WO2024125017A1 - 光学镜头 - Google Patents

光学镜头 Download PDF

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Publication number
WO2024125017A1
WO2024125017A1 PCT/CN2023/119754 CN2023119754W WO2024125017A1 WO 2024125017 A1 WO2024125017 A1 WO 2024125017A1 CN 2023119754 W CN2023119754 W CN 2023119754W WO 2024125017 A1 WO2024125017 A1 WO 2024125017A1
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WIPO (PCT)
Prior art keywords
lens
optical lens
optical
image
object side
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Application number
PCT/CN2023/119754
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English (en)
French (fr)
Inventor
徐宇轩
王克民
Original Assignee
江西联创电子有限公司
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Publication of WO2024125017A1 publication Critical patent/WO2024125017A1/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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Definitions

  • the present application relates to the technical field of optical lenses, and in particular to an optical lens.
  • the vehicle's assisted driving system has gradually improved.
  • the imaging quality of the on-board lens directly affects the performance of the assisted driving system.
  • the vehicle lens In order to accurately obtain external information, the vehicle lens needs to be equipped with a larger chip with higher resolution. Therefore, the vehicle lens needs to have a higher resolution. In addition, for safety reasons, the vehicle lens also needs to have high stability to adapt to various harsh environments and avoid problems such as reduced imaging performance of the vehicle lens when used in different environments.
  • the purpose of the present application is to provide an optical lens having the advantages of a large field of view and a large image surface.
  • An optical lens comprising seven lenses, characterized in that the following are arranged in order from the object side to the imaging surface along the optical axis:
  • the first lens has a negative optical power, and its object side surface is convex and its image side surface is concave;
  • a second lens having negative optical power whose object side surface is convex and whose image side surface is concave;
  • a third lens having optical power and having a concave object side surface
  • a fourth lens element having positive refractive power and a convex image-side surface
  • a fifth lens having positive refractive power whose object-side surface and image-side surface are both convex;
  • the sixth lens element has negative optical power, and both the object side surface and the image side surface are concave;
  • the seventh lens has positive refractive power, and both the object side surface and the image side surface are convex;
  • the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field angle satisfy the following: 4.0 ⁇ IH/f ⁇ 5.5.
  • the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field angle satisfy: TTL/IH ⁇ 4.7.
  • the entrance pupil diameter EPD of the optical lens and the real image height IH corresponding to the maximum field angle satisfy: 7.0 ⁇ IH/EPD ⁇ 11.0.
  • the real image height IH corresponding to the maximum field angle of the optical lens and the real image height IH h corresponding to the maximum half field angle of the optical lens satisfy: 0.35 ⁇ IH h /IH ⁇ 0.45.
  • the effective focal length f, the maximum field angle ⁇ and the real image height IH corresponding to the maximum field angle of the optical lens satisfy: 1.2 ⁇ (IH/2)/(f ⁇ ( ⁇ /2)) ⁇ 1.6.
  • the maximum field of view FOV of the optical lens and the incident angle CRA of the principal ray of the maximum field of view on the image plane satisfy: 4.0 ⁇ (FOV/2)/CRA ⁇ 6.0.
  • the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -14.0 ⁇ f1 /f ⁇ -7.0.
  • the effective focal length f of the optical lens and the first lens object side curvature radius R1 and image side curvature radius R2 respectively satisfy: 10.0 ⁇ R 1 /f, R 2 /f ⁇ 6.0.
  • the sag height Sag 3 and the clear semi-aperture d 3 of the object side of the second lens and the sag height Sag 4 and the clear semi-aperture d 4 of the image side of the second lens satisfy: 0.2 ⁇ (Sag 3 /d 3 )/(Sag 4 /d 4 ) ⁇ 0.4.
  • the total optical length TTL of the optical lens and the sum ⁇ CT of the center thicknesses of the first lens to the sixth lens along the optical axis respectively satisfy: 0.4 ⁇ CT/TTL ⁇ 0.7.
  • the beneficial effect of the present application is that by reasonably matching the lens shapes and optical focal lengths of the lenses, the advantages of both a large field of view and a large image surface are achieved.
  • FIG. 1 is a schematic diagram of the structure of an optical lens according to Example 1 of the present application.
  • FIG. 2 is a graph showing a field curvature curve of the optical lens in Example 1 of the present application.
  • FIG. 3 is a graph showing the F-Theta distortion of the optical lens in Example 1 of the present application.
  • FIG. 4 is a relative illumination curve diagram of the optical lens in Example 1 of the present application.
  • FIG. 5 is a graph showing the MTF curve of the optical lens in Example 1 of the present application.
  • FIG. 6 is a graph showing an axial aberration curve of the optical lens in Example 1 of the present application.
  • FIG. 7 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 1 of the present application.
  • FIG8 is a schematic diagram of the structure of the optical lens of Example 2 of the present application.
  • FIG. 9 is a graph showing a field curvature curve of the optical lens in Example 2 of the present application.
  • FIG. 10 is a graph showing the F-Theta distortion of the optical lens in Example 2 of the present application.
  • FIG. 11 is a relative illumination curve diagram of the optical lens in Example 2 of the present application.
  • FIG. 12 is a graph showing the MTF curve of the optical lens in Example 2 of the present application.
  • FIG. 13 is a graph showing an axial aberration curve of the optical lens in Example 2 of the present application.
  • FIG. 14 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 2 of the present application.
  • FIG. 15 is a schematic diagram of the structure of the optical lens of Example 3 of the present application.
  • FIG. 16 is a graph showing the field curvature of the optical lens in Example 3 of the present application.
  • FIG. 17 is a graph showing the F-Theta distortion of the optical lens in Example 3 of the present application.
  • FIG. 18 is a relative illumination curve diagram of the optical lens in Example 3 of the present application.
  • FIG. 19 is a graph showing the MTF curve of the optical lens in Example 3 of the present application.
  • FIG. 20 is a graph showing an axial aberration curve of the optical lens in Example 3 of the present application.
  • FIG. 21 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 3 of the present application.
  • Figure 22 is a schematic diagram of the structure of the optical lens of Example 4 of the present application.
  • FIG. 23 is a graph showing the field curvature of the optical lens in Example 4 of the present application.
  • FIG. 24 is a graph showing the F-Theta distortion of the optical lens in Example 4 of the present application.
  • Figure 25 is a relative illumination curve of the optical lens in Example 4 of the present application.
  • Figure 26 is an MTF curve diagram of the optical lens in Example 4 of the present application.
  • FIG. 27 is a graph showing an axial aberration curve of the optical lens in Example 4 of the present application.
  • FIG. 28 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 4 of the present application.
  • Figure 29 is a schematic diagram of the structure of the optical lens of Example 5 of the present application.
  • Figure 30 is a field curvature curve diagram of the optical lens in Example 5 of the present application.
  • FIG31 is a graph showing the F-Theta distortion of the optical lens in Example 5 of the present application.
  • Figure 32 is a relative illumination curve of the optical lens in Example 5 of the present application.
  • Figure 33 is an MTF curve diagram of the optical lens in Example 5 of the present application.
  • Figure 34 is an axial aberration curve diagram of the optical lens in Example 5 of the present application.
  • Figure 35 is a vertical axis chromatic aberration curve of the optical lens in Example 5 of the present application.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.
  • the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation.
  • the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings.
  • the drawings are only examples and are not drawn strictly to scale.
  • the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region.
  • the surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.
  • the optical lens according to the embodiment of the present application includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a filter and a protective glass.
  • the first lens may have a negative optical power, which is beneficial to reduce the inclination angle of the incident light, thereby effectively sharing the large field of view on the object side.
  • the object side of the first lens is convex, and the image side is concave, which is beneficial to obtain a larger field of view angle range.
  • the lens will be in bad weather such as rain and snow. Setting the first lens to a meniscus shape with the convex surface facing the object side can facilitate the sliding of water droplets and reduce the impact on the imaging of the lens.
  • the first lens may have an aspherical mirror surface, which is beneficial for the edge area of the optical lens to have a large angle resolution and can improve the resolution of the edge field of view area.
  • the second lens may have a negative focal length, which can share the negative focal length of the front end of the optical lens, thereby helping to avoid excessive light deflection caused by excessive concentration of the focal length of the first lens, and reducing the difficulty of correcting chromatic aberration of the optical lens.
  • the object side of the second lens is convex, and the image side is concave, which is conducive to improving the ability to collect light from the edge field of view while reducing the working aperture of the second lens, thereby facilitating the miniaturization of the volume of the rear end of the optical lens; in addition, it can effectively avoid vertical axis chromatic aberration caused by excessive deflection angle of light from the edge field of view during the process of light transmission from the first lens to the second lens, reducing the difficulty of correcting chromatic aberration of the optical lens.
  • the object side of the third lens is concave, which is conducive to gathering edge light, effectively transmitting more light beams to the back-end optical system, and improving the imaging quality of the optical lens.
  • the fourth lens may have positive focal length, which is beneficial to reduce the angle of light deflection and allow the light to transition smoothly.
  • the image side of the fourth lens is convex, which can reduce the energy of the ghost image generated by reflection in the central area projected on the image surface and improve the imaging quality of the optical lens.
  • the fifth lens may have positive focal length, which is beneficial to improving the ability to converge light in the edge field of view, while effectively controlling the total optical length to reduce the volume of the optical lens, thereby facilitating the miniaturization of the optical lens.
  • the object side and image side of the fifth lens are both convex, which is beneficial to the smooth transition of light and balances the spherical aberration and coma generated by the fifth lens itself, thereby improving the imaging quality of the optical lens.
  • the sixth lens may have a negative optical power, which is beneficial to increase the imaging area of the optical lens and improve the imaging quality of the optical lens.
  • the object side and image side of the sixth lens are both concave, which is beneficial to balance the astigmatism generated by the sixth lens itself and improve the imaging quality of the optical lens.
  • the seventh lens may have a positive optical power, which is beneficial to suppress the angle of the edge field of view incident on the imaging surface, effectively transmit more light beams to the imaging surface, and improve the imaging quality of the optical lens.
  • the object side and image side of the seventh lens are both convex, which is beneficial to improve the relative illumination of the edge field of view to avoid the generation of dark corners and improve the imaging quality of the optical lens.
  • the fifth lens and the sixth lens can be glued to form a glued lens, which can effectively correct the chromatic aberration of the optical lens, reduce the eccentricity sensitivity of the optical lens, balance the aberration of the optical lens, and improve the imaging quality of the optical lens; it can also reduce the assembly sensitivity of the optical lens, thereby reducing the difficulty of the processing technology of the optical lens and improving the assembly yield of the optical lens.
  • an aperture for limiting the light beam may be provided between the third lens and the fourth lens or between the fourth lens and the fifth lens.
  • the aperture may be provided near the object side of the fourth lens or the fifth lens, which can reduce the generation of ghost images of the optical lens and is beneficial for focusing the light entering the optical lens and reducing the rear port diameter of the optical lens.
  • the aperture value FNO of the optical lens satisfies: FNO ⁇ 2.10. Meeting the above range can make the optical lens have a sufficiently large depth of field, which satisfies the optical lens to clearly obtain long-distance information.
  • the maximum field of view FOV of the optical lens satisfies: 190° ⁇ FOV. Meeting the above range is conducive to achieving ultra-wide-angle characteristics, thereby being able to obtain more scene information and meeting the needs of large-range detection of the optical lens.
  • the incident angle CRA of the principal ray of the maximum field angle of the optical lens on the image plane satisfies: 18° ⁇ CRA ⁇ 23°. Meeting the above range can make the CRA of the optical lens and the CRA of the chip photosensitive element have a larger allowable error range, thereby improving the adaptability of the optical lens to the image sensor.
  • the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: TTL/IH ⁇ 4.7. Meeting the above range is conducive to the optical lens to achieve a balance between good imaging quality and miniaturization design, and can meet the requirements for the optical lens under different working conditions.
  • the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field angle satisfy: 4.0 ⁇ IH/f ⁇ 5.5. Meeting the above range can not only achieve ultra-wide-angle characteristics, thereby meeting the needs of wide-range shooting, but also achieve large image plane characteristics, thereby improving the imaging quality of the optical lens.
  • the optical back focus BFL of the optical lens and the effective focal length f satisfy: 1.3 ⁇ BFL/f. Meeting the above range is conducive to achieving a balance between obtaining good imaging quality and easy assembly of the optical back focal length, ensuring the imaging quality of the optical lens while reducing the difficulty of the camera module assembly process.
  • the maximum field of view FOV and the effective focal length f of the optical lens satisfy: 110°/mm ⁇ FOV/f ⁇ 150°/mm. Meeting the above range can reduce the deflection angle of the outgoing light while obtaining a larger field of view, reduce the sensitivity of the optical lens and the difficulty of correcting various aberrations, thereby improving the imaging quality of the optical lens.
  • the entrance pupil diameter EPD of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 7.0 ⁇ IH/EPD ⁇ 11.0. Meeting the above range can increase the width of the light beam incident on the optical lens, thereby improving the brightness of the optical lens at the image plane to avoid the generation of dark corners, and at the same time can increase the imaging area of the optical lens.
  • the real image height IH corresponding to the maximum field of view of the optical lens and the real image height IH h corresponding to the maximum half field of view satisfy: 0.35 ⁇ IH h /IH ⁇ 0.45.
  • Meeting the above range can increase the proportion of the edge field of view imaging range in the entire imaging range. The larger the imaging range, the more pixels the corresponding chip surface occupies, so that more edge field of view detail information can be obtained.
  • the effective focal length f, the maximum field angle ⁇ , and the real image height IH corresponding to the maximum field angle of the optical lens satisfy the following conditions: 1.2 ⁇ (IH/2)/(f ⁇ ( ⁇ /2)) ⁇ 1.6. Meeting the above range is conducive to controlling the smooth change of edge distortion of the optical lens and facilitating restoration through software algorithms in the later stage.
  • the maximum field of view FOV of the optical lens and the incident angle CRA of the principal ray of the maximum field of view on the image plane satisfy: 4.0 ⁇ (FOV/2)/CRA ⁇ 6.0. Meeting the above range can enable the optical lens to achieve a large field of view while allowing the incident light to be incident on the image sensor at a suitable angle, thereby improving the photosensitivity of the image sensor and the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -14.0 ⁇ f1 /f ⁇ -7.0. Meeting the above range can make the first lens have an appropriate negative focal length, which is beneficial to reduce the inclination angle of the incident light, thereby effectively sharing the large field of view of the object side, and at the same time, a larger field of view angle range can be obtained.
  • the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -4.0 ⁇ f2 /f ⁇ -3.0. Meeting the above range can make the second lens have appropriate negative focal power, which can share the negative focal power of the front end of the optical lens, thereby facilitating the avoidance of excessive light deflection caused by excessive concentration of the focal length of the first lens, and reducing the difficulty of chromatic aberration correction of the optical lens.
  • the effective focal length f of the optical lens and the focal length f3 of the third lens satisfy: 5.0 ⁇
  • the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: 2.0 ⁇ f4 /f ⁇ 9.0. Meeting the above range can make the fourth lens have an appropriate positive focal power, which is conducive to converging light while reducing the light deflection angle, making the light transition smoothly, and improving the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: 1.5 ⁇ f5 /f ⁇ 3.5.
  • the fifth lens can have an appropriate positive focal power, which is beneficial to improving the light convergence capability of the edge field of view, while effectively controlling the total optical length and reducing the volume of the optical lens, which is beneficial to the miniaturization of the optical lens.
  • the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy: -2.0 ⁇ f6 /f ⁇ -1.0. If the above range is met, the sixth lens can have an appropriate negative focal length, which is beneficial to increase the imaging area of the optical lens and improve the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: 2.0 ⁇ f7 /f ⁇ 3.8.
  • the seventh lens can have an appropriate positive focal power, which is beneficial to suppress the angle of the edge field of view incident on the imaging surface, effectively transmit more light beams to the imaging surface, and improve the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the combined focal length f56 of the fifth lens and the sixth lens satisfy: -50.0 ⁇ f56 /f ⁇ -3.0. If the above range is satisfied, the cemented lens formed by the fifth lens and the sixth lens may have an appropriate negative focal length, which is beneficial to balancing the chromatic aberration of the optical lens and improving the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the first lens object side curvature radius R1 and image side curvature radius R2 respectively satisfy: 10.0 ⁇ R1 /f, R2 /f ⁇ 6.0. Meeting the above range is conducive to achieving ultra-wide-angle characteristics, thereby being able to obtain more scene information and meeting the needs of optical lens for wide-range detection.
  • the sag height Sag 3 and the semi-aperture d 3 of the object side of the second lens and the sag height Sag 4 and the semi-aperture d 4 of the image side of the second lens satisfy: 0.2 ⁇ (Sag 3 /d 3 )/(Sag 4 /d 4 ) ⁇ 0.4. Meeting the above range is conducive to compressing the central field of view of the optical lens, so that the imaging quality of the edge field of view is better.
  • the total optical length TTL of the optical lens and the sum of the center thicknesses of the first lens to the sixth lens along the optical axis ⁇ CT satisfy: 0.4 ⁇ CT/TTL ⁇ 0.7. Meeting the above range can effectively reduce the total length of the optical lens, and is beneficial to the structural design and production process of the optical lens.
  • z is the distance between the surface and the vertex of the surface in the direction of the optical axis
  • h is the distance from the optical axis to the surface
  • c is the curvature of the surface vertex
  • K is the quadratic surface coefficient
  • A, B, C, D, E, and F are the second-order, fourth-order, sixth-order, eighth-order, tenth-order, and twelfth-order surface coefficients respectively.
  • the present application is further described below in multiple embodiments.
  • the thickness, radius of curvature, and material selection of each lens in the optical lens are different.
  • the following embodiments are only preferred embodiments of the present application, but the embodiments of the present application are not limited to the following embodiments. Any other changes, substitutions, combinations, or simplifications that do not deviate from the innovative points of the present application should be regarded as equivalent replacement methods and are included in the protection scope of the present application.
  • FIG. 1 is a schematic diagram of the structure of the optical lens provided in Example 1 of the present application.
  • the optical lens includes, from the object side to the imaging surface along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.
  • the first lens L1 has negative refractive power, its object side surface S1 is convex, and its image side surface S2 is concave;
  • the second lens L2 has negative refractive power, its object side surface S3 is convex, and its image side surface S4 is concave;
  • the third lens L3 has negative refractive power, its object-side surface S5 is concave, and its image-side surface S6 is convex;
  • the fourth lens L4 has positive refractive power, and its object-side surface S7 and image-side surface S8 are both convex surfaces;
  • the fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both concave surfaces;
  • the seventh lens L7 has positive refractive power, and its object-side surface S13 and image-side surface S14 are both convex surfaces;
  • the filter G1 whose object side surface S15 and image side surface S16 are both flat;
  • the protective glass G2 has an object side surface S17 and an image side surface S18 both of which are flat;
  • the imaging surface S19 is a plane
  • the fifth lens L5 and the sixth lens L6 may be cemented together to form a cemented lens.
  • the surface parameters of the aspherical lens of the optical lens in Example 1 are shown in Table 1-2.
  • FIG2 shows a field curvature curve diagram of Example 1. It can be seen from the diagram that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.05 mm, indicating that the optical lens can correct the field curvature very well.
  • FIG3 shows an F-Theta distortion curve of Example 1. It can be seen from the figure that the F-Theta distortion of the optical lens is controlled within 0 to 24%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is conducive to restoration through software algorithms in the later stage.
  • FIG4 shows a relative illumination curve of Example 1. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 50% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG5 shows a modulation transfer function (MTF) curve of Example 1. It can be seen from the figure that the MTF value of this embodiment is above 0.3 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low-frequency and high-frequency conditions.
  • MTF modulation transfer function
  • FIG6 shows an axial aberration curve of Example 1. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 15 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • FIG7 shows a vertical chromatic aberration curve of Example 1. It can be seen from the figure that the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 2 ⁇ m, indicating that the optical lens can extremely well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.
  • FIG 8 is a schematic diagram of the structure of the optical lens provided in Example 2 of the present application.
  • the optical lens includes, along the optical axis from the object side to the imaging surface, a first lens L1, a second lens L2, a third lens L3, an aperture ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.
  • the first lens L1 has negative refractive power, its object side surface S1 is convex, and its image side surface S2 is concave;
  • the second lens L2 has negative refractive power, its object side surface S3 is convex, and its image side surface S4 is concave;
  • the third lens L3 has negative refractive power, and its object-side surface S5 and image-side surface S6 are both concave;
  • the fourth lens L4 has positive refractive power, and its object-side surface S7 and image-side surface S8 are both convex surfaces;
  • the fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both concave surfaces;
  • the seventh lens L7 has positive refractive power, and its object-side surface S13 and image-side surface S14 are both convex surfaces;
  • the filter G1 whose object side surface S15 and image side surface S16 are both flat;
  • the protective glass G2 has an object side surface S17 and an image side surface S18 both of which are flat;
  • the imaging surface S19 is a plane
  • the fifth lens L5 and the sixth lens L6 may be cemented together to form a cemented lens.
  • FIG9 shows a field curvature curve diagram of Example 2. It can be seen from the diagram that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.05 mm, indicating that the optical lens can correct the field curvature very well.
  • FIG10 shows an F-Theta distortion curve of Example 2. It can be seen from the figure that the F-Theta distortion of the optical lens is controlled within 0 to 60% and the edge distortion changes smoothly, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is conducive to restoration through software algorithms in the later stage.
  • FIG11 shows a relative illumination curve of Example 2. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 40% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG12 shows a modulation transfer function (MTF) curve of Example 2. It can be seen from the figure that the MTF value of this embodiment is above 0.3 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low-frequency and high-frequency conditions.
  • MTF modulation transfer function
  • FIG13 shows an axial aberration curve of Example 2. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 15 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • FIG14 shows a vertical chromatic aberration curve of Example 2. It can be seen from the figure that the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 3 ⁇ m, indicating that the optical lens can extremely well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.
  • FIG 15 is a schematic diagram of the structure of the optical lens provided in Example 3 of the present application.
  • the optical lens includes, along the optical axis from the object side to the imaging surface, a first lens L1, a second lens L2, a third lens L3, an aperture ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.
  • the first lens L1 has negative refractive power, its object side surface S1 is convex, and its image side surface S2 is concave;
  • the second lens L2 has negative refractive power, its object side surface S3 is convex, and its image side surface S4 is concave;
  • the third lens L3 has negative refractive power, and its object-side surface S5 and image-side surface S6 are both concave;
  • the fourth lens L4 has positive refractive power, and its object-side surface S7 and image-side surface S8 are both convex surfaces;
  • the fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both concave surfaces;
  • the seventh lens L7 has positive refractive power, and its object-side surface S13 and image-side surface S14 are both convex surfaces;
  • the filter G1 whose object side surface S15 and image side surface S16 are both flat;
  • the protective glass G2 has an object side surface S17 and an image side surface S18 both of which are flat;
  • the imaging surface S19 is a plane
  • the fifth lens L5 and the sixth lens L6 may be cemented together to form a cemented lens.
  • FIG16 shows a field curvature curve diagram of Example 3. It can be seen from the diagram that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.05 mm, indicating that the optical lens can correct the field curvature very well.
  • FIG17 shows the F-Theta distortion curve of Example 3. It can be seen from the figure that the F-Theta distortion of the optical lens is controlled within 0 to 60% and the edge distortion changes smoothly, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is conducive to restoration through software algorithms in the later stage.
  • FIG18 shows a relative illumination curve of Example 3. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 40% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG19 shows a modulation transfer function (MTF) curve of Example 3. It can be seen from the figure that the MTF value of this embodiment is above 0.3 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low-frequency and high-frequency conditions.
  • MTF modulation transfer function
  • FIG20 shows an axial aberration curve of Example 3. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 15 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • FIG21 shows a vertical chromatic aberration curve of Example 3. It can be seen from the figure that the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 3 ⁇ m, indicating that the optical lens can extremely well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.
  • FIG 22 is a schematic diagram of the structure of the optical lens provided in Example 4 of the present application.
  • the optical lens includes, along the optical axis from the object side to the imaging surface, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.
  • the first lens L1 has negative refractive power, its object side surface S1 is convex, and its image side surface S2 is concave;
  • the second lens L2 has negative refractive power, its object side surface S3 is convex, and its image side surface S4 is concave;
  • the third lens L3 has positive refractive power, its object-side surface S5 is concave, and its image-side surface S6 is convex;
  • the fourth lens L4 has positive refractive power, its object-side surface S7 is concave, and its image-side surface S8 is convex;
  • the fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both concave surfaces;
  • the seventh lens L7 has positive refractive power, and its object-side surface S13 and image-side surface S14 are both convex surfaces;
  • the filter G1 whose object side surface S15 and image side surface S16 are both flat;
  • the protective glass G2 has an object side surface S17 and an image side surface S18 both of which are flat;
  • the imaging surface S19 is a plane
  • the fifth lens L5 and the sixth lens L6 may be cemented together to form a cemented lens.
  • FIG23 shows the field curvature curve of Example 4. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.05 mm, indicating that the optical lens can correct the field curvature very well.
  • FIG24 shows the F-Theta distortion curve of Example 4. It can be seen from the figure that the F-Theta distortion of the optical lens is controlled within 0 to 30%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is conducive to restoration through software algorithms in the later stage.
  • FIG25 shows a relative illumination curve of Example 4. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 40% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG26 shows a modulation transfer function (MTF) curve of Example 4. It can be seen from the figure that the MTF value of this embodiment is above 0.4 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low-frequency and high-frequency conditions.
  • MTF modulation transfer function
  • FIG27 shows the axial aberration curve of Example 4. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 10 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • FIG28 shows a vertical chromatic aberration curve of Example 4. It can be seen from the figure that the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 2 ⁇ m, indicating that the optical lens can extremely well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.
  • FIG 29 is a schematic diagram of the structure of the optical lens provided in Example 5 of the present application.
  • the optical lens includes, along the optical axis from the object side to the imaging surface, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.
  • the first lens L1 has negative refractive power, its object side surface S1 is convex, and its image side surface S2 is concave;
  • the second lens L2 has negative refractive power, its object side surface S3 is convex, and its image side surface S4 is concave;
  • the third lens L3 has positive refractive power, its object-side surface S5 is concave, and its image-side surface S6 is convex;
  • the fourth lens L4 has positive refractive power, and its object-side surface S7h and image-side surface S8 are both convex surfaces;
  • the fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both concave surfaces;
  • the seventh lens L7 has positive refractive power, and its object-side surface S13 and image-side surface S14 are both convex surfaces;
  • the filter G1 whose object side surface S15 and image side surface S16 are both flat;
  • the protective glass G2 has an object side surface S17 and an image side surface S18 both of which are flat;
  • the imaging surface S19 is a plane
  • the fifth lens L5 and the sixth lens L6 may be cemented together to form a cemented lens.
  • FIG30 shows the field curvature curve of Example 5. It can be seen from the figure that the field curvature of the meridian image plane and the sagittal image plane is controlled within ⁇ 0.1 mm, indicating that the optical lens can correct the field curvature well.
  • FIG31 shows the F-Theta distortion curve of Example 5. It can be seen from the figure that the F-Theta distortion of the optical lens is controlled within 0 to 24%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is conducive to restoration through software algorithms in the later stage.
  • FIG32 shows a relative illumination curve of Example 5. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 40% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG33 shows a modulation transfer function (MTF) curve of Example 5. It can be seen from the figure that the MTF value of this embodiment is above 0.4 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capabilities in both low-frequency and high-frequency conditions.
  • MTF modulation transfer function
  • FIG34 shows the axial aberration curve of Example 5. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 10 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • FIG35 shows a vertical chromatic aberration curve of Example 5. It can be seen from the figure that the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 2 ⁇ m, indicating that the optical lens can extremely well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.
  • Table 6 shows the optical characteristics corresponding to the above embodiments, including the effective focal length f, the total optical length TTL, the aperture number FNO, the real image height IH, the field of view FOV of the optical lens, and the numerical value corresponding to each conditional expression in the above embodiments.
  • the optical lens of the embodiment of the present application achieves the advantages of both a large field of view and a large image surface by reasonably matching the lens shapes and optical focal lengths of the lenses.

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Abstract

一种光学镜头，共七片透镜，沿光轴从物侧到成像面依次为：具有负光焦度的第一透镜（L1），其物侧面（S1）为凸面，像侧面（S2）为凹面；具有负光焦度的第二透镜（L2），其物侧面（S3）为凸面，像侧面（S4）为凹面；具有光焦度的第三透镜（L3），其物侧面（S5）为凹面；具有正光焦度的第四透镜（L4），其像侧面（S8）为凸面；具有正光焦度的第五透镜（L5），其物侧面（S9）和像侧面（S10）均为凸面；具有负光焦度的第六透镜（L6），其物侧面（S11）和像侧面（S12）均为凹面；具有正光焦度的第七透镜（L7），其物侧面（S13）和像侧面（S14）均为凸面；光学镜头的有效焦距f与最大视场角所对应的真实像高IH满足：4.0＜IH/f＜5.5。

Description

光学镜头
相关申请的交叉引用
本申请要求于2022年12月13日提交的申请号为2022116011617的中国申请的优先权，其在此处于所有目的通过引用将其全部内容并入本文。
技术领域
本申请涉及光学镜头技术领域，特别是涉及一种光学镜头。
背景技术
随着汽车智能化发展，车辆的辅助驾驶系统逐渐完善，车载镜头作为辅助驾驶系统获取外界信息的主要工具之一，其成像品质直接影响着辅助驾驶系统性能的优劣。
为了精准地获取外界信息，车载镜头需要搭配尺寸较大且分辨率较高的芯片，因此，车载镜头需要具有较高的解像能力。此外，出于安全性考虑，车载镜头还需要具有较高的稳定性，以适应各种恶劣的环境，避免在不同环境下使用时造成车载镜头成像性能降低等问题。
申请内容
针对上述问题，本申请的目的在于提出一种光学镜头，其具备大视场和大像面的优点。
为实现上述目的，本申请的技术方案如下：
一种光学镜头，共七片透镜，其特征在于，沿光轴从物侧到成像面依次为：
具有负光焦度的第一透镜，其物侧面为凸面，像侧面为凹面；
具有负光焦度的第二透镜，其物侧面为凸面，像侧面为凹面；
具有光焦度的第三透镜，其物侧面为凹面；
具有正光焦度的第四透镜，其像侧面为凸面；
具有正光焦度的第五透镜，其物侧面和像侧面均为凸面；
具有负光焦度的第六透镜，其物侧面和像侧面均为凹面；
具有正光焦度的第七透镜，其物侧面和像侧面均为凸面；
所述光学镜头的有效焦距f与最大视场角所对应的真实像高IH满足：4.0＜IH/f＜5.5。
较佳地，所述光学镜头的光学总长TTL与最大视场角所对应的真实像高IH满足：TTL/IH＜4.7。
较佳地，所述光学镜头的入瞳直径EPD与最大视场角所对应的真实像高IH满足：7.0＜IH/EPD＜11.0。
较佳地，所述光学镜头最大视场角所对应的真实像高IH与最大半视场角所对应的真实像高IHh满足：0.35＜IHh/IH＜0.45。
较佳地，所述光学镜头的有效焦距f、最大视场角θ和最大视场角所对应的真实像高IH满足：1.2＜(IH/2)/(f×(θ/2))＜1.6。
较佳地，所述光学镜头的最大视场角FOV与最大视场角主光线在像面上的入射角CRA满足：4.0＜(FOV/2)/CRA＜6.0。
较佳地，所述光学镜头的有效焦距f与所述第一透镜的焦距f1满足：-14.0＜f1/f＜-7.0。
较佳地，所述光学镜头的有效焦距f与所述第一透镜物侧面曲率半径R1和像侧面曲率半径R2分别满足：10.0＜R1/f，R2/f＜6.0。
较佳地，所述第二透镜物侧面的矢高Sag3和通光半口径d3与所述第二透镜像侧面的矢高Sag4和通光半口径d4满足：0.2＜(Sag3/d3)/(Sag4/d4)＜0.4。
较佳地，所述光学镜头的光学总长TTL与所述第一透镜至所述第六透镜分别沿光轴的中心厚度的总和∑CT满足：0.4＜∑CT/TTL＜0.7。
相较于现有技术，本申请的有益效果是：通过合理的搭配各透镜之间的镜片形状与光焦度组合，实现了同时具备大视场和大像面的优点。
本申请的附加方面与优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本申请实施例1的光学镜头的结构示意图。
图2为本申请实施例1中光学镜头的场曲曲线图。
图3为本申请实施例1中光学镜头的F-Theta畸变曲线图。
图4为本申请实施例1中光学镜头的相对照度曲线图。
图5为本申请实施例1中光学镜头的MTF曲线图。
图6为本申请实施例1中光学镜头的轴向像差曲线图。
图7为本申请实施例1中光学镜头的垂轴色差曲线图。
图8为本申请实施例2的光学镜头的结构示意图。
图9为本申请实施例2中光学镜头的场曲曲线图。
图10为本申请实施例2中光学镜头的F-Theta畸变曲线图。
图11为本申请实施例2中光学镜头的相对照度曲线图。
图12为本申请实施例2中光学镜头的MTF曲线图。
图13为本申请实施例2中光学镜头的轴向像差曲线图。
图14为本申请实施例2中光学镜头的垂轴色差曲线图。
图15为本申请实施例3的光学镜头的结构示意图。
图16为本申请实施例3中光学镜头的场曲曲线图。
图17为本申请实施例3中光学镜头的F-Theta畸变曲线图。
图18为本申请实施例3中光学镜头的相对照度曲线图。
图19为本申请实施例3中光学镜头的MTF曲线图。
图20为本申请实施例3中光学镜头的轴向像差曲线图。
图21为本申请实施例3中光学镜头的垂轴色差曲线图。
图22为本申请实施例4的光学镜头的结构示意图。
图23为本申请实施例4中光学镜头的场曲曲线图。
图24为本申请实施例4中光学镜头的F-Theta畸变曲线图。
图25为本申请实施例4中光学镜头的相对照度曲线图。
图26为本申请实施例4中光学镜头的MTF曲线图。
图27为本申请实施例4中光学镜头的轴向像差曲线图。
图28为本申请实施例4中光学镜头的垂轴色差曲线图。
图29为本申请实施例5的光学镜头的结构示意图。
图30为本申请实施例5中光学镜头的场曲曲线图。
图31为本申请实施例5中光学镜头的F-Theta畸变曲线图。
图32为本申请实施例5中光学镜头的相对照度曲线图。
图33为本申请实施例5中光学镜头的MTF曲线图。
图34为本申请实施例5中光学镜头的轴向像差曲线图。
图35为本申请实施例5中光学镜头的垂轴色差曲线图。
具体实施方式
为了更好地理解本申请，将参考附图对本申请的各个方面做出更详细的说明。应理解，这些详细说明只是对本申请的实施例的描述，而非以任何方式限制本申请的范围。在说明书全文中，相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意，在本说明书中，第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
在附图中，为了便于说明，已稍微夸大了透镜的厚度、尺寸和形状。具体来讲，附图中所示的球面或非球面的形状通过示例的方式示出。即，球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
在本文中，近轴区域是指光轴附近的区域。若透镜表面为凸面且未界定该凸面位置时，则表示该透镜表面至少于近轴区域为凸面；若透镜表面为凹面且未界定该凹面位置时，则表示该透镜表面至少于近轴区域为凹面。每个透镜最靠近被摄物体的表面称为该透镜的物侧面，每个透镜最靠近成像面的表面称为该透镜的像侧面。
还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、元件和/或部件，但不排除存在或附加有一个或多个其它特征、元件、部件和/或它们的组合。此外，当诸如“...中的至少一个”的表述出现在所列特征的列表之后时，修饰整个所列特征，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可”表示
“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参 考附图并结合实施例来详细说明本申请。
根据本申请实施例的光学镜头从物侧到像侧依次包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜以及滤光片和保护玻璃。
在一些实施例中，第一透镜可具有负光焦度，有利于减小入射光线的倾角，从而对物方大视场实现有效分担。第一透镜物侧面为凸面，像侧面为凹面，有利于获得更大的视场角范围。另外，在实际应用中，考虑到车载应用类镜头室外安装使用环境，镜头会处于雨雪等恶劣天气中，将第一透镜设置为凸面朝向物侧的弯月形状，可有利于水滴等的滑落，可减少对镜头成像的影响。第一透镜可具有非球面镜面，有利于光学镜头边缘区域具备大角度分辨率，能够提升边缘视场区域解像力。
在一些实施例中，第二透镜可具有负光焦度，能够分担光学镜头前端的负光焦度，从而有利于避免因第一透镜光焦度过于集中而造成的光线偏折过大，降低了光学镜头色差矫正的难度。第二透镜物侧面为凸面，像侧面为凹面，有利于提高边缘视场光线收集能力的同时降低第二透镜的工作口径，从而有利于光学镜头后端体积的小型化；另外能够有效避免光线从第一透镜传递至第二透镜的过程中边缘视场光线偏折角过大而导致的垂轴色差，降低了光学镜头色差矫正的难度。
在一些实施例中，第三透镜物侧面为凹面，有利于汇聚边缘光线，将更多的光束有效地传递至后端光学系统，提升光学镜头的成像品质。
在一些实施例中，第四透镜可具有正光焦度，有利于降低光线偏折角度，让光线走势平稳过渡。第四透镜像侧面为凸面，能够降低中心区域由于反射产生的鬼像投影在像面上的能量，提升光学镜头的成像品质。
在一些实施例中，第五透镜可具有正光焦度，有利于提高边缘视场光线汇聚能力，同时有效控制光学总长降低光学镜头体积，进而有利于光学镜头的小型化。第五透镜物侧面和像侧面均为凸面，有利于光线走势平稳过度，并平衡第五透镜自身产生的球差和慧差，提升光学镜头的成像品质。
在一些实施例中，第六透镜可具有负光焦度，有利于增大光学镜头的成像面积，提升光学镜头的成像品质。第六透镜物侧面和像侧面均为凹面，有利于平衡第六透镜自身产生的像散，提升光学镜头的成像品质。
在一些实施例中，第七透镜可具有正光焦度，有利于压制边缘视场入射于成像面的角度，将更多的光束有效地传递至成像面，提升光学镜头的成像品质。第七透镜物侧面和像侧面均为凸面，有利于提升边缘视场的相对照度避免暗角的产生，提升光学镜头的成像品质。
在一些实施例中，第五透镜和第六透镜可胶合组成胶合透镜，可以有效矫正光学镜头的色差、降低光学镜头的偏心敏感度，还可以平衡光学镜头的像差，提高光学镜头的成像品质；还可以降低光学镜头的组装敏感度，进而降低光学镜头的加工工艺难度，提高光学镜头的组装良率。
在一些实施例中，第三透镜和第四透镜或第四透镜和第五透镜之间可设置用于限制光束的光阑，光阑可设置在第四透镜或第五透镜的物侧面的附近处，能够减少光学镜头鬼影的产生，并且有利于收束进入光学镜头的光线，降低光学镜头后端口径。
在一些实施例中，光学镜头的光圈值FNO满足：FNO＜2.10。满足上述范围，可以使得光学镜头具有足够大的景深，满足光学镜头对远距离信息清晰的获取。
在一些实施例中，光学镜头的最大视场角FOV满足：190°≤FOV。满足上述范围，有利于实现超广角特性，从而能够获取更多的场景信息，满足光学镜头大范围探测的需求。
在一些实施例中，光学镜头的最大视场角主光线在像面上的入射角CRA满足：18°＜CRA＜23°。满足上述范围，可以使光学镜头的CRA与芯片感光元件的CRA之间具有较大的容许误差范围，提升光学镜头对于图像传感器的适配能力。
在一些实施例中，光学镜头的光学总长TTL与最大视场角所对应的真实像高IH满足：TTL/IH＜4.7。满足上述范围，有利于光学镜头在取得良好地成像品质与小型化设计中取得平衡，能够满足不同工况下对于光学镜头的要求。
在一些实施例中，光学镜头的有效焦距f与最大视场角所对应的真实像高IH满足：4.0＜IH/f＜5.5。满足上述范围，既能够实现超广角特性，从而满足大范围拍摄需求，也能够实现大像面特性，从而提升光学镜头的成像品质。
在一些实施例中，光学镜头的光学后焦BFL与有效焦距f满足：1.3＜BFL/f。满足上述范围，有利于在取得良好地成像品质与易于装配地光学后焦距长度之间取得平衡，保证光学镜头成像品质的同时，降低摄像头模组装配工艺难度。
在一些实施例中，光学镜头的最大视场角FOV与有效焦距f满足：110°/mm＜FOV/f＜150°/mm。满足上述范围，能够在获得较大的视场角的同时，还能够减小出射光线的偏折角度，降低光学镜头的敏感度和各类像差的矫正难度，从而提升光学镜头的成像品质。
在一些实施例中，光学镜头的入瞳直径EPD与最大视场角所对应的真实像高IH满足：7.0＜IH/EPD ＜11.0。满足上述范围，能够使得射入光学镜头的光线束的宽度变大，使得光学镜头在像面处亮度得到提升避免暗角的产生，同时能够增大光学镜头成像面积。
在一些实施例中，光学镜头最大视场角所对应的真实像高IH与最大半视场角所对应的真实像高IHh满足：0.35＜IHh/IH＜0.45。满足上述范围，可以提高边缘视场成像范围在整个成像范围中的占比，成像范围越大，对应芯片表面占有的像素数就越多，从而可以获得更多的边缘视场细节信息。
在一些实施例中，光学镜头的有效焦距f、最大视场角θ和最大视场角所对应的真实像高IH满足：1.2＜(IH/2)/(f×(θ/2))＜1.6。满足上述范围，有利于控制光学镜头边缘畸变平滑变化，方便后期通过软件算法进行还原。
在一些实施例中，光学镜头的最大视场角FOV与最大视场角主光线在像面上的入射角CRA满足：4.0＜(FOV/2)/CRA＜6.0。满足上述范围，可以使得光学镜头在实现大视场的同时入射光线能够以合适的角度射入到图像传感器上，进而提高图像传感器的感光性能，提高光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第一透镜的焦距f1满足：-14.0＜f1/f＜-7.0。满足上述范围，可以使第一透镜具有适当的负光焦度，有利于减小入射光线的倾角，从而对物方大视场实现有效分担，同时能够获得更大的视场角范围。
在一些实施例中，光学镜头的有效焦距f与第二透镜的焦距f2满足：-4.0＜f2/f＜-3.0。满足上述范围，可以使第二透镜具有适当的负光焦度，能够分担光学镜头前端的负光焦度，从而有利于避免因第一透镜光焦度过于集中而造成的光线偏折过大，降低了光学镜头色差矫正的难度。
在一些实施例中，光学镜头的有效焦距f与第三透镜的焦距f3满足：5.0＜|f3/f|＜15.0。满足上述范围，可以使第三透镜具有适当的光焦度，有利于平衡光学镜头各类相差，提升光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第四透镜的焦距f4满足：2.0＜f4/f＜9.0。满足上述范围，可以使第四透镜具有适当的正光焦度，有利于汇聚光线的同时降低光线偏折角度，让光线走势平稳过渡，提升光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第五透镜的焦距f5满足：1.5＜f5/f＜3.5。满足上述范围，可以使第五透镜具有适当的正光焦度，有利于提高边缘视场光线汇聚能力，同时有效控制光学总长降低光学镜头体积，进而有利于光学镜头的小型化。
在一些实施例中，光学镜头的有效焦距f与第六透镜的焦距f6满足：-2.0＜f6/f＜-1.0。满足上述范围，可以使第六透镜具有适当的负光焦度，有利于增大光学镜头的成像面积，提升光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第七透镜的焦距f7满足：2.0＜f7/f＜3.8。满足上述范围，可以使第七透镜具有适当的正光焦度，有利于压制边缘视场入射于成像面的角度，将更多的光束有效地传递至成像面，提升光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第五透镜和第六透镜的组合焦距f56满足：-50.0＜f56/f＜-3.0。满足上述范围，可以是第五透镜和第六透镜组合成的胶合透镜具有适当的负光焦度，有利于平衡光学镜头的色差，提升光学镜头的成像品质。
在一些实施例中，光学镜头的有效焦距f与第一透镜物侧面曲率半径R1和像侧面曲率半径R2分别满足：10.0＜R1/f，R2/f＜6.0。满足上述范围，有利于实现超广角特性，从而能够获取更多的场景信息，满足光学镜头大范围探测的需求。
在一些实施例中，第二透镜物侧面的矢高Sag3和通光半口径d3与第二透镜像侧面的矢高Sag4和通光半口径d4满足：0.2＜(Sag3/d3)/(Sag4/d4)＜0.4。满足上述范围，有利于压缩光学镜头的中心视场，使得边缘视场的成像质量更好。
在一些实施例中，光学镜头的光学总长TTL与第一透镜至第六透镜分别沿光轴的中心厚度的总和∑CT满足：0.4＜∑CT/TTL＜0.7。满足上述范围，可以有效压缩光学镜头的总长，同时有利于光学镜头的结构设计和生产工艺。
为使系统具有更好的光学性能，镜头中采用多片非球面透镜，所述光学镜头的各非球面表面形状满足下列方程：
其中，z为曲面与曲面顶点在光轴方向的距离，h为光轴到曲面的距离，c为曲面顶点的曲率，K为二次曲面系数，A、B、C、D、E、F分别为二阶、四阶、六阶、八阶、十阶、十二阶曲面系数。
下面分多个实施例对本申请进行进一步的说明。在各个实施例中，光学镜头中的各个透镜的厚度、曲率半径、材料选择部分有所不同，具体不同可参见各实施例的参数表。下述实施例仅为本申请的较佳实施方式，但本申请的实施方式并不仅仅受下述实施例的限制，其他的任何未背离本申请创新点所作的改变、替代、组合或简化，都应视为等效的置换方式，都包含在本申请的保护范围之内。
实施例1
请参阅图1，所示为本申请实施例1中提供的光学镜头的结构示意图，该光学镜头沿光轴从物侧到成像面依次包括：第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、光阑ST、第五透镜L5、第六透镜L6、第七透镜L7以及滤光片G1和保护玻璃G2。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面；
第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面；
第三透镜L3具有负光焦度，其物侧面S5为凹面，像侧面S6为凸面；
第四透镜L4具有正光焦度，其物侧面S7和像侧面S8均为凸面；
光阑ST；
第五透镜L5具有正光焦度，其物侧面S9和像侧面S10均为凸面；
第六透镜L6具有负光焦度，其物侧面S11和像侧面S12均为凹面；
第七透镜L7具有正光焦度，其物侧面S13和像侧面S14均为凸面；
滤光片G1，其物侧面S15和像侧面S16均为平面；
保护玻璃G2，其物侧面S17和像侧面S18均为平面；
成像面S19为平面；
第五透镜L5与第六透镜L6可胶合组成胶合透镜。
实施例1中的光学镜头中各透镜的相关参数如表1-1所示。
表1-1
实施例1中的光学镜头的非球面透镜的面型参数如表1-2所示。
表1-2
图2示出了实施例1的场曲曲线图，从图中可以看出，子午像面和弧矢像面的场曲控制在±0.05mm以内，说明光学镜头能够极好地矫正场曲。
图3示出了实施例1的F-Theta畸变曲线图，从图中可以看出，光学镜头的F-Theta畸变控制在0～24％以内，说明光学镜头的F-Theta畸变得到有效控制，有利于后期通过软件算法进行还原。
图4示出了实施例1的相对照度曲线图，从图中可以看出，在最大半视场角时光学镜头的相对照度值仍大于50％，说明光学镜头具有较好地相对照度。
图5示出了实施例1的调制传递函数(MTF)曲线图，从图中可以看出，本实施例的MTF值在全视场内均在0.3以上，在0～160lp/mm的范围内，从中心至边缘视场的过程中MTF曲线均匀平滑下降，在低频和高频情况下都具有较好地成像品质和较好地细节分辨能力。
图6示出了实施例1的轴向像差曲线图，从图中可以看出，轴向像差的偏移量控制在±15μm以内，说明光学镜头能够良好地矫正轴向像差。
图7示出了实施例1的垂轴色差曲线图，从图中可以看出，最长波长和最短波长的垂轴色差控制在±2μm以内，说明该光学镜头能够极好地矫正边缘视场的色差以及整个像面的二级光谱。
实施例2
请参阅图8，所示为本申请实施例2中提供的光学镜头的结构示意图，该光学镜头沿光轴从物侧到成像面依次包括：第一透镜L1、第二透镜L2、第三透镜L3、光阑ST、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7以及滤光片G1和保护玻璃G2。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面；
第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面；
第三透镜L3具有负光焦度，其物侧面S5和像侧面S6均为凹面；
光阑ST；
第四透镜L4具有正光焦度，其物侧面S7和像侧面S8均为凸面；
第五透镜L5具有正光焦度，其物侧面S9和像侧面S10均为凸面；
第六透镜L6具有负光焦度，其物侧面S11和像侧面S12均为凹面；
第七透镜L7具有正光焦度，其物侧面S13和像侧面S14均为凸面；
滤光片G1，其物侧面S15和像侧面S16均为平面；
保护玻璃G2，其物侧面S17和像侧面S18均为平面；
成像面S19为平面；
第五透镜L5与第六透镜L6可胶合组成胶合透镜。
实施例2中的光学镜头中各透镜的相关参数如表2-1所示。
表2-1
实施例2中的光学镜头的非球面透镜的面型参数如表2-2所示。
表2-2
图9示出了实施例2的场曲曲线图，从图中可以看出，子午像面和弧矢像面的场曲控制在±0.05mm以内，说明光学镜头能够极好地矫正场曲。
图10示出了实施例2的F-Theta畸变曲线图，从图中可以看出，光学镜头的F-Theta畸变控制在0～60％以内且边缘畸变变化平滑，说明光学镜头的F-Theta畸变得到有效控制，有利于后期通过软件算法进行还原。
图11示出了实施例2的相对照度曲线图，从图中可以看出，在最大半视场角时光学镜头的相对照度值仍大于40％，说明光学镜头具有较好地相对照度。
图12示出了实施例2的调制传递函数(MTF)曲线图，从图中可以看出，本实施例的MTF值在全视场内均在0.3以上，在0～160lp/mm的范围内，从中心至边缘视场的过程中MTF曲线均匀平滑下降，在低频和高频情况下都具有较好地成像品质和较好地细节分辨能力。
图13示出了实施例2的轴向像差曲线图，从图中可以看出，轴向像差的偏移量控制在±15μm以内，说明光学镜头能够良好地矫正轴向像差。
图14示出了实施例2的垂轴色差曲线图，从图中可以看出，最长波长和最短波长的垂轴色差控制在±3μm以内，说明该光学镜头能够极好地矫正边缘视场的色差以及整个像面的二级光谱。
实施例3
请参阅图15，所示为本申请实施例3中提供的光学镜头的结构示意图，该光学镜头沿光轴从物侧到成像面依次包括：第一透镜L1、第二透镜L2、第三透镜L3、光阑ST、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7以及滤光片G1和保护玻璃G2。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面；
第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面；
第三透镜L3具有负光焦度，其物侧面S5和像侧面S6均为凹面；
光阑ST；
第四透镜L4具有正光焦度，其物侧面S7和像侧面S8均为凸面；
第五透镜L5具有正光焦度，其物侧面S9和像侧面S10均为凸面；
第六透镜L6具有负光焦度，其物侧面S11和像侧面S12均为凹面；
第七透镜L7具有正光焦度，其物侧面S13和像侧面S14均为凸面；
滤光片G1，其物侧面S15和像侧面S16均为平面；
保护玻璃G2，其物侧面S17和像侧面S18均为平面；
成像面S19为平面；
第五透镜L5与第六透镜L6可胶合组成胶合透镜。
实施例3中的光学镜头中各透镜的相关参数如表3-1所示。
表3-1

实施例3中的光学镜头的非球面透镜的面型参数如表3-2所示。
表3-2
图16示出了实施例3的场曲曲线图，从图中可以看出，子午像面和弧矢像面的场曲控制在±0.05mm以内，说明光学镜头能够极好地矫正场曲。
图17示出了实施例3的F-Theta畸变曲线图，从图中可以看出，光学镜头的F-Theta畸变控制在0～60％以内且边缘畸变变化平滑，说明光学镜头的F-Theta畸变得到有效控制，有利于后期通过软件算法进行还原。
图18示出了实施例3的相对照度曲线图，从图中可以看出，在最大半视场角时光学镜头的相对照度值仍大于40％，说明光学镜头具有较好地相对照度。
图19示出了实施例3的调制传递函数(MTF)曲线图，从图中可以看出，本实施例的MTF值在全视场内均在0.3以上，在0～160lp/mm的范围内，从中心至边缘视场的过程中MTF曲线均匀平滑下降，在低频和高频情况下都具有较好地成像品质和较好地细节分辨能力。
图20示出了实施例3的轴向像差曲线图，从图中可以看出，轴向像差的偏移量控制在±15μm以内，说明光学镜头能够良好地矫正轴向像差。
图21示出了实施例3的垂轴色差曲线图，从图中可以看出，最长波长和最短波长的垂轴色差控制在±3μm以内，说明该光学镜头能够极好地矫正边缘视场的色差以及整个像面的二级光谱。
实施例4
请参阅图22，所示为本申请实施例4中提供的光学镜头的结构示意图，该光学镜头沿光轴从物侧到成像面依次包括：第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、光阑ST、第五透镜L5、第六透镜L6、第七透镜L7以及滤光片G1和保护玻璃G2。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面；
第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面；
第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面；
第四透镜L4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面；
光阑ST；
第五透镜L5具有正光焦度，其物侧面S9和像侧面S10均为凸面；
第六透镜L6具有负光焦度，其物侧面S11和像侧面S12均为凹面；
第七透镜L7具有正光焦度，其物侧面S13和像侧面S14均为凸面；
滤光片G1，其物侧面S15和像侧面S16均为平面；
保护玻璃G2，其物侧面S17和像侧面S18均为平面；
成像面S19为平面；
第五透镜L5与第六透镜L6可胶合组成胶合透镜。
实施例4中的光学镜头中各透镜的相关参数如表4-1所示。
表4-1
实施例4中的光学镜头的非球面透镜的面型参数如表4-2所示。
表4-2
图23示出了实施例4的场曲曲线图，从图中可以看出，子午像面和弧矢像面的场曲控制在±0.05mm以内，说明光学镜头能够极好地矫正场曲。
图24示出了实施例4的F-Theta畸变曲线图，从图中可以看出，光学镜头的F-Theta畸变控制在0～30％以内，说明光学镜头的F-Theta畸变得到有效控制，有利于后期通过软件算法进行还原。
图25示出了实施例4的相对照度曲线图，从图中可以看出，在最大半视场角时光学镜头的相对照度值仍大于40％，说明光学镜头具有较好地相对照度。
图26示出了实施例4的调制传递函数(MTF)曲线图，从图中可以看出，本实施例的MTF值在全视场内均在0.4以上，在0～160lp/mm的范围内，从中心至边缘视场的过程中MTF曲线均匀平滑下降，在低频和高频情况下都具有良好地成像品质和良好地细节分辨能力。
图27示出了实施例4的轴向像差曲线图，从图中可以看出，轴向像差的偏移量控制在±10μm以内，说明光学镜头能够良好地矫正轴向像差。
图28示出了实施例4的垂轴色差曲线图，从图中可以看出，最长波长和最短波长的垂轴色差控制在±2μm以内，说明该光学镜头能够极好地矫正边缘视场的色差以及整个像面的二级光谱。
实施例5
请参阅图29，所示为本申请实施例5中提供的光学镜头的结构示意图，该光学镜头沿光轴从物侧到成像面依次包括：第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、光阑ST、第五透镜L5、第六透镜L6、第七透镜L7以及滤光片G1和保护玻璃G2。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面；
第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面；
第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面；
第四透镜L4具有正光焦度，其物侧面S7h和像侧面S8均为凸面；
光阑ST；
第五透镜L5具有正光焦度，其物侧面S9和像侧面S10均为凸面；
第六透镜L6具有负光焦度，其物侧面S11和像侧面S12均为凹面；
第七透镜L7具有正光焦度，其物侧面S13和像侧面S14均为凸面；
滤光片G1，其物侧面S15和像侧面S16均为平面；
保护玻璃G2，其物侧面S17和像侧面S18均为平面；
成像面S19为平面；
第五透镜L5与第六透镜L6可胶合组成胶合透镜。
实施例5中的光学镜头中各透镜的相关参数如表5-1所示。
表5-1
实施例5中的光学镜头的非球面透镜的面型参数如表5-2所示。
表5-2
图30示出了实施例5的场曲曲线图，从图中可以看出，子午像面和弧矢像面的场曲控制在±0.1mm以内，说明光学镜头能够良好地矫正场曲。
图31示出了实施例5的F-Theta畸变曲线图，从图中可以看出，光学镜头的F-Theta畸变控制在0～24％以内，说明光学镜头的F-Theta畸变得到有效控制，有利于后期通过软件算法进行还原。
图32示出了实施例5的相对照度曲线图，从图中可以看出，在最大半视场角时光学镜头的相对照度值仍大于40％，说明光学镜头具有较好地相对照度。
图33示出了实施例5的调制传递函数(MTF)曲线图，从图中可以看出，本实施例的MTF值在全视场内均在0.4以上，在0～160lp/mm的范围内，从中心至边缘视场的过程中MTF曲线均匀平滑下降，在低频和高频情况下都具有良好地成像品质和良好地细节分辨能力。
图34示出了实施例5的轴向像差曲线图，从图中可以看出，轴向像差的偏移量控制在±10μm以内，说明光学镜头能够良好地矫正轴向像差。
图35示出了实施例5的垂轴色差曲线图，从图中可以看出，最长波长和最短波长的垂轴色差控制在±2μm以内，说明该光学镜头能够极好地矫正边缘视场的色差以及整个像面的二级光谱。
请参阅表6，为上述各实施例对应的光学特性，包括所述光学镜头的有效焦距f、光学总长TTL、光圈数FNO、真实像高IH、视场角FOV以及与所述实施例中每个条件式对应的数值。
表6
综上所述，本申请实施例的光学镜头通过合理的搭配各透镜之间的镜片形状与光焦度组合，实现了同时具备大视场和大像面的优点。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的 至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种光学镜头，共七片透镜，其特征在于，沿光轴从物侧到成像面依次为：
    具有负光焦度的第一透镜，其物侧面为凸面，像侧面为凹面；
    具有负光焦度的第二透镜，其物侧面为凸面，像侧面为凹面；
    具有光焦度的第三透镜，其物侧面为凹面；
    具有正光焦度的第四透镜，其像侧面为凸面；
    具有正光焦度的第五透镜，其物侧面和像侧面均为凸面；
    具有负光焦度的第六透镜，其物侧面和像侧面均为凹面；
    具有正光焦度的第七透镜，其物侧面和像侧面均为凸面；
    所述光学镜头的有效焦距f与最大视场角所对应的真实像高IH满足：4.0＜IH/f＜5.5。
  2. 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与最大视场角所对应的真实像高IH满足：TTL/IH＜4.7。
  3. 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与最大视场角所对应的真实像高IH满足：7.0＜IH/EPD＜11.0。
  4. 根据权利要求1所述的光学镜头，其特征在于，所述光学镜头最大视场角所对应的真实像高IH与最大半视场角所对应的真实像高IHh满足：0.35＜IHh/IH＜0.45。
  5. 根据权利要求1所述的光学镜头，其特征在于，所述光学镜头的有效焦距f、最大视场角θ和最大视场角所对应的真实像高IH满足：1.2＜(IH/2)/(f×(θ/2))＜1.6。
  6. 根据权利要求1所述的光学镜头，其特征在于，所述光学镜头的最大视场角FOV与最大视场角主光线在像面上的入射角CRA满足：4.0＜(FOV/2)/CRA＜6.0。
  7. 根据权利要求1所述的光学镜头，其特征在于，所述光学镜头的有效焦距f与所述第一透镜的焦距f1满足：-14.0＜f1/f＜-7.0。
  8. 根据权利要求1所述的光学镜头，其特征在于，所述光学镜头的有效焦距f与所述第一透镜物侧面曲率半径R1和像侧面曲率半径R2分别满足：10.0＜R1/f，R2/f＜6.0。
  9. 根据权利要求1所述的光学镜头，其特征在于，所述第二透镜物侧面的矢高Sag3和通光半口径d3与所述第二透镜像侧面的矢高Sag4和通光半口径d4满足：0.2＜(Sag3/d3)/(Sag4/d4)＜0.4。
  10. 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与所述第一透镜至所述第六透镜分别沿光轴的中心厚度的总和∑CT满足：0.4＜∑CT/TTL＜0.7。
PCT/CN2023/119754 2022-12-13 2023-09-19 光学镜头 WO2024125017A1 (zh)

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