Optical lens

Abstract

The application provides an optical lens, which comprises seven lenses in sequence along an optical axis from an object side to an imaging surface, and the seven lenses comprise: a first lens with negative optical power, wherein the object side surface is a convex surface and the image side surface is a concave surface; a second lens with negative optical power, wherein the object side surface and the image side surface are both concave surfaces; a third lens with positive optical power, wherein the object side surface and the image side surface are both convex surfaces; a fourth lens with positive optical power, wherein the object side surface and the image side surface are both convex surfaces; a fifth lens with negative optical power, wherein the object side surface and the image side surface are both concave surfaces; a sixth lens with positive optical power, wherein the object side surface is a convex surface; and a seventh lens with positive optical power, wherein the object side surface is a convex surface and the image side surface is a concave surface. The optical lens provided by the application improves the imaging quality of the optical lens, reduces aberration and improves the imaging quality of the optical lens through reasonable configuration of the surface type of each lens and reasonable matching of 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 the position of vehicle optical lenses in the automobile industry is continuously improved.

[0003] Advanced Driver Assistance System (ADAS) plays an important role in intelligent driving, which collects environmental information through various lenses combined with sensors to ensure the safety of drivers. Some lenses of the existing ADAS system adopt wide-angle lenses, which have large aberration, large field curvature, poor imaging quality and other problems, and are difficult to meet the needs of users. Therefore, 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 the advantages of excellent imaging quality.

[0005] The present application provides an optical lens, which comprises seven lenses in sequence along the optical axis from the object side to the imaging surface:

[0006] The first lens with negative focal power has a convex object side and a concave image side;

[0007] The second lens with negative focal power has a concave object side and a concave image side;

[0008] The third lens with positive focal power has a convex object side and a convex image side;

[0009] The fourth lens with positive focal power has a convex object side and a convex image side;

[0010] The fifth lens with negative focal power has a concave object side and a concave image side;

[0011] The sixth lens with positive focal power has a convex object side;

[0012] The seventh lens with positive focal power has a convex object side and a concave image side;

[0013] The object side curvature radius R3 of the second lens and the image side curvature radius R4 of the second lens satisfy: -5.0<(R3-R4) / (R3+R4)<-1.5.

[0014] Further preferably, the total optical length TTL of the optical lens and the sum ∑CT of the center thicknesses of the first lens to the seventh lens along the optical axis respectively satisfy: 0.6<∑CT / TTL<0.7.

[0015] Further preferably, a central thickness CT2 of the second lens along the optical axis satisfies: 1.0 < CT2 / f < 3.0.

[0016] Further preferably, an optical total track length TTL of the optical lens satisfies: 9.0 < TTL / f < 13.0.

[0017] Further preferably, an effective focal length f of the optical lens and an arc θ of the maximum half field of view and a real image height IH corresponding to the maximum field of view satisfy: 0.8 < (IH / 2) / (f x θ) < 0.85.

[0018] Further preferably, a maximum field of view FOV of the optical lens and an aperture value FNO satisfy: 80° < FOV / FNO < 115°.

[0019] Further preferably, an effective focal length f of the optical lens and an optical back focal length BFL satisfy: 0.95 < BFL / f < 1.4.

[0020] Further preferably, an effective focal length f of the optical lens and a focal length f1 of the first lens satisfy: -3.0 < f1 / f < -2.0.

[0021] Further preferably, an effective focal length f of the optical lens and a focal length f2 of the second lens satisfy: -3.0 < f2 / f < -2.0.

[0022] Further preferably, an effective focal length f of the optical lens and a focal length f3 of the third lens satisfy: 2.0 < f3 / f < 3.0.

[0023] The optical lens provided by the present application improves the imaging quality 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

[0024] 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:

[0025] Figure 1 FIG. 1 is a structure diagram of an optical lens according to an embodiment of the present application.

[0026] Figure 2 FIG. 2 is a field curvature curve of the optical lens according to the embodiment of the present application.

[0027] Figure 3 FIG. 3 is an F-Theta distortion curve of the optical lens according to the embodiment of the present application.

[0028] Figure 4 Relative illuminance curve of the optical lens in Embodiment 1 of the present application.

[0029] Figure 5 MTF curve of the optical lens in Embodiment 1 of the present application.

[0030] Figure 6 Axial aberration curve of the optical lens in Embodiment 1 of the present application.

[0031] Figure 7 Vignetting curve of the optical lens in Embodiment 1 of the present application.

[0032] Figure 8 Structure diagram of the optical lens in Embodiment 2 of the present application.

[0033] Figure 9 Curvature of field curve of the optical lens in Embodiment 2 of the present application.

[0034] Figure 10 F-Theta distortion curve of the optical lens in Embodiment 2 of the present application.

[0035] Figure 11 Relative illuminance curve of the optical lens in Embodiment 2 of the present application.

[0036] Figure 12 MTF curve of the optical lens in Embodiment 2 of the present application.

[0037] Figure 13 Axial aberration curve of the optical lens in Embodiment 2 of the present application.

[0038] Figure 14 Vignetting curve of the optical lens in Embodiment 2 of the present application.

[0039] Figure 15 Structure diagram of the optical lens in Embodiment 3 of the present application.

[0040] Figure 16 Curvature of field curve of the optical lens in Embodiment 3 of the present application.

[0041] Figure 17 F-Theta distortion curve of the optical lens in Embodiment 3 of the present application.

[0042] Figure 18 Relative illuminance curve of the optical lens in Embodiment 3 of the present application.

[0043] Figure 19 MTF curve of the optical lens in Embodiment 3 of the present application.

[0044] Figure 20Axial aberration curve of the optical lens in Embodiment 3 of the present application.

[0045] Figure 21 Curvature of field curve of the optical lens in Embodiment 3 of the present application.

[0046] Figure 22 Structure diagram of the optical lens in Embodiment 4 of the present application.

[0047] Figure 23 Curvature of field curve of the optical lens in Embodiment 4 of the present application.

[0048] Figure 24 F-Theta distortion curve of the optical lens in Embodiment 4 of the present application.

[0049] Figure 25 Relative luminance curve of the optical lens in Embodiment 4 of the present application.

[0050] Figure 26 MTF curve of the optical lens in Embodiment 4 of the present application.

[0051] Figure 27 Axial aberration curve of the optical lens in Embodiment 4 of the present application.

[0052] Figure 28 Curvature of field curve of the optical lens in Embodiment 4 of the present application.

[0053] Figure 29 Structure diagram of the optical lens in Embodiment 5 of the present application.

[0054] Figure 30 Curvature of field curve of the optical lens in Embodiment 5 of the present application.

[0055] Figure 31 F-Theta distortion curve of the optical lens in Embodiment 5 of the present application.

[0056] Figure 32 Relative luminance curve of the optical lens in Embodiment 5 of the present application.

[0057] Figure 33 MTF curve of the optical lens in Embodiment 5 of the present application.

[0058] Figure 34 Axial aberration curve of the optical lens in Embodiment 5 of the present application.

[0059] Figure 35 Curvature of field curve of the optical lens in Embodiment 5 of the present application.

[0060] Figure 36 Structure diagram of the optical lens in Embodiment 6 of the present application.

[0061] Figure 37 Field curvature curve for the optical lens of Example 6 of the present application.

[0062] Figure 38 F-Theta distortion curve for the optical lens of Example 6 of the present application.

[0063] Figure 39 Relative illuminance curve for the optical lens of Example 6 of the present application.

[0064] Figure 40 MTF curve for the optical lens of Example 6 of the present application.

[0065] Figure 41 Axial aberration curve for the optical lens of Example 6 of the present application.

[0066] Figure 42 Decentration curve for the optical lens of Example 6 of the present application.

[0067] The following detailed description will further describe the present application with reference to the above drawings. DETAILED DESCRIPTION

[0068] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be noted that these detailed descriptions are only descriptions of embodiments of the present application and are not intended in any way to limit the scope of the present application. 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.

[0069] It is to be noted that, in the present specification, the expressions first, second, third and the like are used only to distinguish one feature from another feature, and do not indicate any limitation of 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.

[0070] In the drawings, the thickness, size, and shape of lenses have been slightly exaggerated for the sake of convenience in explanation. Specifically, the shape of a spherical surface or an aspherical surface shown in the drawings is shown by way of example. That is, the shape of a spherical surface or an aspherical surface is not limited to the shape of a spherical surface or an aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0071] In the present disclosure, 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.

[0072] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" means that one or more embodiments of the present application. Also, the word "exemplary" is intended to mean an example or an illustration.

[0073] 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 should also be understood that the terms 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.

[0074] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0075] The optical lens of the embodiments of the present application comprises, in order from the object side to the image plane along the optical axis, 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.

[0076] In some embodiments, the first lens can have a negative focal power, the object side surface thereof is convex, and the image side surface thereof is concave. The second lens can have a negative focal power, the object side surface and the image side surface thereof are concave. The third lens can have a positive focal power, the object side surface and the image side surface thereof are convex. The fourth lens can have a positive focal power, the object side surface and the image side surface thereof are convex. The fifth lens can have a negative focal power, the object side surface and the image side surface thereof are concave. The sixth lens can have a positive focal power, the object side surface thereof is convex. The seventh lens can have a positive focal power, the object side surface thereof is convex, and the image side surface thereof is concave.

[0077] In some embodiments, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: -5.0 < (R3-R4) / (R3+R4) < -1.5. By satisfying the above range, using a symmetric design and controlling the radius of curvature of the image side surface to be large, not only can the spherical aberration generated when the light passes through the second lens be reduced, but also the optical distortion generated at the edge field angle can be reduced.

[0078] In some embodiments, the total length TTL of the optical lens and the sum ∑CT of the central thicknesses of the first lens to the seventh lens along the optical axis satisfy: 0.6 < ∑CT / TTL < 0.7. By satisfying the above range, the field curvature of the optical lens can be corrected.

[0079] In some embodiments, the central thickness CT2 of the second lens along the optical axis and the effective focal length f of the optical lens satisfy: 1.0 < CT2 / f < 3.0. By satisfying the above range, the thickness sensitivity of the optical lens can be reduced, the field curvature and distortion of the optical lens can be effectively corrected, and thus the optical lens can obtain good image quality in the full field of view.

[0080] In some embodiments, the total length TTL of the optical lens and the effective focal length f satisfy: 9.0 < TTL / f < 13.0. By satisfying the above range, there is enough space to adjust the lens structure, and the imaging effect is optimized.

[0081] In some embodiments, the effective focal length f of the optical lens, the radian θ of the maximum half field of view, and the real image height IH corresponding to the maximum field of view satisfy: 0.8 < (IH / 2) / (f x θ) < 0.85. By satisfying the above range, the imaging area of the optical lens can be increased while the field of view and the focal length of the lens remain unchanged, and the optical lens has small distortion.

[0082] In some embodiments, the maximum field of view FOV of the optical lens and the aperture value FNO satisfy: 80° < FOV / FNO < 115°. By satisfying the above range, the relationship between the field of view and the aperture can be balanced.

[0083] In some embodiments, the effective focal length f of the optical lens and the optical back focal length BFL satisfy: 0.95 < BFL / f < 1.4. By satisfying the above range, the interference between the lens and the imaging chip can be reduced, and thus the correction difficulty of the CRA is reduced.

[0084] In some embodiments, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -3.0 < f1 / f < -2.0. By satisfying the above range, the first lens can have an appropriate negative focal length, which is conducive to reducing the inclination angle of the incident light and collecting as much edge field light as possible into the rear optical lens, thereby realizing large-angle light collection.

[0085] In some embodiments, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -3.0 < f2 / f < -2.0. Satisfying the above range, the second lens can have appropriate negative refractive power, can share the negative refractive power of the front end of the lens, thereby reducing the excessive light deflection caused by the excessive concentration of the refractive power of the first lens, and reducing the difficulty of chromatic aberration correction of the optical lens.

[0086] 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 < 3.0. Satisfying the above range, the third lens can have appropriate positive refractive power, can improve the light convergence ability of the optical lens, is conducive to correcting the astigmatism and field curvature introduced by the front end of the lens, reduces the light deflection angle, and makes the light trend smooth transition, thereby 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 f4 of the fourth lens satisfy: 2.0 < f4 / f < 3.0. Satisfying the above range, the fourth lens can have appropriate positive refractive power, can receive as much light as possible from the front of the diaphragm, and improve the relative luminance.

[0088] In some embodiments, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: 4.5 < f7 / f < 6.0. Satisfying the above range, the seventh lens can have appropriate positive refractive power, make the light trend smooth, reduce the deviation of the incident angle and the exit angle of the light of different fields of view, make the light transition smoothly, thereby reducing the tolerance sensitivity, and being conducive to improving the yield of the optical lens.

[0089] In some embodiments, 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; 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.

[0090] In order to make the system have better optical performance, multiple aspheric lenses are used in the lens, and the shape of each aspheric surface of the optical lens satisfies the following equation:

[0091]

[0092] Wherein, z is the distance of the curved surface and the vertex of the curved surface in the direction of the optical axis, h is the distance from the optical axis to the curved surface, c is the curvature of the vertex of the curved surface, K is the quadratic surface coefficient, A, B, C, D, E, F are the second order, fourth order, sixth order, eighth order, tenth order, and twelfth order curved surface coefficients, respectively.

[0093] The application will be further described in the following embodiments. In each embodiment, the thickness, the radius of curvature, the material selection of each lens in the optical lens are different, and the specific differences can be referred to the parameter table of each embodiment. The following embodiments are only the preferred embodiments of the application, but the embodiments of the application are not limited to the following embodiments only, any changes, substitutions, combinations or simplifications made without departing from the innovative points of the application should be regarded as equivalent replacement, and are included in the protection scope of the application.

[0094] Embodiment 1

[0095] Please refer to Figure 1 , which is a structural schematic diagram of the optical lens provided in embodiment 1 of the application, and 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 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.

[0096] The first lens L1 has negative optical power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface;

[0097] The second lens L2 has negative optical power, and the object side surface S3 and the image side surface S4 are both concave surfaces;

[0098] The third lens L3 has positive optical power, and the object side surface S5 and the image side surface S6 are both convex surfaces;

[0099] The diaphragm ST;

[0100] The fourth lens L4 has positive optical power, and the object side surface S7 and the image side surface S8 are both convex surfaces;

[0101] The fifth lens L5 has negative optical power, and the object side surface S9 and the image side surface S10 are both concave surfaces;

[0102] The sixth lens L6 has positive optical power, and the object side surface S10 and the image side surface S11 are both convex surfaces;

[0103] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface of the image side surface of the fifth lens L5 and the object side surface of the sixth lens L6 is S10;

[0104] The seventh lens L7 has positive optical power, and the object side surface S12 is a convex surface, and the image side surface S13 is a concave surface;

[0105] The object side surface S14 and the image side surface S15 of the filter G1 are both flat surfaces;

[0106] The object side surface S16 and the image side surface S17 of the protective glass G2 are both flat surfaces;

[0107] The imaging surface S18 is a plane.

[0108] The related parameters of each lens in the optical lens in Embodiment 1 are shown in Table 1-1.

[0109] Table 1-1

[0110]

[0111]

[0112] The surface type parameters of the aspherical lens of the optical lens in Embodiment 1 are shown in Table 1-2.

[0113] Table 1-2

[0114] Surface Number K A B C D E F S3 -2.13E+00 0.00E+00 9.07E-05 6.09E-06 -2.62E-07 9.84E-09 -1.56E-10 S4 1.11E+01 0.00E+00 6.87E-04 1.03E-05 1.83E-06 -1.28E-07 6.98E-09 S7 -1.63E+00 0.00E+00 3.58E-05 1.51E-05 -3.41E-06 2.17E-07 -1.13E-08 S8 9.21E-01 0.00E+00 -6.18E-04 1.19E-04 -7.91E-06 3.92E-07 -1.24E-08 S12 -2.44E+00 0.00E+00 3.67E-05 6.12E-06 -8.59E-07 1.91E-08 -6.18E-10 S13 -6.62E+00 0.00E+00 2.84E-04 -1.54E-05 6.57E-07 -5.69E-08 9.05E-10

[0115] In this embodiment, the field curvature curve, F-Theta distortion curve, relative illumination curve, MTF curve, axial aberration curve, and transverse aberration curve of the optical lens are shown in FIGS. 1-1 to 1-6, respectively. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7

[0116] Figure 2 FIG. 1-1 shows the field curvature curve of Embodiment 1, which represents the curvature of the meridional image surface and sagittal image surface of light rays of different wavelengths, with the horizontal axis representing the offset (unit: mm) and the vertical axis representing the half field angle (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and sagittal image surface is controlled within -0.05 mm to 0.02 mm, which indicates that the optical lens can well correct the field curvature.

[0117] Figure 3 FIG. 1-2 shows the F-Theta distortion curve of Embodiment 1, which represents the F-Theta distortion of light rays of different wavelengths at different image heights on the imaging surface, with the horizontal axis representing the F-Theta distortion value (unit: %) and the vertical axis representing the half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -20% to 0, and the image compression in the edge angle region is relatively flat, effectively improving the clarity of the expanded image.

[0118] Figure 4 FIG. 1-3 shows the relative illumination curve of Embodiment 1, which represents the relative illumination value of different field angles on the imaging surface, with the horizontal axis representing the half field angle (unit: °) and the vertical axis representing the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 90% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0119] ​Figure 5 The MTF (Modulation Transfer Function) curve of the optical lens of Example 1 is shown, which represents the 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 present embodiment is above 0.5 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 of the field of view, and has good imaging quality and good detail resolution capability in both low and high frequency cases.

[0120] Figure 6 The axial aberration curve of Example 1 is shown, which represents the aberration of the optical axis at the imaging plane at each wavelength, 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 -4 μm-8 μm, which shows that the optical lens can better correct the axial aberration.

[0121] Figure 7 The curve of the axial color difference of Example 1 is shown, which represents the color difference of different image heights on the imaging plane with respect to the center wavelength (0.55 μm) at each wavelength, the horizontal axis represents the axial color difference value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field of view angle. As can be seen from the figure, the axial color difference of the longest wavelength and the shortest wavelength is controlled within -1 μm-2 μm, which shows 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 plane.

[0122] Example 2

[0123] Please refer to Figure 8 , which is a structural schematic diagram of the optical lens provided in Example 2 of the present application. Compared with Example 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0124] The related parameters of each lens in the optical lens in Example 2 are shown in Table 2-1.

[0125] Table 2-1

[0126]

[0127]

[0128] The surface type parameters of the aspherical lens of the optical lens in Example 2 are shown in Table 2-2.

[0129] Table 2-2

[0130] Surface Number K A B C D E F S3 -3.11E+00 0.00E+00 1.55E-04 9.60E-08 -1.48E-07 7.39E-09 -1.03E-10 S4 2.73E+01 0.00E+00 9.39E-04 -9.72E-07 2.44E-06 -1.81E-07 7.73E-09 S7 -2.29E+00 0.00E+00 -2.38E-05 6.03E-06 -4.54E-06 8.02E-08 -1.18E-08 S8 1.29E+00 0.00E+00 -9.44E-04 1.87E-04 -1.12E-05 4.32E-07 -6.31E-09 S12 -2.91E+00 0.00E+00 1.86E-04 6.22E-06 -1.08E-06 2.38E-08 -7.93E-10 S13 -6.20E+00 0.00E+00 3.63E-04 -1.36E-05 8.15E-07 -9.21E-08 1.67E-09

[0131] In the present embodiment, the field curvature curve, the F-Theta distortion curve, the relative illumination curve, the MTF curve, the axial aberration curve, and the transverse aberration curve of the optical lens are shown in Figs. 1-6, respectively. Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 .

[0132] Figure 9 Fig. 1 shows the field curvature curve of Example 2, which represents the curvature of light rays of different wavelengths at the sagittal image plane and the tangential image plane, 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 sagittal image plane and the tangential image plane is controlled within -0.05 mm-0.01 mm, which indicates that the optical lens can well correct the field curvature.

[0133] Figure 10 Fig. 2 shows the F-Theta distortion curve of Example 2, which represents the F-Theta distortion of light rays of different wavelengths at different image heights on the imaging plane, the horizontal axis represents the F-Theta distortion value (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -18%-0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0134] Figure 11 Fig. 3 shows the relative illumination curve of Example 2, which represents the relative illumination value at 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 85% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0135] Figure 12 Fig. 4 shows the MTF (Modulation Transfer Function) curve of Example 2, which represents the imaging modulation degree of the lens at different spatial frequencies in 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 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 of the field of view, and has good imaging quality and good detail resolution ability in both low frequency and high frequency cases.

[0136] Figure 13The axial aberration curve of the optical lens of embodiment 2 is shown in FIG. 2, 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 -6 μm ~ 12 μm, which indicates that the optical lens can correct the axial aberration well.

[0137] Figure 14 The sagittal chromatic aberration curve of the optical lens of embodiment 2 is shown in FIG. 3, which represents the chromatic aberration of each wavelength at different image heights on the imaging plane relative to the central wavelength (0.55 μm), the horizontal axis represents the sagittal chromatic 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 sagittal chromatic aberration of the longest wavelength and the shortest wavelength is controlled within -1 μm ~ 2 μm, which indicates that the optical lens can correct the chromatic aberration of the edge field and the secondary spectrum of the entire image plane very well.

[0138] Embodiment 3

[0139] Please refer to Figure 15 , which is a structural schematic diagram of the optical lens provided in embodiment 3 of the present application. Compared with embodiment 1, the difference between the present embodiment and embodiment 1 is that the image side S11 of the sixth lens L6 is a concave surface, and the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0140] The related parameters of each lens in the optical lens of embodiment 3 are shown in Table 3-1.

[0141] Table 3-1

[0142]

[0143]

[0144] The surface type parameters of the aspherical lens of the optical lens of embodiment 3 are shown in Table 3-2.

[0145] Table 3-2

[0146] Surface Number K A B C D E F S3 -2.11E+00 0.00E+00 9.57E-05 1.46E-06 -2.41E-07 8.31E-09 -1.02E-10 S4 9.52E+00 0.00E+00 8.52E-04 1.02E-05 -3.65E-07 2.35E-08 -5.32E-10 S7 -1.71E+00 0.00E+00 -1.62E-05 -1.13E-05 -5.37E-06 8.33E-07 -6.26E-08 S8 5.18E-01 0.00E+00 -7.80E-05 1.21E-04 -1.28E-05 7.29E-07 -2.42E-08 S12 -2.83E+00 0.00E+00 3.37E-04 2.69E-05 -1.60E-06 4.90E-08 -2.70E-09 S13 -8.55E+00 0.00E+00 -1.71E-04 1.10E-05 2.32E-06 -2.00E-07 1.77E-09

[0147] In the present embodiment, the field curvature curve, the F-Theta distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the sagittal chromatic aberration curve of the optical lens are shown in FIGS. Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21

[0148] Figure 16 ​The field curvature curve of embodiment 3 is shown, which represents the bending 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, which shows that the optical lens can well correct the field curvature.

[0149] Figure 17 The F-Theta distortion curve of embodiment 3 is shown, which represents the F-Theta distortion of light rays of different wavelengths at different image heights on the imaging surface, the horizontal axis represents the F-Theta distortion value (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -20%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0150] Figure 18 The relative luminance curve of embodiment 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 85% at the maximum half field angle, which shows that the optical lens has good relative luminance.

[0151] Figure 19 The MTF (Modulation Transfer Function) curve of embodiment 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 embodiment is above 0.45 within the full field of view, and within the range of 0-160 lp / 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.

[0152] Figure 20 The axial aberration curve of embodiment 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 -2μm~10μm, which shows that the optical lens can well correct the axial aberration.

[0153] 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 plane 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 of view. As can be seen from the figure, the vertical color aberration of the longest wavelength and the shortest wavelength is controlled within -1 μm ~ 2 μm, which shows that the optical lens can well correct the color aberration of the edge field of view and the secondary spectrum of the entire image plane.

[0154] Embodiment 4

[0155] Referring to Figure 22 , a structure schematic diagram of the optical lens provided in embodiment 4 of the present application is shown, and the difference between the present embodiment and embodiment 1 is that the image side S11 of the sixth lens L6 is a concave surface, and the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0156] The related parameters of each lens in the optical lens in embodiment 4 are shown in Table 4-1.

[0157] Table 4-1

[0158]

[0159]

[0160] The surface type parameters of the aspherical lens of the optical lens in embodiment 4 are shown in Table 4-2.

[0161] Table 4-2

[0162] Surface Number K A B C D E F S3 -2.13E+00 0.00E+00 1.00E-04 1.52E-06 -2.27E-07 8.15E-09 -1.06E-10 S4 1.96E+01 0.00E+00 9.08E-04 1.17E-05 -7.27E-08 1.58E-08 1.77E-10 S7 -1.88E+00 0.00E+00 -5.27E-05 -1.17E-05 -6.09E-06 8.03E-07 -6.53E-08 S8 5.60E-01 0.00E+00 -5.32E-05 1.24E-04 -1.42E-05 8.26E-07 -2.88E-08 S12 -2.53E+00 0.00E+00 5.06E-04 3.11E-05 -1.94E-06 8.53E-08 -5.06E-09 S13 -6.96E+00 0.00E+00 -6.14E-05 1.87E-05 2.72E-06 -2.35E-07 -3.33E-10

[0163] In the present embodiment, the field curvature curve, the F-Theta distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the vertical color aberration curve of the optical lens are shown in Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28 respectively.

[0164] Figure 23 The field curvature curve of embodiment 4 is shown, which represents the bending degree of light rays of different wavelengths on the meridional image plane and the sagittal image plane, the horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the field curvature of the meridional image plane and the sagittal image plane is controlled within ±0.02 mm, which shows that the optical lens can well correct the field curvature.

[0165] Figure 24F-Theta distortion curve of embodiment 4 is shown, which represents F-Theta distortion of light rays of different wavelengths at different image heights on the imaging plane, the horizontal axis represents F-Theta distortion value (unit: %), and the vertical axis represents half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -20%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0166] Figure 25 Relative illumination curve of embodiment 4 is shown, which represents relative illumination values of different field angles on the imaging plane, the horizontal axis represents half field angle (unit: °), and the vertical axis represents relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 90% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0167] Figure 26 The MTF (Modulation Transfer Function) curve of embodiment 4 is shown, which represents the imaging modulation degree of the lens at different spatial frequencies under each field of view, the horizontal axis represents spatial frequency (unit: lp / mm), and the vertical axis represents MTF value. As can be seen from the figure, the MTF value of the embodiment is above 0.45 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 conditions.

[0168] Figure 27 The axial aberration curve of embodiment 4 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents axial aberration value (unit: μm), and the vertical axis represents normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -3μm~18μm, which indicates that the optical lens can better correct the axial aberration.

[0169] Figure 28 The axial aberration curve of embodiment 4 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents axial aberration value (unit: μm), and the vertical axis represents normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -3μm~18μm, which indicates that the optical lens can better correct the axial aberration.

[0170] Embodiment 5

[0171] Please refer to Figure 29Figure 5 shows a structural schematic diagram of an optical lens provided in Embodiment 5 of the present application. Compared with Embodiment 1, the main difference is that the radius of curvature, lens thickness and other optical parameters of the lens surface are different.

[0172] The related parameters of the lenses in the optical lens in Embodiment 5 are shown in Table 5-1.

[0173] Table 5-1

[0174]

[0175]

[0176] The surface type parameters of the aspherical lens of the optical lens in Embodiment 5 are shown in Table 5-2.

[0177] Table 5-2

[0178] Surface Number K A B C D E F S3 -3.12E+00 0.00E+00 1.27E-04 2.57E-07 -2.13E-07 1.10E-08 -1.83E-10 S4 1.19E+01 0.00E+00 9.92E-04 2.19E-06 2.25E-06 -1.82E-07 8.93E-09 S7 -2.68E+00 0.00E+00 -1.96E-04 3.56E-07 -6.74E-06 1.96E-07 -2.00E-08 S8 8.98E-01 0.00E+00 -9.87E-05 1.26E-04 -1.09E-05 6.64E-07 -1.83E-08 S12 -1.81E+00 0.00E+00 2.12E-04 2.11E-05 -1.03E-06 3.50E-08 -7.70E-10 S13 -2.47E+00 0.00E+00 3.64E-04 7.98E-06 7.45E-07 -8.17E-10 -1.90E-09

[0179] In this embodiment, the field curvature curve, F-Theta distortion curve, relative illumination curve, MTF curve, axial aberration curve and transverse chromatic aberration curve of the optical lens are shown in Figures Figure 30 、 Figure 31 、 Figure 32 、 Figure 33 、 Figure 34 、 Figure 35 .

[0180] Figure 30 Figure 5 shows the field curvature curve of Embodiment 5, which represents the curvature of the meridional image surface and sagittal image surface of light rays of different wavelengths, and 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 sagittal image surface is controlled within -0.04mm-0.02mm, which indicates that the optical lens can well correct the field curvature.

[0181] Figure 31 Figure 5 shows the F-Theta distortion curve of Embodiment 5, which represents the F-Theta distortion of light rays of different wavelengths at different image heights on the imaging surface, and the horizontal axis represents the F-Theta distortion value (unit: %) and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -20%-0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0182] Figure 32The relative luminance curve of the embodiment 5 is shown, which represents the relative luminance values of different field angles on the imaging plane, 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 90% at the maximum half field angle, which shows that the optical lens has good relative luminance.

[0183] Figure 33 The MTF (modulation transfer function) curve of the embodiment 5 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 ability in the case of low frequency and high frequency.

[0184] Figure 34 The axial aberration curve of the embodiment 5 is shown, which represents the axial 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-15 μm-9 μm, which shows that the optical lens can better correct the axial aberration.

[0185] Figure 35 The axial aberration curve of the embodiment 5 is shown, which represents the axial 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-15 μm-9 μm, which shows that the optical lens can better correct the axial aberration.

[0186] Embodiment 6

[0187] Please refer to Figure 36 , which is a structural schematic diagram of the optical lens provided in the embodiment 6 of the present application. Compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0188] The related parameters of each lens in the optical lens in the embodiment 6 are shown in Table 6-1.

[0189] Table 6-1

[0190]

[0191] The surface type parameters of the aspheric lens of the optical lens in the embodiment 6 are shown in Table 6-2.

[0192] Table 6-2

[0193] Surface Number K A B C D E F S3 -1.89E+00 0.00E+00 1.08E-04 2.92E-06 -1.87E-07 6.28E-09 -9.69E-11 S4 7.46E+00 0.00E+00 6.77E-04 3.73E-06 2.30E-06 -1.70E-07 7.18E-09 S7 -2.14E+00 0.00E+00 -3.96E-05 7.43E-06 -5.13E-06 2.46E-07 -1.61E-08 S8 8.02E-01 0.00E+00 -1.29E-04 1.13E-04 -9.52E-06 5.49E-07 -1.78E-08 S12 -1.85E+00 0.00E+00 1.91E-04 1.92E-05 -8.49E-07 2.50E-08 -4.96E-10 S13 -2.86E+00 0.00E+00 3.66E-04 5.21E-06 8.22E-07 -2.45E-08 -6.90E-10

[0194] In this embodiment, the field curvature curve, F-Theta distortion curve, relative illumination curve, MTF curve, axial aberration curve, and transverse aberration curve of the optical lens are shown in FIGS. 6-1 to 6-6, respectively. Figure 37 、 Figure 38 、 Figure 39 、 Figure 40 、 Figure 41 、 Figure 42

[0195] Figure 37 The field curvature curve of Example 6 is shown, which represents the curvature 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: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within -0.04 mm to 0.02 mm, which indicates that the optical lens can well correct the field curvature.

[0196] Figure 38 The F-Theta distortion curve of Example 6 is shown, which represents the F-Theta distortion of light rays of different wavelengths at different image heights on the imaging surface, the horizontal axis represents the F-Theta distortion value (unit: %), and the vertical axis represents the half field angle (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within -20% to 0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0197] Figure 39 The relative illumination curve of Example 6 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 90% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0198] Figure 40 The MTF (Modulation Transfer Function) curve of Example 6 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 this embodiment is above 0.4 within the full field of view, and within the range of 0-160 lp / 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.

[0199] Figure 41 ​The axial aberration curve of the embodiment 6 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 -3 μm ~ 12 μm, which shows that the optical lens can correct the axial aberration well.

[0200] Figure 42 The curve of the embodiment 6 is shown, which represents the color aberration of each wavelength at different image heights on the imaging plane relative to the central wavelength (0.55 μm), the horizontal axis represents the 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 color aberration of the longest wavelength and the shortest wavelength is controlled within -1 μm ~ 2 μm, which shows that the optical lens can correct the color aberration of the edge field and the secondary spectrum of the whole image plane very well.

[0201] Referring to Table 7, the optical properties of the above-mentioned embodiments are shown, including the effective focal length f, the total optical length TTL, the aperture value FNO, the real image height IH, the chief ray angle CRA and the maximum field angle FOV of the optical lens, and the numerical values corresponding to each conditional expression in each embodiment.

[0202] Table 7

[0203] Parameter and Condition Formula Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 f (mm) 3.79 3.79 3.17 2.92 3.29 3.47 FOV (°) 195.00 195.00 195.00 195.00 200.00 200.00 EPD (mm) 1.72 1.72 1.63 1.58 1.83 1.83 TTL (mm) 36.19 36.19 36.61 35.82 32.40 34.01 FNO 2.20 2.20 1.95 1.85 1.80 1.90 IH (mm) 10.50 10.50 9.00 8.06 9.60 10.00 CRA (°) 18.00 18.00 19.98 19.28 20.02 19.94 BFL (mm) 4.93 4.31 3.90 3.55 3.22 3.56 TTL / f 9.55 9.55 11.54 12.26 9.84 9.80 (IH / 2) / (f x θ) 0.81 0.81 0.83 0.81 0.83 0.83 FOV / FNO (°) 88.64 88.64 100.00 105.41 111.11 105.26 BFL / f 1.30 1.14 1.23 1.22 0.98 1.02 f1 / f -2.34 -2.34 -2.61 -2.95 -2.39 -2.32 f2 / f -2.15 -2.15 -2.60 -2.79 -2.57 -2.51 f3 / f 2.43 2.43 2.59 2.81 2.59 2.51 f4 / f 2.12 2.12 2.47 2.62 2.30 2.21 f5 / f -1.23 -1.23 -1.29 -1.44 -1.32 -1.23 f6 / f 2.33 2.33 2.65 2.98 2.41 2.28 f7 / f 5.07 5.07 4.87 5.02 5.61 5.55 (R3-R4) / (R3+R4) -2.57 -1.84 -1.82 -1.71 -2.74 -2.82 ∑CT / TTL 0.65 0.65 0.65 0.68 0.67 0.68 CT2 / f 1.27 1.32 2.05 2.40 1.22 1.36

[0204] In summary of the above embodiments, the optical lens provided by the present application improves the imaging quality of the optical lens, reduces the aberration, and improves the imaging quality of the optical lens by reasonable configuration of each lens surface and reasonable matching of the optical power.

[0205] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction 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.

[0206] The above-described embodiments only express several embodiments of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the scope of the present patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the present patent 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, the optical lens comprises 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 and image side surface are both concave surfaces; a third lens with positive refractive power, whose object side surface and image side surface are both convex surfaces; a fourth lens with positive refractive power, whose object side surface and image side surface are both convex surfaces; a fifth lens with negative refractive power, whose object side surface and image side surface are both concave surfaces; a sixth lens with positive refractive power, whose object side surface is a convex surface; a seventh lens with positive refractive power, whose object side surface is a convex surface and whose image side surface is a concave surface; a radius of curvature R3 of the object side surface of the second lens and a radius of curvature R4 of the image side surface of the second lens satisfy: -5.0 < (R3-R4) / (R3+R4) < -1.5; a central thickness CT2 of the second lens along the optical axis and an effective focal length f of the optical lens satisfy: 1.0 < CT2 / f < 3.

0.

2. The optical lens of claim 1, wherein, a sum ∑CT of the central thicknesses of the first lens to the seventh lens along the optical axis and a total track length TTL of the optical lens satisfy: 0.6 < ∑CT / TTL < 0.

7.

3. The optical lens of claim 1, wherein, an effective focal length f of the optical lens and a focal length f7 of the seventh lens satisfy: 4.5 < f7 / f < 6.

0.

4. The optical lens of claim 1, wherein, an effective focal length f of the optical lens and a total track length TTL of the optical lens satisfy: 9.0 < TTL / f < 13.

0.

5. The optical lens of claim 1, wherein, an effective focal length f of the optical lens, an arc θ of a maximum half field of view and a real image height IH corresponding to a maximum field of view satisfy: 0.8 < (IH / 2) / (f×θ) < 0.

85.

6. The optical lens of claim 1, wherein, a maximum field of view FOV of the optical lens and an aperture value FNO satisfy: 80° < FOV / FNO < 115°.

7. The optical lens of claim 1, wherein, an effective focal length f of the optical lens and an optical back focal length BFL satisfy: 0.95 < BFL / f < 1.

4.

8. 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: -3.0 < f1 / f < -2.

0.

9. 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: -3.0 < f2 / f < -2.

0.

10. 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 < f3 / f < 3.0.

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