Optical lens

Abstract

The application provides an optical lens, which comprises seven lenses arranged along an optical axis from an object side to an imaging surface in sequence, wherein the first lens has negative optical power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative optical power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has positive optical power; a diaphragm; the fourth lens has positive optical power, the object side surface and the image side surface of the fourth lens are both convex surfaces; the fifth lens has positive optical power, the object side surface and the image side surface of the fifth lens are both convex surfaces; the sixth lens has negative optical power, the object side surface and the image side surface of the sixth lens are both concave surfaces; and the seventh lens has positive optical power; wherein the effective focal length f of the optical lens and the combined focal length f 13 of the first lens to the third lens satisfy the following conditions: 4.0 < f 13 / f < 20.0. The optical lens provided by the application improves the resolving power of the optical lens, reduces aberration, and improves the imaging quality of the optical lens by reasonably configuring the surface shape of each lens and reasonably matching the optical power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of imaging lenses, in particular to an optical lens. BACKGROUND

[0002] With the continuous improvement of people's requirements for driving experience, vehicle application type optical lenses are used more and more in intelligent driving, and vehicle optical lenses are playing an increasingly important role in the automobile industry.

[0003] Advanced Driver Assistance System (ADAS) plays an important role in intelligent driving. It collects environmental information through various lenses and sensors to ensure the safety of drivers. In addition to the requirements of light, thin, small shape and high pixel, high resolution of the existing ADAS system surround view lens, the optical lens is required to clearly image under low illumination conditions, so it is necessary to develop an optical lens with good imaging effect. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide an optical lens with excellent imaging quality.

[0005] The present application provides an optical lens, which has seven lenses in total, and the lenses are arranged in order along the optical axis from the object side to the imaging surface as follows:

[0006] The first lens with negative focal power, the object side surface is convex, and the image side surface is concave;

[0007] The second lens with negative focal power, the object side surface is concave, and the image side surface is convex;

[0008] The third lens with positive focal power;

[0009] The diaphragm;

[0010] The fourth lens with positive focal power, both the object side surface and the image side surface are convex;

[0011] The fifth lens with positive focal power, both the object side surface and the image side surface are convex;

[0012] The sixth lens with negative focal power, both the object side surface and the image side surface are concave;

[0013] The seventh lens with positive focal power;

[0014] The effective focal length f of the optical lens and the combined focal length f of the first lens to the third lens 13 Meet: 4.0 13 / f<20.0;

[0015] The effective focal length f of the optical lens and the combined focal length f of the fourth lens to the seventh lens47 satisfies: 1.5 < f 47 / f < 3.0.

[0016] Further preferably, the total optical length TTL of the optical lens and the effective focal length f satisfy: 3.0 < TTL / f < 10.0.

[0017] Further preferably, the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 1.0 < IH / f < 2.3.

[0018] Further preferably, the maximum field of view angle FOV of the optical lens, the real image height IH corresponding to the maximum field of view angle, and the clear aperture D1 of the first lens object side satisfy: 0.8 < D1 / IH / tan(FOV / 2) < 2.8.

[0019] Further preferably, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -2.5 < f1 / f < -1.7.

[0020] Further preferably, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -20.0 < f2 / f < -3.0.

[0021] Further preferably, the effective focal length f of the optical lens and the focal length f3 of the third lens satisfy: 2.0 < f3 / f < 5.0.

[0022] Further preferably, the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: 1.0 < f4 / f < 2.6.

[0023] Further preferably, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: 0.5 < f5 / f < 2.5.

[0024] Further preferably, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: f7 / f > 9.0.

[0025] The optical lens provided by the present application improves the resolving power of the optical lens, reduces aberration, and improves the imaging quality of the optical lens by reasonable configuration of each lens surface and reasonable matching of optical power. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the following drawings, in which:

[0027] Figure 1 FIG. 1 is a structural schematic diagram of an optical lens according to an embodiment of the present application.

[0028] Figure 2 Field curvature curve of the optical lens in Embodiment 1 of the present application.

[0029] Figure 3 F-Tanθ distortion curve of the optical lens in Embodiment 1 of the present application.

[0030] Figure 4 Relative illumination curve of the optical lens in Embodiment 1 of the present application.

[0031] Figure 5 MTF curve of the optical lens in Embodiment 1 of the present application.

[0032] Figure 6 Axial aberration curve of the optical lens in Embodiment 1 of the present application.

[0033] Figure 7 Vignetting curve of the optical lens in Embodiment 1 of the present application.

[0034] Figure 8 Structure diagram of the optical lens in Embodiment 2 of the present application.

[0035] Figure 9 Field curvature curve of the optical lens in Embodiment 2 of the present application.

[0036] Figure 10 F-Tanθ distortion curve of the optical lens in Embodiment 2 of the present application.

[0037] Figure 11 Relative illumination curve of the optical lens in Embodiment 2 of the present application.

[0038] Figure 12 MTF curve of the optical lens in Embodiment 2 of the present application.

[0039] Figure 13 Axial aberration curve of the optical lens in Embodiment 2 of the present application.

[0040] Figure 14 Vignetting curve of the optical lens in Embodiment 2 of the present application.

[0041] Figure 15 Structure diagram of the optical lens in Embodiment 3 of the present application.

[0042] Figure 16 Field curvature curve of the optical lens in Embodiment 3 of the present application.

[0043] Figure 17 F-Tanθ distortion curve of the optical lens in Embodiment 3 of the present application.

[0044] Figure 18Relative illuminance curve of the optical lens in Embodiment 3 of the present application.

[0045] Figure 19 MTF curve of the optical lens in Embodiment 3 of the present application.

[0046] Figure 20 Axial aberration curve of the optical lens in Embodiment 3 of the present application.

[0047] Figure 21 Vignetting curve of the optical lens in Embodiment 3 of the present application.

[0048] Figure 22 Structure diagram of the optical lens in Embodiment 4 of the present application.

[0049] Figure 23 Curvature of field curve of the optical lens in Embodiment 4 of the present application.

[0050] Figure 24 F-Tanθ distortion curve of the optical lens in Embodiment 4 of the present application.

[0051] Figure 25 Relative illuminance curve of the optical lens in Embodiment 4 of the present application.

[0052] Figure 26 MTF curve of the optical lens in Embodiment 4 of the present application.

[0053] Figure 27 Axial aberration curve of the optical lens in Embodiment 4 of the present application.

[0054] Figure 28 Vignetting curve of the optical lens in Embodiment 4 of the present application.

[0055] Figure 29 Structure diagram of the optical lens in Embodiment 5 of the present application.

[0056] Figure 30 Curvature of field curve of the optical lens in Embodiment 5 of the present application.

[0057] Figure 31 F-Tanθ distortion curve of the optical lens in Embodiment 5 of the present application.

[0058] Figure 32 Relative illuminance curve of the optical lens in Embodiment 5 of the present application.

[0059] Figure 33 MTF curve of the optical lens in Embodiment 5 of the present application.

[0060] Figure 34 Axial aberration curve of the optical lens in Embodiment 5 of the present application.

[0061] Figure 35 Figure 5 is a graph of the lateral chromatic aberration curve of the optical lens of Example 5 of the present application.

[0062] The following detailed description will further describe the present application with reference to the above figures. DETAILED DESCRIPTION

[0063] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the figures. It will be appreciated that the detailed description is merely descriptive of embodiments of the present application and does not limit the scope of the present application in any way. Throughout the specification, like drawing reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0064] It should be noted that the expressions first, second, third, etc. are used in this specification only to distinguish one feature from another, and do not indicate any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0065] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0066] In this specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0067] It should also be understood that the use of the terms "include", "includes", "including", "has", "have", "having", "comprises", "comprising", or "contains" or "containing" when used in this specification, means that there are other features, elements, or components that are not listed, but are present in the described implementation. In addition, when the expression such as "at least one of... " appears after a list of items, it modifies the entire list of items and does not modify the individual items of the list. Furthermore, when describing implementations of the present application, the use of "may" means "one or more implementations of the present application." Also, the use of the expression "exemplary" is intended to present an example or an illustration.

[0068] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0069] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0070] The optical lens according to the embodiments of the present application sequentially comprises, along the optical axis from the object side to the image side: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a filter and a protective glass.

[0071] In some embodiments, the first lens can have a negative focal power, which is conducive to reducing the incident angle of the light rays, 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 conducive to collecting as much edge field of view light as possible into the rear optical lens, thereby realizing large-angle light collection.

[0072] In some embodiments, the second lens can have a negative focal power, which can effectively share the negative focal power of the front end of the optical lens. The object side of the second lens is concave, and the image side is convex, which is conducive to avoiding excessive light deflection caused by the focal power of the first lens being too concentrated, thereby reducing the difficulty of chromatic aberration correction of the optical lens.

[0073] In some embodiments, the third lens can have a positive focal power, which is conducive to converging the light rays while reducing the light deflection angle, thereby smoothly transitioning the light rays. At the same time, the third lens balances various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0074] In some embodiments, the fourth lens can have a positive focal power, which is conducive to further converging the light rays while reducing the light deflection angle, thereby smoothly transitioning the light rays. Both the object side and the image side of the fourth lens are convex, which balances various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0075] In some embodiments, the fifth lens can have a positive focal power, which is conducive to further converging the light rays while reducing the light deflection angle, thereby smoothly transitioning the light rays. Both the object side and the image side of the fifth lens are convex, which balances various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0076] In some embodiments, the sixth lens can have negative refractive 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 surface and the image side surface of the sixth lens are both concave, which can optimize the chromatic aberration of the optical lens and improve the imaging quality of the optical lens.

[0077] In some embodiments, the seventh lens can have positive refractive power, which is beneficial to suppress the angle of the edge field of view incident on the imaging surface, effectively transfer more light beams to the imaging surface, and improve the imaging quality of the optical lens. Meanwhile, the spherical aberration of the optical lens is also optimized, and the imaging quality of the optical lens is improved.

[0078] In some embodiments, the effective focal length f of the optical lens and the combined focal length f 13 satisfies: 4.0 < f 13 / f < 20.0. Satisfying the above requirements, by reasonably allocating the refractive power of the first lens to the third lens, the light deflection angle of the front end of the lens is reduced, and the generation of various off-axis aberrations is reduced.

[0079] In some embodiments, the effective focal length f of the optical lens and the combined focal length f 47 satisfies: 1.5 < f 47 / f < 3.0. Satisfying the above requirements, by reasonably allocating the refractive power of the fourth lens to the seventh lens, the focal length of the optical lens is balanced, the correction ability of various aberrations of the rear end of the lens is improved, and the imaging quality of the optical lens is improved.

[0080] In some embodiments, the total optical length TTL of the optical lens and the effective focal length f satisfy: 3.0 < TTL / f < 10.0. Satisfying the above requirements ensures sufficient space to adjust the lens structure and optimizes the imaging effect.

[0081] In some embodiments, the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 1.0 < IH / f < 2.3. Satisfying the above range can realize large image surface characteristics and improve the imaging quality of the optical lens.

[0082] In some embodiments, the maximum field of view angle FOV of the optical lens and the real image height IH corresponding to the maximum field of view angle and the clear aperture D1 of the object side surface of the first lens satisfy: 0.8 < D1 / IH / tan(FOV / 2) < 2.8. Satisfying the above range can ensure the balance between the size of the optical lens and the large field of view angle and large image surface.

[0083] In some embodiments, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -2.5 < f1 / f < -1.7. Satisfying the above requirement, the first lens can have appropriate negative refractive power, which is conducive to reducing the incident angle of the incident light, thereby reducing the difficulty of correcting various aberrations of the optical lens.

[0084] In some embodiments, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -20.0 < f2 / f < -3.0. Satisfying the above requirement, the second lens can have appropriate negative refractive power, which is conducive to sharing the negative refractive power of the front end of the optical lens, thereby avoiding excessive deflection of the light caused by excessive concentration of the refractive power of the first lens, and reducing the difficulty of correcting chromatic aberration of the optical lens.

[0085] In some embodiments, the effective focal length f of the optical lens and the focal length f3 of the third lens satisfy: 2.0 < f3 / f < 5.0. Satisfying the above requirement, the third lens can have appropriate positive refractive power, which is conducive to converging light while reducing the deflection angle of the light, smoothly transitioning the light, balancing various aberrations generated by the optical lens, and improving the imaging quality of the optical lens.

[0086] In some embodiments, the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: 1.0 < f4 / f < 2.6. Satisfying the above requirement, the fourth lens can have appropriate positive refractive power, which is conducive to converging light while reducing the deflection angle of the light, smoothly transitioning the light, balancing various aberrations generated by the optical lens, and improving the imaging quality of the optical lens.

[0087] In some embodiments, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: 0.5 < f5 / f < 2.5. Satisfying the above requirement, the fifth lens can have appropriate positive refractive power, which is conducive to converging light while reducing the deflection angle of the light, smoothly transitioning the light, balancing various aberrations generated by the optical lens, and improving the imaging quality of the optical lens.

[0088] In some embodiments, the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy: -1.6 < f6 / f < -0.4. Satisfying the above requirement, the sixth lens can have appropriate negative refractive power, which is conducive to increasing the imaging area of the optical lens; at the same time, the chromatic aberration of the optical lens can be optimized, and the imaging quality of the optical lens can be improved.

[0089] In some embodiments, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: f7 / f > 9.0. Satisfying the above requirement is conducive to suppressing the angle of the incident light in the edge field of view to the imaging surface, effectively transmitting more light beams to the imaging surface, improving the imaging quality of the optical lens; at the same time, the spherical aberration of the optical lens can be optimized, and the imaging quality of the optical lens can be improved.

[0090] In some embodiments, the Abbe number Vd of at least one of the fifth and sixth lenses satisfies: Vd > 80, and the Abbe number Vd5 of the fifth lens and the Abbe number Vd6 of the sixth lens satisfies: Vd5 - Vd6 > 60. Satisfying the above range is beneficial for achieving confocal focusing of visible and infrared light.

[0091] In some embodiments, the radius of curvature R of the object-side surface of the seventh lens 13 The effective focal length f of the optical lens satisfies: -2.5 <R 13 / f<18. The radius of curvature R of the image-side surface of the seventh lens. 14 The effective focal length f of the optical lens satisfies: -2.0 <R 14 / f<18. Meeting the above requirements can reduce various aberrations generated by the seventh lens itself and improve the imaging quality of the optical lens.

[0092] In some embodiments, the fifth lens and the sixth lens can be cemented together to form a cemented lens, which can effectively correct chromatic aberration of the optical lens, reduce the eccentricity sensitivity of the optical lens, balance the aberrations 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 processing difficulty of the optical lens and improving the assembly yield of the optical lens.

[0093] In some embodiments, the second lens, the fourth lens, and the seventh lens may all adopt the surface shape of an aspherical lens to improve the resolution quality.

[0094] To achieve better optical performance, the lens employs multiple aspherical lenses, and the shapes of each aspherical surface of the optical lens satisfy the following equation:

[0095]

[0096] Where 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 vertex of the surface, K is the quadratic surface coefficient, and A, B, C, D, E, and F are the second, fourth, sixth, eighth, tenth, and twelfth order surface coefficients, respectively.

[0097] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical lens are different; for specific differences, please refer to the parameter tables of each embodiment. The following embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered as equivalent substitutions and are included within the protection scope of the present invention.

[0098] Example 1

[0099] Referring to Figure 1 FIG. 1 shows a structural diagram of an optical lens provided in Embodiment 1 of the present application, which comprises, 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 stop 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.

[0100] The first lens L1 has negative focal power, and its object side S1 is a convex surface and its image side S2 is a concave surface;

[0101] The second lens L2 has negative focal power, and its object side S3 is a concave surface and its image side S4 is a convex surface;

[0102] The third lens L3 has positive focal power, and its object side S5 is a concave surface and its image side S6 is a convex surface;

[0103] The stop ST;

[0104] The fourth lens L4 has positive focal power, and its object side S7 and its image side S8 are both convex surfaces;

[0105] The fifth lens L5 has positive focal power, and its object side S9 and its image side S10 are both convex surfaces;

[0106] The sixth lens L6 has negative focal power, and its object side S10 and its image side S11 are both concave surfaces;

[0107] The fifth lens L5 and the sixth lens L6 form a cemented lens group, and the cemented surface S10 is formed by the image side of the fifth lens L5 and the object side of the sixth lens L6;

[0108] The seventh lens L7 has positive focal power, and its object side S12 is a concave surface and its image side S13 is a convex surface;

[0109] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0110] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0111] The imaging surface S18 is a flat surface.

[0112] The related parameters of the lenses in the optical lens in Embodiment 1 are shown in Table 1-1.

[0113] Table 1-1

[0114]

[0115] The surface type parameters of the aspheric lenses in the optical lens in Embodiment 1 are shown in Table 1-2.

[0116] Table 1-2

[0117] Surface Number K A B C D E F S3 -2.46E+00 0.00E+00 4.83E-04 -5.65E-06 6.15E-07 -2.70E-08 4.70E-10 S4 -7.09E+00 0.00E+00 1.73E-04 7.84E-06 -1.01E-07 2.56E-09 -8.09E-11 S7 -3.10E+00 0.00E+00 2.71E-04 -4.36E-05 2.04E-06 -7.10E-08 -2.47E-09 S8 3.83E-01 0.00E+00 6.57E-04 -4.24E-05 2.56E-06 -1.22E-07 5.78E-10 S12 -7.99E-02 0.00E+00 3.32E-03 5.39E-05 -5.65E-06 1.99E-08 1.23E-08 S13 -2.53E+00 0.00E+00 1.31E-03 7.64E-05 -2.53E-06 -1.18E-07 9.97E-09

[0118] In the present embodiment, the field curvature curve, the F-Tanθ distortion curve, the relative illumination curve, the MTF curve, the axial aberration curve, and the lateral chromatic aberration curve of the optical lens are shown in FIGS. 1-5, respectively. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7

[0119] Figure 2 The field curvature curve of Example 1 is shown, which represents the curvature of light rays of different wavelengths on the meridional image surface and the sagittal image surface, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within -0.02mm-0.12mm, which shows that the optical lens can well correct the field curvature.

[0120] Figure 3 The F-Tanθ distortion curve of Example 1 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging surface, the horizontal axis represents the F-Tanθ distortion (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Tanθ distortion of the optical lens is controlled within 0-3%, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0121] Figure 4 The relative illumination curve of Example 1 is shown, which represents the relative illumination value of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 60% at the maximum half field angle, which shows that the optical lens has good relative illumination.

[0122] Figure 5 The MTF (Modulation Transfer Function) curve of Example 1 is shown, which represents the imaging modulation degree of the lens at different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of the present embodiment is above 0.5 within the full field of view, and within the range of 0-160lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in both low and high frequency cases.

[0123] Figure 6 ​The axial aberration curve of the embodiment 1 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the shift of the axial aberration is controlled within ±20 μm, which shows that the optical lens can correct the axial aberration well.

[0124] Figure 7 The curve of the axial aberration of the embodiment 1 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the shift of the axial aberration is controlled within ±20 μm, which shows that the optical lens can correct the axial aberration well.

[0125] Embodiment 2

[0126] Please refer to Figure 8 , which is a structural schematic diagram of the optical lens provided in the embodiment 2 of the present application, and the optical lens comprises, along the optical axis from the object side to the imaging plane, a first lens L1, a second lens L2, a third lens L3, a diaphragm 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.

[0127] The first lens L1 has a negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface;

[0128] The second lens L2 has a negative focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0129] The third lens L3 has a positive focal power, the object side S5 and the image side S6 are both convex surfaces;

[0130] The diaphragm ST;

[0131] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0132] The fifth lens L5 has a positive focal power, the object side S9 and the image side S10 are both convex surfaces;

[0133] The sixth lens L6 has a negative focal power, the object side S10 and the image side S11 are both concave surfaces;

[0134] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface of the image side of the fifth lens L5 and the object side of the sixth lens L6 is S10;

[0135] The seventh lens L7 has positive refractive power, the object side S12 is a concave surface, and the image side S13 is a convex surface;

[0136] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0137] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0138] The imaging surface S18 is a flat surface.

[0139] The related parameters of each lens in the optical lens in Embodiment 2 are shown in Table 2-1.

[0140] Table 2-1

[0141]

[0142] The surface type parameters of the aspherical lens of the optical lens in Embodiment 2 are shown in Table 2-2.

[0143] Table 2-2

[0144] Surface Number K A B C D E F S3 -1.71E+00 0.00E+00 4.42E-04 -6.73E-06 5.89E-07 -2.55E-08 4.78E-10 S4 -8.21E+00 0.00E+00 1.30E-04 5.10E-06 -1.00E-07 2.81E-09 -6.65E-11 S7 -2.98E+00 0.00E+00 1.91E-04 -4.83E-05 1.77E-06 -4.21E-08 -4.91E-09 S8 1.02E+00 0.00E+00 7.08E-04 -3.66E-05 2.40E-06 -1.21E-07 9.33E-10 S12 -3.27E-01 0.00E+00 2.90E-03 9.11E-05 -8.90E-06 2.87E-07 1.09E-08 S13 -2.28E+00 0.00E+00 2.83E-04 6.53E-05 -2.01E-06 -9.42E-08 8.23E-09

[0145] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14

[0146] Figure 9 The field curvature curve of Embodiment 2 is shown, which represents the curvature of light rays of different wavelengths on the meridional image surface and the sagittal image surface, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within 0-0.12 mm, which shows that the optical lens can well correct the field curvature.

[0147] Figure 10 The F-Tanθ distortion curve of Embodiment 2 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging surface, the horizontal axis represents the F-Tanθ distortion (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Tanθ distortion of the optical lens is controlled within 0-1%, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0148] Figure 11 ​The relative luminance curve of the embodiment 2 is shown, which represents the relative luminance values of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative luminance (unit: %). As can be seen from the figure, the relative luminance value of the optical lens is still greater than 65% at the maximum half field angle, which indicates that the optical lens has good relative luminance.

[0149] Figure 12 The MTF (modulation transfer function) curve of the embodiment 2 is shown, which represents the lens imaging modulation degree of different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of the embodiment is above 0.4 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge field of view, and has good imaging quality and good detail resolution capability in the case of low frequency and high frequency.

[0150] Figure 13 The axial aberration curve of the embodiment 2 is shown, which represents the axial aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within-15 μm-25 μm, which indicates that the optical lens can better correct the axial aberration.

[0151] Figure 14 The axial aberration curve of the embodiment 2 is shown, which represents the axial aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within-15 μm-25 μm, which indicates that the optical lens can better correct the axial aberration.

[0152] Embodiment 3

[0153] Please refer to Figure 15 , which is a structural schematic diagram of the optical lens provided in the embodiment 3 of the present application, which comprises, 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 stop 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.

[0154] The first lens L1 has a negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface;

[0155] The second lens L2 has a negative focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0156] The third lens L3 has positive refractive power, the object side S5 is a convex surface, and the image side S6 is a concave surface;

[0157] The diaphragm ST;

[0158] The fourth lens L4 has positive refractive power, the object side S7 and the image side S8 are both convex surfaces;

[0159] The fifth lens L5 has positive refractive power, the object side S9 and the image side S10 are both convex surfaces;

[0160] The sixth lens L6 has negative refractive power, the object side S10 and the image side S11 are both concave surfaces;

[0161] The fifth lens L5 and the sixth lens L6 constitute a cemented lens group, that is, the cemented surface of the image side of the fifth lens L5 and the object side of the sixth lens L6 is S10;

[0162] The seventh lens L7 has positive refractive power, the object side S12 is a convex surface, and the image side S13 is a concave surface;

[0163] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0164] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0165] The imaging surface S18 is a flat surface.

[0166] The related parameters of the lenses in the optical lens in Embodiment 3 are shown in Table 3-1.

[0167] Table 3-1

[0168]

[0169]

[0170] The surface type parameters of the aspherical lens of the optical lens in Embodiment 3 are shown in Table 3-2.

[0171] Table 3-2

[0172] Surface Number K A B C D E F S3 -1.88E+00 0.00E+00 8.63E-04 2.84E-05 -1.83E-07 2.78E-10 2.79E-10 S4 -4.50E+01 0.00E+00 8.84E-04 4.63E-05 -2.54E-07 1.30E-08 3.35E-09 S7 -2.59E+00 0.00E+00 -2.74E-04 -1.75E-05 -2.76E-06 3.67E-07 -2.55E-08 S8 -8.61E-01 0.00E+00 -5.45E-05 -6.55E-05 6.69E-06 -4.26E-07 2.25E-09 S12 4.37E+01 0.00E+00 -5.07E-03 -1.20E-04 1.79E-05 -1.39E-06 1.43E-07 S13 -4.50E+01 0.00E+00 -2.56E-03 3.53E-05 1.03E-05 1.08E-07 5.27E-09

[0173] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the off-axis chromatic aberration curve of the optical lens are shown in FIGS. Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21

[0174] ​Figure 16 The field curvature curve of Example 3 is shown, which represents the curvature of light rays of different wavelengths on the meridional image surface and the sagittal image surface, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within -0.05mm~0.09mm, which shows that the optical lens can well correct the field curvature.

[0175] Figure 17 The F-Tanθ distortion curve of Example 3 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging surface, the horizontal axis represents the F-Tanθ distortion (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Tanθ distortion of the optical lens is controlled within 0~5%, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0176] Figure 18 The relative luminance curve of Example 3 is shown, which represents the relative luminance value of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative luminance (unit: %). As can be seen from the figure, the relative luminance value of the optical lens is still greater than 50% at the maximum half field angle, which shows that the optical lens has good relative luminance.

[0177] Figure 19 The MTF (Modulation Transfer Function) curve of Example 3 is shown, which represents the imaging modulation degree of the lens at different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of the present embodiment is above 0.4 within the full field of view, and within the range of 0~160lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low and high frequency conditions.

[0178] Figure 20 The axial aberration curve of Example 3 is shown, which represents the aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -15μm~20μm, which shows that the optical lens can well correct the axial aberration.

[0179] Figure 21The vertical color aberration curve of embodiment 3 is shown, which represents the color aberration of each wavelength at different image heights on the imaging surface relative to the central wavelength (0.55 μm), the horizontal axis represents the vertical color aberration value of each wavelength relative to the central wavelength (unit: μm), and the vertical axis represents the normalized field angle. As can be seen from the figure, the vertical color aberration of the longest wavelength and the shortest wavelength is controlled within 0-7 μm, which indicates that the optical lens can well correct the color aberration of the edge field of view and the secondary spectrum of the entire image surface.

[0180] Embodiment 4

[0181] Referring to Figure 22 , which is a structural schematic diagram of the optical lens provided in embodiment 4 of the present application, the optical lens comprises, 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 stop 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.

[0182] The first lens L1 has a negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface;

[0183] The second lens L2 has a negative focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0184] The third lens L3 has a positive focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface;

[0185] The stop ST;

[0186] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0187] The fifth lens L5 has a positive focal power, the object side S9 and the image side S10 are both convex surfaces;

[0188] The sixth lens L6 has a negative focal power, the object side S10 and the image side S11 are both concave surfaces;

[0189] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface of the image side of the fifth lens L5 and the object side of the sixth lens L6 is S10;

[0190] The seventh lens L7 has a positive focal power, the object side S12 is a concave surface, and the image side S13 is a convex surface;

[0191] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0192] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0193] The imaging surface S18 is a flat surface.

[0194] The related parameters of each lens in the optical lens in embodiment 4 are shown in table 4-1.

[0195] Table 4-1

[0196]

[0197] The surface type parameters of the aspherical lens of the optical lens in embodiment 4 are shown in table 4-2.

[0198] Table 4-2

[0199] Surface Number K A B C D E F S3 -9.26E-01 0.00E+00 1.59E-04 -6.29E-06 3.49E-07 -1.10E-08 1.09E-10 S4 -6.00E+00 0.00E+00 -4.90E-05 3.23E-06 2.62E-08 -1.29E-09 8.36E-12 S7 -1.63E+01 0.00E+00 -5.07E-06 -5.92E-05 1.42E-06 -7.80E-08 -1.28E-08 S8 1.20E+00 0.00E+00 6.13E-04 -2.20E-05 4.32E-07 -4.58E-08 -1.04E-09 S12 1.67E-01 0.00E+00 2.90E-03 -2.58E-05 -6.02E-06 2.98E-07 -2.33E-10 S13 -4.71E+00 0.00E+00 1.44E-03 3.72E-05 -4.99E-06 9.74E-08 4.48E-09

[0200] In this embodiment, the field curvature curve, F-Tanθ distortion curve, relative illumination curve, MTF curve, axial aberration curve and transverse chromatic aberration curve of the optical lens are shown in FIGS. 4-1 to 4-6 respectively. Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28

[0201] Figure 23 The field curvature curve of embodiment 4 is shown, which represents the curvature degree of light rays of different wavelengths on the meridional image surface and sagittal image surface, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field angle (unit: °). It can be seen from the figure that the field curvature of the meridional image surface and the sagittal image surface is controlled within-0.03mm~0.06mm, which shows that the optical lens can well correct the field curvature.

[0202] Figure 24 The F-Tanθ distortion curve of embodiment 4 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths on the imaging surface at different image heights, the horizontal axis represents the F-Tanθ distortion (unit: %), and the vertical axis represents the half field angle (unit: °). It can be seen from the figure that the F-Tanθ distortion of the optical lens is controlled within-40%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0203] Figure 25 The relative illumination curve of embodiment 4 is shown, which represents the relative illumination value of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, which shows that the optical lens has good relative illumination.

[0204] Figure 26 ​The MTF (Modulation Transfer Function) curve of the embodiment 4 is shown, which represents the lens imaging modulation degree of different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. It can be seen from the figure that the MTF value of the embodiment is above 0.4 in the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge field of view, and has good imaging quality and good detail resolution capability in the case of low frequency and high frequency.

[0205] Figure 27 The axial aberration curve of the embodiment 4 is shown, which represents the aberration of the optical axis at the imaging surface at each wavelength, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. It can be seen from the figure that the shift amount of the axial aberration is controlled within-10 μm-15 μm, which indicates that the optical lens can better correct the axial aberration.

[0206] Figure 28 The curve of the embodiment 4 is shown, which represents the color difference of different image heights on the imaging surface at each wavelength relative to the center wavelength (0.55 μm), the horizontal axis represents the vertical color difference value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field angle. It can be seen from the figure that the vertical color difference of the longest wavelength and the shortest wavelength is controlled within-2 μm-7 μm, which indicates that the optical lens can very well correct the color difference of the edge field of view and the secondary spectrum of the entire image surface.

[0207] Embodiment 5

[0208] Please refer to Figure 29 , which is a structural schematic diagram of the optical lens provided in the embodiment 5 of the present application, which comprises, 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 stop 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.

[0209] The first lens L1 has a negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface;

[0210] The second lens L2 has a negative focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0211] The third lens L3 has a positive focal power, the object side S5 and the image side S6 are both convex surfaces;

[0212] The stop ST;

[0213] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0214] The fifth lens L5 has positive refractive power, and both the object side S9 and the image side S10 are convex surfaces;

[0215] The sixth lens L6 has negative refractive power, and both the object side S10 and the image side S11 are concave surfaces;

[0216] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface of the image side of the fifth lens L5 and the object side of the sixth lens L6 is S10;

[0217] The seventh lens L7 has positive refractive power, and the object side S12 is a concave surface, and the image side S13 is a convex surface;

[0218] Both the object side S14 and the image side S15 of the filter G1 are flat surfaces;

[0219] Both the object side S16 and the image side S17 of the protective glass G2 are flat surfaces;

[0220] The imaging surface S18 is a flat surface.

[0221] The related parameters of each lens in the optical lens in Embodiment 5 are shown in Table 5-1.

[0222] Table 5-1

[0223]

[0224] The surface type parameters of the aspherical lens of the optical lens in Embodiment 5 are shown in Table 5-2.

[0225] Table 5-2

[0226] Surface Number K A B C D E F S3 -9.93E-01 0.00E+00 2.62E-04 -5.95E-06 2.54E-07 -7.51E-09 8.31E-11 S4 -8.62E+00 0.00E+00 4.35E-05 4.03E-06 -1.22E-08 -1.22E-10 3.39E-13 S7 -1.52E+01 0.00E+00 -1.34E-05 -5.66E-05 8.95E-08 7.73E-08 -2.06E-08 S8 1.60E+00 0.00E+00 4.82E-04 -2.51E-05 1.56E-06 -1.27E-07 1.72E-09 S12 -3.89E-01 0.00E+00 2.42E-03 -2.31E-05 -7.82E-06 2.40E-07 6.02E-09 S13 -3.02E+00 0.00E+00 1.43E-03 1.68E-05 -6.30E-06 1.50E-07 3.49E-09

[0227] In this embodiment, the field curvature curve, F-Tanθ distortion curve, relative luminance curve, MTF curve, axial aberration curve, and transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 30 、 Figure 31 、 Figure 32 、 Figure 33 、 Figure 34 、 Figure 35

[0228] Figure 30 The field curvature curve of Embodiment 5 is shown, which represents the curvature degree of light rays of different wavelengths on the meridional image surface and the sagittal image surface, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within-0.02mm-0.06mm, which shows that the optical lens can well correct the field curvature.

[0229] Figure 31 ​F-Tanθ distortion curve of embodiment 5 is shown, which represents F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging plane, the horizontal axis represents F-Tanθ distortion (unit: %), and the vertical axis represents half field angle (unit: °). As can be seen from the figure, the F-Tanθ distortion of the optical lens is controlled within -40%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0230] Figure 32 The relative illumination curve of embodiment 5 is shown, which represents the relative illumination value of different field angles on the imaging plane, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, indicating that the optical lens has good relative illumination.

[0231] Figure 33 The MTF (Modulation Transfer Function) curve of embodiment 5 is shown, which represents the imaging modulation degree of the lens at different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of the embodiment is above 0.4 within the full field of view, and in the range of 0~160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge field of view, and has good imaging quality and good detail resolution ability in low and high frequency cases.

[0232] Figure 34 The axial aberration curve of embodiment 5 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -10 μm~15 μm, indicating that the optical lens can better correct the axial aberration.

[0233] Figure 35 The axial aberration curve of embodiment 5 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -10 μm~15 μm, indicating that the optical lens can better correct the axial aberration.

[0234] Please refer to Table 6, which is the optical properties corresponding to each of the above embodiments, including the effective focal length f, the total optical length TTL, the aperture value FNO, the real image height IH, and the maximum field of view FOV of the optical lens, and the numerical values corresponding to each conditional expression in each embodiment.

[0235] Table 6

[0236] Parameter and Condition Formula Example 1 Example 2 Example 3 Example 4 Example 5 f (mm) 7.80 7.95 7.66 4.35 4.39 TTL (mm) 39.95 39.13 27.94 40.00 40.00 IH (mm) 9.25 9.25 9.25 9.25 9.25 FOV (°) 60.00 60.00 60.00 120.00 120.00 CRA (°) 20.38 20.49 30.15 21.03 22.51 FNO 2.00 2.00 2.00 2.00 2.00 EPD (mm) 3.90 3.98 3.83 2.17 2.20 TTL / f 5.12 4.92 3.65 9.20 9.11 TTL / IH 4.32 4.23 3.02 4.32 4.32 (IH / 2) / (f x tan(FOV / 2)) 1.03 1.01 1.05 0.61 0.61 FOV / FNO (°) 30.00 30.00 30.00 60.00 60.00 IH / EPD 2.37 2.33 2.41 4.26 4.21 IH / f 1.19 1.16 1.21 2.13 2.11 BFL / f 0.62 0.45 0.51 1.11 0.82 (FOV / 2) / CRA 1.47 1.46 0.99 2.85 2.67 FOV*f / IH 50.56 51.56 49.72 56.38 56.97 TTL / IH / FOV 0.29 0.28 0.20 0.14 0.14 [D1 / IH / tan(FOV / 2)] 2.61 2.54 2.29 0.96 0.94 [f1 / f] -2.35 -2.23 -2.21 -1.96 -1.97 [f2 / f] -8.81 -3.68 -3.36 -19.65 -7.43 [f3 / f] 3.00 2.11 3.25 4.89 3.73 f4 / f 1.49 1.40 1.08 2.48 2.50 f5 / f 1.80 1.74 0.71 2.32 2.16 f6 / f -1.19 -1.28 -0.49 -1.55 -1.44 f7 / f 2.22E+05 5.56E+04 3.42E+09 10.58 9.31 f 13 / f]]> 11.63 9.78 4.27 18.39 11.67 f 47 / f]]> 1.82 1.74 2.04 2.71 2.71 [R 13 / f]] -0.66 -0.50 16.74 -2.05 -1.57 [R 14 / f]] -0.73 -0.58 16.67 -1.76 -1.41

[0237] In summary of the above embodiments, the optical lens provided by the present application has infrared confocal function, meets the clarity requirement of imaging in day and night, improves the resolving power of the optical lens, reduces aberration, and improves the imaging quality of the optical lens through reasonable configuration of each lens surface and reasonable matching of optical power.

[0238] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0239] The above described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An optical lens, in total seven pieces of lenses, characterized in that, In order from the object side to the imaging plane along the optical axis, there are in sequence: a first lens with negative refractive power, whose object side surface is a convex surface and whose image side surface is a concave surface; a second lens with negative refractive power, whose object side surface is a concave surface and whose image side surface is a convex surface; a third lens with positive refractive power; a diaphragm; a fourth lens with positive refractive power, whose object side surface and image side surface are both convex surfaces; a fifth lens with positive refractive power, whose object side surface and image side surface are both convex surfaces; a sixth lens with negative refractive power, whose object side surface and image side surface are both concave surfaces; a seventh lens with positive refractive power; An effective focal length f of the optical lens and a combined focal length f of the first lens to the third lens satisfy: 13 4.0 < f 13 f < 20.0; An effective focal length f of the optical lens and a combined focal length f of the fourth lens to the seventh lens satisfy: 47 1.5 < f 47 f < 3.0; an effective focal length f of the optical lens and a focal length f7 of the seventh lens satisfy: f7 / f>9.

0.

2. The optical lens of claim 1, wherein, An optical total track length TTL of the optical lens and the effective focal length f satisfy: 3.0 3. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a real image height IH corresponding to a maximum field of view angle satisfy: 1.0 4. The optical lens of claim 1, wherein, A maximum field of view angle FOV of the optical lens and a real image height IH corresponding to the maximum field of view angle and an aperture diameter D1 of the object side surface of the first lens satisfy: 0.8 5. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a focal length f1 of the first lens satisfy: -2.5 6. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a focal length f2 of the second lens satisfy: -20.0 7. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a focal length f3 of the third lens satisfy: 2.0 8. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a focal length f4 of the fourth lens satisfy: 1.0 9. The optical lens of claim 1, wherein, An effective focal length f of the optical lens and a focal length f5 of the fifth lens satisfy: 0.5 An effective focal length f of the optical lens and a focal length f5 of the fifth lens satisfy: 0.5

Images