以及图18c所示的仿真效果图，图18a、图18b以及图18c分别为第七实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图18a中的轴向球面像差图可知，第七实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图18b和图18c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图18c中的畸变图中可知，第七实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第七实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
图19、图20a、图20b以及图20c示出了第八实施例中的摄像头模组10中的光学镜片的结构示意图以及仿真效果图。
如图19所示，在第八实施例中，光学镜头1包括沿物侧到像侧排列的具有正光焦度的透镜一L1、具有正光焦度的透镜二L2、具有负光焦度的透镜三L3、具有负光焦度的透镜四L4、具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有正光焦度的透镜八L8。
其中，透镜一L1的物侧面S1于光轴处向像侧凸起(简称：凹面)，反射面S2于光轴处为平面，像侧面S3于光轴处为平面；物侧面S1于圆周处向物侧凸起(简称：凸面)，反射面S2于圆周处为平面，像侧面S3于圆周处为平面。
透镜二L2的物侧面S4于光轴处为凹面，像侧面S5于光轴处为凸面；物侧面S4于圆周处为凹面，像侧面S5于圆周处为凹面。透镜三L3的物侧面S6于光轴处为凹面，像侧面S7于光轴处为凹面；物侧面S6于圆周处为凸面，像侧面S7于圆周处为凹面。透镜四L4的物侧面S8于光轴处为凹面，像侧面S11于光轴处为凹面；物侧面S8于圆周处为凹面，像侧面S11于圆周处为凹面。透镜五L5的物侧面S12于光轴处为凸面，像侧面S13于光轴处为凸面；物侧面S12于圆周处为凸面，像侧面S13于圆周处为凸面。透镜六L6的物侧面S14于光轴处为凹面，像侧面S15于光轴处为凸面；物侧面S14于圆周处为凸面，像侧面S15于圆周处为凸面。透镜七L7的，物侧面S16于光轴处为凸面，像侧面S17于光轴处为凹面，物侧面S16于圆周处为凹面，像侧面S17于圆周处为凸面。透镜八L8的物侧面S18于光轴处为凸面，像侧面S19于光轴处为凸面；物侧面S18于圆周处为凸面，像侧面S19于圆周处为凸面。
综上，在该实施例中八个镜头中的每个镜头于光轴处的于圆周处的面型凹凸情况详见后面的表9～表11。
表8a和表8b给出第八实施例中的摄像头模组10中的光学镜头1中的各透镜和滤光片3的曲率半径、间隔、折射率(Nd)、阿贝数、焦距等参数。其中，间隔包括透镜本身的厚度和透镜之间的间距。色散系数也即阿贝数。表8b是第八实施例中的各透镜的非球面系数。
在第八实施例中，光学镜头1的有效焦距f＝14.95mm，第一透镜组G1的组合焦距fg1＝10.88mm，第二透镜组G2的有效焦距fg2＝-24.88mm，光圈FNO＝2.01，视场角FOV＝24.5°，光学镜头1的光学总长TTL为26.3mm。第八实施例中的光学镜头1的参数满足表8c所示的关系。
表8a
表8b
表8c
图19给出的第八实施例中的光学镜头1的结构示意图，结合表8a和8b给出的第八实施例中的光学镜头1的主要参数满足表8c的关系时，通过仿真模拟得到图18a、图18b以及图18c所示的仿真效果图，图18a、图18b以及图18c分别为第八实施例中的光学镜头1的轴向球面像差图(Longitudinal Spherical Aberration)，场曲图(Astigmatic Field Curves)和畸变图(Distortion)。
从图20a中的轴向球面像差图可知，第八实施例中的光学镜头1，各波长光线的汇聚焦点偏离程度及与理想像面的偏离在一个很小的范围内，成像画面中的球差得到较好校正；从图18b和图18c中的场曲图和畸变图可知，弧矢场曲和子午场曲均被控制在较小范围以内，反映出成像面的弯曲得到较好控制；从图20c中的畸变图中可知，第八实施例中的光学镜头1的畸变较小，意味着由主光束引起的图像变形较小，成像失真效果低。综上，第八实施例中的光学镜头1实现了长焦特性、结构小型化以及成像质量高的目的。
综上所述，上述第一实施例至第八实施例中的光学镜头1的结构、主要参数除了以上的区别以外，光学镜头1种各透镜的光焦度、面型方向也存在不同，具体如表9～表11所示。其中，表9为第一实施例至第八实施例中的八个光学镜头1分别包括的透镜一L1至透镜八L8的光焦度的正负情况；表10为第一实施例至第八实施例中的八个光学镜头1分别包括的透镜一L1至透镜八L8的物侧面或者像侧面于光轴处的凹凸情况；表11为第一实施例至第八实施例中的八个光学镜头1分别包括的透镜一L1至透镜八L8的物侧面或者像侧面于圆周处的凹凸情况。
表9
表9中的“+”和“-”代表的是每个镜头的光焦度的正负情况。其中，“+”代表的是镜头具有正光焦度；“-”代表的是镜头具有负光焦度。
表10
需要说明的，表10中的“-∞”、“∞+”、“+-”、“-+”、“++”、“--”，代表的是每个镜头中的物侧面或像侧面于光轴处的凹凸情况。其中，“-∞”代表的镜头的物侧面于光轴处向像侧凸起，像侧面于光轴处为平面；“∞+”代表的是镜头的物侧面于光轴处为平面，像侧面于光轴处向物侧凸起；“+-”代表的是镜头的物侧面于光轴处向物侧凸起，像侧面于光轴处向像侧凸起；“-+”代表的是镜头的物侧面于光轴处向像侧凸起，像侧面于光轴处向物侧面图区；“++”代表的是镜头的物侧面和像侧面光轴处均向物侧凸起；“--”代表的是镜头的物侧面和像侧面光轴处均向像侧凸起。
表11
需要说明的，表11中的“-(”、“(-”、“)(”、“()”代表的是每个镜头中的物侧面或像侧面于圆周处的凹凸情况。其中，“(-”代表的是镜头的物侧面于圆周处向物侧凸起，像侧面于圆周处为平面；“-(”代表的是镜头的物侧面为平面，像侧面于圆周处向物侧凸起；“)(”代表的是镜头的物侧面于圆周处向像侧凸起，像侧面于圆周处向物侧凸起；“()”代表的是镜头的物侧面于圆周处向物侧凸起，像侧面于圆周处向物侧凸起。
综上所述，本申请上述八个实施例中的光学镜头1的主要参数满足以下关系：
在一些实施例中，光学镜头1第一透镜组G1的有效焦距fg1与光学镜头1的有效焦距f满足：0.65<fg1/f<5.6。
需要说明的是，fg1/f是光学镜头1的重要参数.该参数在第一实施例至第八实施例中的数值如表12所示：
表12
该参数在第八实施例中该参数的数值最小，为0.68；该参数在第一实施例中该参数的数值最大，为5.64。
结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图，可以推出，当该参数的数值过大时，当光学镜头1满足长焦时，会导致第一透镜组G1中的透镜一L1，也就是曲面棱镜沿光轴横向尺寸变大，进而造成光学镜头1沿光轴的横向尺寸变大；当该参数的数值过小时，是的光学镜头1的有效焦距f变小，第二透镜组G2和第三透镜组G3补偿不过来，导致有效焦距f值减小，达不到长焦特性。通过合理控制该参数数值，使当该参数数值满足上述关系时，八个实施例中的光学镜头1的有效焦距f大约在13mm～16mm之间，光学镜头1具有长焦特性，有利于使得第一透镜组G1的正光焦度与第二透镜组G2的负光焦度以及第三透镜组G3中的具有正光焦度的透镜相平衡，八个实施例中的光学镜头1的像差均得到很好地控制，进而有效提升光学镜头1的成像质量，使得光学镜头1在满足长焦特性的基础上，有效提高光学镜头1成像质量，达到兼顾长焦特性和高成像质量 的目的。
在一些实施例中，光学镜头1第一透镜组G1的有效焦距fg1与光学镜头1的有效焦距f满足：fg1/f<1。当fg1/f满足fg1/f<1关系时，如第五实施例至第八实施中的光学镜头1，从相应的仿真效果图可以看出，第五实施例至第八实施中的光学镜头1与第一实施例至第四实施中的光学镜头1相比，进一步减小了光学镜头1的球差，进而提升成像质量。
在一些实施例中，光学镜头1的第二透镜组G2的有效焦距fg2与光学镜头1的有效焦距f满足：-3.5<fg2/f<0。
需要说明的是，fg2/f是光学镜头1的重要参数。该参数在第一实施例至第八实施例中的数值如表13所示：
表13
该参数在第三实施例中该参数的数值最大，为-0.51，对应的光学镜头1的光学总长TTL＝23.3mm；该参数在第七实施例中该参数的数值最小，为-3.47，对应的光学镜头1的光学总长TTL＝26.3mm。
结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图，可以推出，当该参数数值过小时，会造成光学镜头1的有效焦距f减小，光学总长TTL过长，不利于光学镜头1的兼顾长焦特性和小型化设计。当该参数满足上述关系时，通过合理控制该参数的数值，可有效平衡光学镜头1中的第一透镜组G1的正光焦度，实现长焦特性，同时避免光学镜头1中第三透镜组G3沿光轴横向尺寸太大，造成光学总长TTL过长，进而使得光学镜头1可以兼顾长焦特性和小型化设计。
在一些实施例中，光学镜头1的第三个透镜和光学镜头1的第四个透镜的有效焦距之和fˊ和光学镜头1的第二透镜组G2的有效焦距fg2满足：-1.2<fg2/fˊ<8.5。
需要说明的是，fg2/f是光学镜头1的重要参数，其中，fg2为第二透镜组G2的有效焦距，也就是透镜四L4的焦距；f’为第三透镜组G3中的第三个透镜的焦距和第四个透镜之和，也就是透镜七L7的焦距f7和透镜八L8的焦距f8之和，即f’＝f7+f8。该参数在第一实施例至第八实施例中的数值如表14所示：
表14
从表14可以看出，该参数在第五实施例中数值最小，为-1.17，在第一实施例中数值最大，为8.25。
结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图，可以推出，当该参数满足上述关系时，八个实施例中光学镜头1的f’从第四实施例中的-10.27mm到第七实施例中的51.46mm跨度比较大，也就是说，光学镜头1中即透镜七L7的焦距f7和透镜八L8的焦距f8之和f’这个参数对光学镜头1的性能影响比较小，进而可以得到，当该参数满足上述关系时，存在比较大的空间范围调整第三透镜G3中各透镜的焦距，以使光学镜头1在尽可能的减小对光学镜头1的性能的影响的前提下，可以有效平衡各透镜组的光焦度，进而减小球差，提升成像质量。
在一些实施例中，光学镜头1的光学总长TTL与光学镜头1的有效焦距f满足：TTL/f<2.1。
需要说明的是，TTL/f是光学镜头1的重要参数。该参数在第一实施例至第八实施例中的数值如表15所示：
表15
从表15可以看出，该参数在第四实施例中数值最小，为1.61，对应的光学总长TTL为24.4mm；在第七实施例中数值最大，为2.03，对应的光学总长TTL为26.3mm，光学镜头1的有效焦距f约为13mm，相对于其他实施例中的光学镜头1的有效焦距f约为15mm，减小了2mm左右。可以推出，该参数过大时，意味着光学镜头1的光学总长TTL增加，同时有效焦距f也相对减小，不利于光学镜头1实现长焦特性及小型化设计。当该参数满足上述关系时，可使得光学镜头1有效兼顾满足长焦特性以及达到小型化设计的目的。
在一些实施例中，光学镜头1的入瞳直径EPD与光学镜头1的有效焦距f满足：f/EPD<2.1。
需要说明的是，f/EPD是光学镜头1的重要参数，也就是光圈FNO。该参数在第一实施例至第八实施例中的数值如表16所示：
表16
从表16可以看出，该参数在第一实施例至第八实施例中均约为2，与传统的光学镜头1的该数值为2.8相比，有效降低，该参数数值越小，也就是光圈越小，景深越深，背景越清晰。结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图，可以推出，当该参数满足上述关系时，通过控制有效焦距f和入瞳直径EPD在上述范围内，使 得光学镜头1可以在具有长焦特性的基础上，增加光学***的大通光量，进而有效提升成像质量。也就是说，即使在较暗环境下拍摄，也能达到清晰的成像效果。
在一些实施例中，光学镜头1的第一透镜组G1、光学镜头1的第二透镜组G2在光轴上的间距AT12与光学镜头1的第二透镜组G2、光学镜头1的第三透镜组G3在光轴上的间距AT23满足：0.1<AT12/AT23<4.76。
需要说明的是，AT12/AT23是光学镜头1的重要参数。该参数在第一实施例至第八实施例中的数值如表17所示：
表17
从表17可以看出，该参数在第五实施例中数值最小，为0.19；在第七实施例中数值最大，为4.76。结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图可以推出，当该参数的数值过大或者过小时，均会导致光学镜头1的性能，如场曲，畸变变差。使当该参数数值满足上述关系时，有利于控制光学镜头1的像差，进而提升成像质量。
在一些实施例中，光学镜头1的第二透镜组G2中各个透镜的中心厚度之和ct2与光学镜头1的第三透镜组G3中各个透镜的中心厚度之和ct3满足：ct2/ct3≤1.3。
需要说明的是，ct2/ct3是光学镜头1的重要参数。该参数在第一实施例至第八实施例中的数值如表18所示：
表18
从表18可以看出，该参数在第三实施例中数值最小，为0.14；在第三实施例中数值最大，为1.28。结合第一实施例至第八实施例中该参数的数值，以及相对应的仿真效果图，可以推出，当该参数的数值增大时，场曲，畸变控制变差，也就可以推出当该参数的数值过大时，会导致光学镜头1中的其中一个或几个透镜的厚度变薄，且性能，如场曲，畸变受到影响。当光学镜头1的该参数数值满足上述关系时，有利于控制光学镜头1的像差，进而提升成像质量。
在一些实施例中，光学镜头1的第三透镜组G3中的第二个透镜的物侧面与像侧面的曲率半径之和R2与光学镜头1的第三透镜组G3中的第三个透镜的物侧面与像侧面的曲率半径之和R3满足：-1.5<R2/R3<12.5。
需要说明的是，R2/R3是光学镜头1的重要参数。该参数在第一实施例至第八实施例中的数值如表19所示：
表19
从表19可以看出，该参数在第四实施例中数值最小，为-1.12；在第三实施例中数值最大，为12.21，当该参数的数值增大时，场曲，畸变控制变差。结合第一实施例至第八实施例中的光学镜头1的结构示意图以及光学镜头1对应的该参数的数值，以及相对应的仿真效果图，可以推出，当该参数的数值过小时，会导致光学镜头1中的第三透镜G3中多个透镜的物侧面或像侧面接***面，也就是焦距较小，光线会聚或者发散的能力减弱，进而使得光学镜头1中多个透镜之间的间隔减小，沿光轴排列较密集，增加了光学镜头1设计的难度。
当该参数的数值过大时，会导致光学镜头1中的第三透镜G3中多个透镜存在至少一个透镜厚度较薄，参考如图9所示的第三实施例中的光学镜头1的结构，第三透镜组G3中的第一个透镜也就是透镜五L5的厚度较薄，弯曲程度较大不好加工，另外，越靠近像侧面的透镜沿垂直于光轴方向上的尺寸越大，导致光学镜头1沿垂直于光轴方向上的整体尺寸过大，不利于光学镜头1的小型化设计；间接地可以得出光线在经过第二透镜组G2以后，在经过第三透镜组G3于圆周处的光线偏转角度较大，使得靠近像侧面的透镜沿垂直于光轴方向上的尺寸增加越多，那么相应地进入到像侧面上的有效光线将减少，不利于消除像差。
综上，该参数数值满足上述关系时，有利于合理设计光学镜头1中每个透镜的形状和参数，使得光学镜头1达到长焦特性、消除像差提高成像质量，以及控制成本的目的。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
本申请附图中剖面线的不同线型主要用于区分不同的零部件，不应理解为对零部件材料的限定。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (22)

  1. 一种光学镜头，其特征在于，包括沿物侧到像侧排列的第一透镜组、第二透镜组以及第三透镜组，所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度，所述第三透镜组具有光焦度；其中，所述第一透镜组的有效焦距fg1与所述光学镜头的有效焦距f满足：0.65<fg1/f<5.6。
  2. 根据权利要求1所述的光学镜头，其特征在于，
    所述第一透镜组的有效焦距fg1与所述光学镜头的有效焦距f满足：fg1/f<1。
  3. 根据权利要求1所述的光学镜头，其特征在于，
    所述第二透镜组的有效焦距fg2与所述光学镜头的有效焦距f满足：-3.5<fg2/f<0。
  4. 根据权利要求1所述的光学镜头，其特征在于，
    所述光学镜头的光学总长TTL与所述光学镜头的有效焦距f满足：TTL/f<2.1。
  5. 根据权利要求1所述的光学镜头，其特征在于，
    所述光学镜头的入瞳直径EPD与所述光学镜头的有效焦距f满足：f/EPD≤2.1。
  6. 根据权利要求1所述的光学镜头，其特征在于，
    所述第一透镜组、所述第二透镜组在光轴上的间距AT12与所述第二透镜组、所述第三透镜组在光轴上的间距AT23满足：0.1<AT12/AT23<4.76。
  7. 根据权利要求1所述的光学镜头，其特征在于，
    所述第二透镜组和所述第三透镜组均包括多个透镜；
    所述第二透镜组中各个透镜的中心厚度之和ct2与所述第三透镜组中各个透镜的中心厚度之和ct3满足：ct2/ct3≤1.3。
  8. 根据权利要求1所述的光学镜头，其特征在于，
    所述第三透镜组包括四个透镜，所述四个透镜中，沿物侧到像侧方向，第一个透镜和第四个透镜均具有光焦度，第二个透镜具有负光焦度，第三个透镜具有正光焦度；
    所述第三个透镜和所述第四个透镜的有效焦距之和fˊ和所述第二透镜组的有效焦距fg2满足：-1.2<fg2/fˊ<8.5；和/或，
    所述第二个透镜的物侧面与像侧面的曲率半径之和R2与所述第三个透镜的物侧面与像侧面的曲率半径之和R3满足：-1.5<R2/R3<12.5。
  9. 根据权利要求1～8中任一项所述的光学镜头，其特征在于，
    所述第二透镜组可沿垂直于光轴的方向相对所述第一透镜组移动。
  10. 根据权利要求1～8中任一项所述的光学镜头，其特征在于，
    所述第二透镜组包括两个透镜，所述两个透镜胶合在一起，并且所述两个透镜均为球面透镜。
  11. 根据权利要求1～8中任一项所述的光学镜头，其特征在于，
    所述第一透镜组包括曲面棱镜，所述曲面棱镜包括入射面、出射面以及反射面，所述反射面与所述出射面之间的夹角为锐角，所述入射面连接于所述反射面和所述出射面之间，且所述入射面为凸面，和/或，所述入射面为非球面。
  12. 根据权利要求11所述的光学镜头，其特征在于，
    所述棱镜为玻璃棱镜，所述第一透镜组还包括设置于所述出射面的像侧的至少一个透镜，所述至少一个透镜中，最靠近所述棱镜的透镜为球面透镜。
  13. 一种摄像头模组，其特征在于，包括感光元件以及权利要求1～12中任一项所述的光学镜头，所述感光元件设置于所述光学镜头的像侧。
  14. 一种电子设备，其特征在于，包括壳体以及权利要求13中所述的摄像头模组，所述摄像头模组安装于所述壳体上。
  15. 一种光学镜头，所述光学镜头用于摄像头模组，其特征在于，包括沿物侧到像侧排列的第一透镜组、第二透镜组以及第三透镜组，所述光学镜头共包括三个透镜组；
    所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度，所述第三透镜组具有正光焦度；
    所述第一透镜组由沿物侧到像侧依次排列的具有正光焦度的曲面棱镜、具有负光焦度的透镜二L2、光阑、具有正光焦度的透镜三L3组成；
    所述第二透镜组共包括两个透镜，两个透镜胶合在一起；
    所述第三透镜组共包括四个透镜，沿物侧到像侧依次为具有正光焦度的透镜五L5、具有负光焦度的透镜六L6、具有正光焦度的透镜七L7、具有负光焦度的透镜八L8；
    所述曲面棱镜包括入射面、出射面以及反射面，所述反射面与所述出射面之间的夹角为锐角，所述入射面连接于所述反射面和所述出射面之间，且所述入射面为凸面，所述入射面为非球面；
    所述第二透镜组沿垂直于光轴的方向相对所述第一透镜组移动；
    其中，所述第一透镜组的有效焦距fg1与所述光学镜头的有效焦距f满足：1.36＜fg1/f<5.6；
    第二透镜组的有效焦距fg2与所述光学镜头的有效焦距f满足：-2.73<fg2/f<-0.58；
    光学镜头的光学总长TTL与所述光学镜头的有效焦距f满足：1.61<TTL/f<1.71；
    所述透镜七L7和所述透镜八L8的有效焦距之和fˊ和第二透镜组的有效焦距fg2满足：0.86<fg2/fˊ<8.25。
  16. 根据权利要求15所述的光学镜头，其特征在于，
    所述光学镜头的入瞳直径EPD与所述光学镜头的有效焦距f满足：2.00<f/EPD<2.01。
  17. 根据权利要求15所述的光学镜头，其特征在于，
    所述第一透镜组、所述第二透镜组在光轴上的间距AT12与所述第二透镜组、所述第三透镜组在光轴上的间距AT23满足：0.21<AT12/AT23<0.69。
  18. 根据权利要求15所述的光学镜头，其特征在于，
    所述透镜六L6的物侧面与像侧面的曲率半径之和R2与所述透镜七L7的物侧面与像侧面的曲率半径之和R3满足：-1.21<R2/R3<-0.78。
  19. 根据权利要求15所述的光学镜头，其特征在于，
    所述第二透镜组包括的所述两个透镜均为球面透镜。
  20. 根据权利要求15所述的光学镜头，其特征在于，
    所述曲面棱镜为玻璃棱镜。
  21. 一种摄像头模组，其特征在于，包括感光元件以及权利要求15～20中任一项所述的光学镜头，所述感光元件设置于所述光学镜头的像侧。
  22. 一种电子设备，其特征在于，包括壳体以及权利要求21中所述的摄像头模组，所述摄像头模组安装于所述壳体上。
PCT/CN2023/116326 2022-11-10 2023-08-31 一种光学镜头、摄像头模组及电子设备 WO2024098911A1 (zh)

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