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 seven lenses are: a first lens with negative optical power, the object side surface of which is a convex surface and the image side surface of which is a concave surface; a second lens with optical power, the object side surface of which is a concave surface and the image side surface of which is a convex surface; a third lens with negative optical power, the object side surface of which is a concave surface; a fourth lens with positive optical power, the object side surface and the image side surface of which are both convex surfaces; a diaphragm; a fifth lens with negative optical power, the object side surface and the image side surface of which are both concave surfaces; a sixth lens with positive optical power, the object side surface and the image side surface of which are both convex surfaces; and a seventh lens with positive optical power, wherein a real image height IH corresponding to a maximum field angle of the optical lens and an entrance pupil diameter EPD satisfy 2.0<IH / EPD<3.3. 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 through reasonable configuration of the surface shapes of the lenses and reasonable matching of the optical powers.

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. 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 be able 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, 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 optical power, the object side surface is convex, and the image side surface is concave;

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

[0008] The third lens with negative optical power, the object side surface is concave;

[0009] The fourth lens with positive optical power, the object side surface and the image side surface are both convex;

[0010] The diaphragm;

[0011] The fifth lens with negative optical power, the object side surface and the image side surface are both concave;

[0012] The sixth lens with positive optical power, the object side surface and the image side surface are both convex;

[0013] The seventh lens with positive optical power;

[0014] The real image height IH corresponding to the maximum field angle of the optical lens and the entrance pupil diameter EPD satisfy: 2.0<IH / EPD<3.3.

[0015] Further preferably, the entrance pupil diameter EPD of the optical lens satisfies: 2.5<EPD<4.0.

[0016] Further preferably, the total track length TTL of the optical lens and the effective focal length f satisfy: 3.5 < TTL / f < 7.0.

[0017] Further preferably, the effective focal length f of the optical lens, the maximum field angle FOV and the real image height IH corresponding to the maximum field angle satisfy: 0.7 < (IH / 2) / (f x tan(FOV / 2)) < 1.0.

[0018] Further preferably, the maximum field angle FOV of the optical lens and the aperture value FNO satisfy: 25° < FOV / FNO < 50°.

[0019] Further preferably, the maximum field angle FOV of the optical lens, the real image height IH corresponding to the maximum field angle and the clear aperture D1 of the first lens object side satisfy: 1.5 < D1 / IH / tan(FOV / 2) < 2.8.

[0020] Further preferably, 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.

[0021] Further preferably, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: -1.5 < f5 / f < -0.5.

[0022] Further preferably, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: 5.0 < f7 / f < 7.5.

[0023] Further preferably, the effective focal length f of the optical lens and the combined focal length f 14 of the first lens to the fourth lens satisfy: 0.7 < f 14 / f < 0.9; and the effective focal length f of the optical lens and the combined focal length f 57 of the fifth lens to the seventh lens satisfy: 5.0 < f 57 / f < 88.0.

[0024] 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

[0025] 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:

[0026] Figure 1 FIG. 1 is a structure schematic diagram of an optical lens according to an embodiment of the present application. Figure 2The field curvature curve of the optical lens in Embodiment 1 of the present application. Figure 3 The F-Tanθ distortion curve of the optical lens in Embodiment 1 of the present application. Figure 4 The MTF curve of the optical lens in Embodiment 1 of the present application. Figure 5 The axial aberration curve of the optical lens in Embodiment 1 of the present application. Figure 6 The axial aberration curve of the optical lens in Embodiment 1 of the present application.

[0027] Figure 7 The structure diagram of the optical lens in Embodiment 2 of the present application. Figure 8 The field curvature curve of the optical lens in Embodiment 2 of the present application. Figure 9 The F-Tanθ distortion curve of the optical lens in Embodiment 2 of the present application. Figure 10 The MTF curve of the optical lens in Embodiment 2 of the present application. Figure 11 The axial aberration curve of the optical lens in Embodiment 2 of the present application. Figure 12 The axial aberration curve of the optical lens in Embodiment 2 of the present application.

[0028] Figure 13 The structure diagram of the optical lens in Embodiment 3 of the present application. Figure 14 The field curvature curve of the optical lens in Embodiment 3 of the present application. Figure 15 The F-Tanθ distortion curve of the optical lens in Embodiment 3 of the present application. Figure 16 The MTF curve of the optical lens in Embodiment 3 of the present application. Figure 17 The axial aberration curve of the optical lens in Embodiment 3 of the present application. Figure 18 The axial aberration curve of the optical lens in Embodiment 3 of the present application.

[0029] Figure 19 The structure diagram of the optical lens in Embodiment 4 of the present application. Figure 20 The field curvature curve of the optical lens in Embodiment 4 of the present application. Figure 21 The F-Tanθ distortion curve of the optical lens in Embodiment 4 of the present application. Figure 22 The MTF curve of the optical lens in Embodiment 4 of the present application. Figure 23 The axial aberration curve of the optical lens in Embodiment 4 of the present application. Figure 24 The axial aberration curve of the optical lens in Embodiment 4 of the present application.

[0030] Figure 25 The structure diagram of the optical lens in Embodiment 5 of the present application. Figure 26 The field curvature curve of the optical lens in Embodiment 5 of the present application. Figure 27 The F-Tanθ distortion curve of the optical lens in Embodiment 5 of the present application.Figure 28 is a MTF curve of the optical lens in embodiment 5 of the present application. Figure 29 is an axial aberration curve of the optical lens in embodiment 5 of the present application. Figure 30 is a lateral chromatic aberration curve of the optical lens in embodiment 5 of the present application.

[0031] Figure 31 is a structure diagram of the optical lens in embodiment 6 of the present application. Figure 32 is a curve of the field curvature of the optical lens in embodiment 6 of the present application. Figure 33 is a F-Tanθ distortion curve of the optical lens in embodiment 6 of the present application. Figure 34 is a MTF curve of the optical lens in embodiment 6 of the present application. Figure 35 is an axial aberration curve of the optical lens in embodiment 6 of the present application. Figure 36 is a lateral chromatic aberration curve of the optical lens in embodiment 6 of the present application.

[0032] Figure 37 is a structure diagram of the optical lens in embodiment 7 of the present application. Figure 38 is a curve of the field curvature of the optical lens in embodiment 7 of the present application. Figure 39 is a F-Tanθ distortion curve of the optical lens in embodiment 7 of the present application. Figure 40 is a MTF curve of the optical lens in embodiment 7 of the present application. Figure 41 is an axial aberration curve of the optical lens in embodiment 7 of the present application. Figure 42 is a lateral chromatic aberration curve of the optical lens in embodiment 7 of the present application.

[0033] Figure 43 is a structure diagram of the optical lens in embodiment 8 of the present application. Figure 44 is a curve of the field curvature of the optical lens in embodiment 8 of the present application. Figure 45 is a F-Tanθ distortion curve of the optical lens in embodiment 8 of the present application. Figure 46 is a MTF curve of the optical lens in embodiment 8 of the present application. Figure 47 is an axial aberration curve of the optical lens in embodiment 8 of the present application. Figure 48 is a lateral chromatic aberration curve of the optical lens in embodiment 8 of the present application.

[0034] Figure 49 is a structure diagram of the optical lens in embodiment 9 of the present application. Figure 50 is a curve of the field curvature of the optical lens in embodiment 9 of the present application. Figure 51 is a F-Tanθ distortion curve of the optical lens in embodiment 9 of the present application. Figure 52 is a MTF curve of the optical lens in embodiment 9 of the present application. Figure 53Axial aberration curve of the optical lens in Embodiment 9 of the present application. Figure 54 Vignetting curve of the optical lens in Embodiment 9 of the present application.

[0035] Figure 55 Structure diagram of the optical lens in Embodiment 10 of the present application. Figure 56 Curvature of field curve of the optical lens in Embodiment 10 of the present application. Figure 57 F-Tanθ distortion curve of the optical lens in Embodiment 10 of the present application. Figure 58 MTF curve of the optical lens in Embodiment 10 of the present application. Figure 59 Axial aberration curve of the optical lens in Embodiment 10 of the present application. Figure 60 Vignetting curve of the optical lens in Embodiment 10 of the present application.

[0036] The following detailed description will further describe the present application with reference to the above-mentioned drawings. DETAILED DESCRIPTION

[0037] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that the expressions first, second, third, etc. in the present specification are merely used to distinguish one feature from another feature, and do not represent 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.

[0039] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0040] In this context, 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.

[0041] It should also be understood that the words "comprise," "comprising," "include," "including," and / or "has," "having," 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. Furthermore, when describing the embodiments of the present application, the word "may" is used to mean "one or more embodiments of the present application." Also, the word "example" is used to mean "serving as an example, instance, or illustration."

[0042] 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 overly literal or overly formal sense unless expressly so defined herein.

[0043] 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.

[0044] 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 fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, a filter and a protective glass.

[0045] In some embodiments, the first lens can have a negative refractive 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 surface is convex, and the image side surface 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.

[0046] In some embodiments, the second lens can have a positive refractive power, and the object side surface is concave, and the image side surface is convex, which is conducive to balancing the off-axis aberration caused by the first lens and improving the imaging quality of the optical lens. The second lens can also have a negative refractive power, and the object side surface is concave, and the image side surface is convex, which can share the negative refractive power of the front end of the lens, thereby reducing the excessive deflection of the light 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.

[0047] In some embodiments, the third lens can have a negative refractive power, and the object side surface is concave, which is conducive to reducing the light deflection angle and making the light trend smooth and transition, and is conducive to balancing the spherical aberration caused by the front end lens and improving the imaging quality of the optical lens.

[0048] In some embodiments, the fourth lens has positive refractive power, which is beneficial to improve the light converging capability of the optical lens, and both the object side surface and the image side surface of the fourth lens are convex, which is beneficial to balance various aberrations generated by the optical lens and improve the imaging quality of the optical lens.

[0049] In some embodiments, the fifth lens has negative refractive power, which is beneficial to increase the imaging area of the optical lens and improve the imaging quality of the optical lens. Both the object side surface and the image side surface of the fifth lens are concave, which can optimize the chromatic aberration of the optical lens and improve the imaging quality of the optical lens.

[0050] In some embodiments, the sixth lens has positive refractive power, which is beneficial to improve the light converging capability of the optical lens, and both the object side surface and the image side surface of the sixth lens are convex, which is beneficial to balance various aberrations generated by the optical lens and improve the imaging quality of the optical lens.

[0051] In some embodiments, the seventh lens has 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.

[0052] In some embodiments, the real image height IH corresponding to the maximum field of view angle of the optical lens and the entrance pupil diameter EPD satisfy: 2.0<IH / EPD<3.3. Satisfying the above range can increase the width of the light beam incident on the optical lens, so that the brightness of the optical lens at the image surface is improved to avoid dark corners.

[0053] In some embodiments, the entrance pupil diameter EPD of the optical lens satisfies: 2.5<EPD<4.0. Satisfying the above range can provide more incident light for the optical lens, so as to obtain sufficient scene information.

[0054] In some embodiments, the total optical length TTL of the optical lens and the effective focal length f satisfy: 3.5<TTL / f<7.0. Satisfying the above requirement ensures that there is enough space to adjust the lens structure and optimize the imaging effect.

[0055] In some embodiments, the effective focal length f of the optical lens, the maximum field of view angle FOV, and the real image height IH corresponding to the maximum field of view angle satisfy: 0.7<(IH / 2) / (fxtan(FOV / 2))<1.0. Satisfying the above requirement indicates that the optical distortion of the optical lens is well controlled, and the resolving power of the optical lens is improved.

[0056] In some embodiments, the maximum field of view FOV of the optical lens and the aperture value FNO satisfy: 25° < FOV / FNO < 50°. Satisfying the above range is conducive to expanding the field of view of the optical lens and increasing the aperture of the optical lens, which is conducive to the optical lens to obtain more scene information, meet the needs of large range detection, and the implementation of large aperture characteristics is conducive to improving the problem that the relative brightness of the edge field of view decreases rapidly, thereby also conducive to obtaining more scene information.

[0057] In some embodiments, the maximum field of view FOV of the optical lens and the maximum field of view corresponding to the real image height IH and the light passing aperture D1 of the first lens satisfy: 1.5 < 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 and large image surface.

[0058] 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. Satisfying the above requirement can make the first lens have appropriate negative refractive power, which is conducive to reducing the inclination angle of the incident light, thereby reducing the correction difficulty of various aberrations of the optical lens.

[0059] In some embodiments, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: |f2 / f| > 18. Satisfying the above requirement, the second lens adopts a larger focal length, which can reduce the deflection angle of the incident light while sharing the deflection of the incident light by the front end lens.

[0060] In some embodiments, the effective focal length f of the optical lens and the focal length f3 of the third lens satisfy: -5.0 < f3 / f < -2.0. Satisfying the above requirement can make the third lens have appropriate negative refractive power, share the negative refractive power of the front end of the optical lens, thereby avoiding excessive deflection of light caused by the first lens having too concentrated refractive power, and reducing the difficulty of chromatic aberration correction of the optical lens.

[0061] In some embodiments, the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: 0.5 < f4 / f < 1.5. Satisfying the above requirement can make the fourth lens have appropriate positive refractive power, converge light while reducing the deflection angle of the light, make the light trend smooth transition, balance various aberrations generated by the optical lens, and improve the imaging quality of the optical lens.

[0062] In some embodiments, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: -1.5 < f5 / f < -0.5. Satisfying the above requirement can make the fifth lens have appropriate negative refractive power, which can increase 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.

[0063] In some embodiments, the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy: 0.5 < f6 / f < 1.5. Meeting the above requirements can endow the sixth lens with an appropriate positive optical power, reduce the light deflection angle while converging the light, enable the light to transition smoothly, and balance various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0064] In some embodiments, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: 5.0 < f7 / f < 7.5. Meeting the above requirements can endow the seventh lens with an appropriate positive optical power, which is beneficial to suppressing the angle of incidence of the marginal field of view on the imaging surface, effectively transmitting more light beams to the imaging surface, and improving the imaging quality of the optical lens; at the same time, it also optimizes the spherical aberration of the optical lens and improves the imaging quality of the optical lens.

[0065] In some embodiments, the effective focal length f of the optical lens and the combined focal length f of the first lens to the fourth lens 14 satisfy: 0.7 < f 14 / f < 0.9; meeting the above requirements, by reasonably distributing the optical power of the first lens to the fourth lens, it is beneficial to reduce the front aperture of the lens and improve the correction ability of various aberrations at the front end of the optical lens. The effective focal length f of the optical lens and the combined focal length f of the fifth lens to the seventh lens 57 satisfy: 5.0 < f 57 / f < 88.0. Meeting the above requirements, by reasonably distributing the optical power of the fifth lens to the seventh lens, the focal length of the optical lens is balanced, which is beneficial to the smooth light trend and compresses the CRA of the marginal field of view outgoing light.

[0066] In some embodiments, the Abbe number Vd of at least one of the fifth lens and the sixth lens satisfies: Vd > 80, and the Abbe number Vd5 of the fifth lens and the Abbe number Vd6 of the sixth lens satisfy: Vd6 - Vd5 > 60. Meeting the above range is beneficial to achieving confocal of visible light and infrared light.

[0067] In some embodiments, the fifth lens and the sixth lens can be glued together to form a cemented lens, which can effectively correct the chromatic aberration of the optical lens, reduce the eccentricity sensitivity of the optical lens, balance the aberration of the optical lens, and improve the imaging quality of the optical lens; it can also reduce the assembly sensitivity of the optical lens, thereby reducing the processing difficulty of the optical lens and improving the assembly yield of the optical lens.

[0068] In some embodiments, the second lens, the fourth lens, and the seventh lens can all adopt the aspherical lens surface type to improve the resolution quality.

[0069] In order to make the system have better optical performance, a plurality of aspheric lenses are used in the lens, and each aspheric surface shape of the optical lens satisfies the following equation:

[0070]

[0071] 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 curved surface coefficient, A, B, C, D, E and F are respectively the second-order, fourth-order, sixth-order, eighth-order, tenth-order and twelfth-order curved surface coefficients.

[0072] The application will be further described in the following embodiments. In each embodiment, the thickness, the radius of curvature and 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, and any change, replacement, combination or simplification made without departing from the innovative points of the application should be regarded as equivalent replacement mode, and all are included in the protection scope of the application.

[0073] Embodiment 1

[0074] Please refer to Figure 1 , which is a structural schematic diagram of the optical lens provided in the embodiment 1 of the application, and the optical lens comprises in sequence from the object side to the imaging surface along the optical axis: the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the diaphragm ST, the fifth lens L5, the sixth lens L6, the seventh lens L7, the filter G1 and the protective glass G2.

[0075] The first lens L1 has negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface;

[0076] The second lens L2 has negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface;

[0077] The third lens L3 has negative focal power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface;

[0078] The fourth lens L4 has positive focal power, and the object side surface S7 and the image side surface S8 are both convex surfaces;

[0079] The diaphragm ST;

[0080] The fifth lens L5 has negative focal power, and the object side surface S9 and the image side surface S10 are both concave surfaces;

[0081] The sixth lens L6 has positive focal power, and the object side surface S10 and the image side surface S11 are both convex surfaces;

[0082] 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;

[0083] The seventh lens L7 has positive refractive power, and both the object side surface S12 and the image side surface S13 are convex surfaces;

[0084] The object side surface S14 and the image side surface S15 of the filter G1 are both planar surfaces;

[0085] The object side surface S16 and the image side surface S17 of the protective glass G2 are both planar surfaces;

[0086] The imaging surface S18 is a planar surface.

[0087] The related parameters of the lenses in the optical lens in Embodiment 1 are shown in Table 1-1.

[0088] Table 1-1

[0089]

[0090]

[0091] The surface type parameters of the aspherical lenses of the optical lens in Embodiment 1 are shown in Table 1-2.

[0092] Table 1-2

[0093] Face number K A B C D E F S3 -1.09E+00 0.00E+00 5.32E-04 -1.85E-07 1.48E-07 -1.30E-08 5.40E-10 S4 -2.30E+00 0.00E+00 -8.30E-05 9.31E-06 3.08E-08 -5.51E-09 3.38E-10 S7 -8.21E-01 0.00E+00 2.28E-04 5.83E-06 1.10E-07 8.93E-09 9.40E-11 S8 -1.93E+01 0.00E+00 1.78E-04 3.40E-05 1.48E-07 -6.72E-08 7.99E-09 S12 -6.45E+00 0.00E+00 -3.34E-04 2.29E-05 3.06E-06 -3.61E-08 1.56E-09 S13 4.47E+01 0.00E+00 -6.88E-04 2.29E-05 8.25E-07 1.45E-08 3.52E-09

[0094] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6

[0095] Figure 2 The field curvature curve of Embodiment 1 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-0.03mm-0.06mm, which shows that the optical lens can well correct the field curvature.

[0096] Figure 3 ​The F-Tanθ distortion curve of the embodiment 1 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging plane, 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 -22%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0097] Figure 4 The MTF (Modulation Transfer Function) curve of the embodiment 1 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.

[0098] Figure 5 The axial aberration curve of the embodiment 1 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 -10 μm~15 μm, which indicates that the optical lens can better correct the axial aberration.

[0099] Figure 6 The sagittal chromatic aberration curve of the embodiment 1 is shown, which represents the chromatic aberration of each wavelength at different image heights on the imaging plane relative to the center wavelength (0.55 μm), the horizontal axis represents the sagittal chromatic aberration value of each wavelength relative to the center 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 -2 μm~6 μm, which indicates that the optical lens can very well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.

[0100] Embodiment 2

[0101] Please refer to Figure 7 , which is a structural schematic diagram of the optical lens provided in the embodiment 2 of the present application, and the optical lens sequentially 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 fourth lens L4, a diaphragm ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0102] 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;

[0103] The second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex;

[0104] The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both concave;

[0105] The fourth lens L4 has positive refractive power, the object side S7 and the image side S8 are both convex;

[0106] The stop ST;

[0107] The fifth lens L5 has negative refractive power, the object side S9 and the image side S10 are both concave;

[0108] The sixth lens L6 has negative refractive power, the object side S10 and the image side S11 are both convex;

[0109] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface S10 of the image side of the fifth lens L5 and the object side of the sixth lens L6;

[0110] The seventh lens L7 has positive refractive power, the object side S12 and the image side S13 are both convex;

[0111] The object side S14 and the image side S15 of the filter G1 are both flat;

[0112] The object side S16 and the image side S17 of the protective glass G2 are both flat;

[0113] The imaging surface S18 is flat.

[0114] The related parameters of the lenses in the optical lens in Embodiment 2 are shown in Table 2-1.

[0115] Table 2-1

[0116]

[0117]

[0118] The surface type parameters of the aspherical lens of the optical lens in Embodiment 2 are shown in Table 2-2.

[0119] Table 2-2

[0120] Face number K A B C D E F S3 -1.41E+00 0.00E+00 5.15E-04 4.62E-07 1.43E-07 -1.49E-08 4.05E-10 S4 -2.51E+00 0.00E+00 -2.78E-05 1.11E-05 1.98E-08 -6.05E-09 2.21E-10 S7 -8.95E-01 0.00E+00 2.06E-04 5.32E-06 1.51E-07 1.10E-08 -1.77E-11 S8 -1.67E+01 0.00E+00 1.37E-04 3.57E-05 2.46E-07 -5.51E-08 5.88E-09 S12 -2.95E+00 0.00E+00 -2.73E-04 1.42E-05 4.31E-06 -4.90E-08 2.08E-09 S13 -6.02E+00 0.00E+00 -7.03E-04 2.62E-05 8.32E-07 2.50E-08 6.02E-09

[0121] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 respectively.

[0122] Figure 8 The field curvature curve of Example 2 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 -0.05mm~0.08mm, which shows that the optical lens can well correct the field curvature.

[0123] Figure 9 The F-Tanθ distortion curve of Example 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 -22%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0124] Figure 10 The MTF (Modulation Transfer Function) curve of Example 2 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 field of view, and has good imaging quality and good detail resolution ability in low frequency and high frequency conditions.

[0125] Figure 11 The axial aberration curve of Example 2 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 -10μm~15μm, which shows that the optical lens can well correct the axial aberration.

[0126] Figure 12 The axial aberration curve of Example 2 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 -10μm~15μm, which shows that the optical lens can well correct the axial aberration.

[0127] Example 3

[0128] Please refer to Figure 13Figure 3 shows a structural schematic diagram of an optical lens provided in Embodiment 3 of the present application, which comprises, along an optical axis from an object side to an imaging surface, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0129] The first lens L1 has a negative focal power, and its object side S1 is a convex surface and its image side S2 is a concave surface.

[0130] The second lens L2 has a negative focal power, and its object side S3 is a concave surface and its image side S4 is a convex surface.

[0131] The third lens L3 has a negative focal power, and its object side S5 is a concave surface and its image side S6 is a convex surface.

[0132] The fourth lens L4 has a positive focal power, and both its object side S7 and its image side S8 are convex surfaces.

[0133] The stop ST.

[0134] The fifth lens L5 has a negative focal power, and both its object side S9 and its image side S10 are concave surfaces.

[0135] The sixth lens L6 has a positive focal power, and both its object side S10 and its image side S11 are convex surfaces.

[0136] 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.

[0137] The seventh lens L7 has a positive focal power, and its object side S12 is a convex surface and its image side S13 is a concave surface.

[0138] The object side S14 and the image side S15 of the filter G1 are both flat surfaces.

[0139] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces.

[0140] The imaging surface S18 is a flat surface.

[0141] The related parameters of the lenses in the optical lens in Embodiment 3 are shown in Table 3-1.

[0142] Table 3-1

[0143]

[0144] The surface type parameters of the aspheric lenses in the optical lens in Embodiment 3 are shown in Table 3-2.

[0145] Table 3-2

[0146]

[0147]

[0148] In the present embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve and the lateral aberration curve of the optical lens are shown in FIGS. 6-10 respectively. Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 、 Figure 18

[0149] Figure 14 The field curvature curve of Example 3 is shown, which represents the curvature of the meridional image surface and the sagittal image surface of light rays of different wavelengths, 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 -0.04mm~0.03mm, which shows that the optical lens can well correct the field curvature.

[0150] Figure 15 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 -7%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0151] Figure 16 The MTF (Modulation Transfer Function) curve of Example 3 is shown, 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 0~160lp / 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.

[0152] Figure 17 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 ±25μm, which shows that the optical lens can well correct the axial aberration.

[0153] Figure 18 ​The vertical color aberration curve of the 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. It can be seen from the figure that the vertical color aberration of the longest wavelength and the shortest wavelength is controlled within 0-4 μm, which indicates that the optical lens can well correct the color aberration of the edge field and the secondary spectrum of the entire image surface.

[0154] Embodiment 4

[0155] Referring to Figure 19 , which is a structural schematic diagram of the optical lens provided in the embodiment 4 of the present application, the optical lens sequentially 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 fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.

[0156] 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;

[0157] 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;

[0158] The third lens L3 has a negative focal power, the object side S5 and the image side S6 are both concave surfaces;

[0159] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0160] The stop ST;

[0161] The fifth lens L5 has a negative focal power, the object side S9 and the image side S10 are both concave surfaces;

[0162] The sixth lens L6 has a positive focal power, the object side S10 and the image side S11 are both convex surfaces;

[0163] 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;

[0164] The seventh lens L7 has a positive focal power, the object side S12 is a convex surface, and the image side S13 is a concave surface;

[0165] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0166] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0167] The imaging surface S18 is a flat surface.

[0168] The related parameters of each lens in the optical lens in Example 4 are shown in Table 4-1.

[0169] Table 4-1

[0170]

[0171]

[0172] The surface type parameters of the aspherical lens of the optical lens in Example 4 are shown in Table 4-2.

[0173] Table 4-2

[0174] Face number K A B C D E F S3 -1.81E+00 0.00E+00 5.81E-04 -2.13E-05 1.01E-06 -1.51E-08 7.08E-10 S4 -2.09E+00 0.00E+00 -9.42E-05 1.18E-05 -4.30E-08 -9.52E-09 6.85E-10 S7 -1.15E+00 0.00E+00 6.63E-05 1.20E-05 2.71E-07 -1.27E-08 1.15E-09 S8 9.87E-01 0.00E+00 -1.74E-05 5.45E-05 -5.06E-07 -1.18E-07 1.35E-08 S12 9.45E-01 0.00E+00 -2.06E-04 8.30E-06 1.68E-06 -7.35E-08 1.75E-09 S13 1.19E+01 0.00E+00 -1.93E-04 -9.15E-07 2.47E-06 -1.16E-07 2.64E-09

[0175] In this embodiment, the field curvature curve, F-Tanθ distortion curve, MTF curve, axial aberration curve, and transverse aberration curve of the optical lens are shown in FIGS. Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 、 Figure 24

[0176] Figure 20 The field curvature curve of Example 4 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 ±0.04 mm, which shows that the optical lens can well correct the field curvature.

[0177] Figure 21 The F-Tanθ distortion curve of Example 4 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 -6%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0178] Figure 22 The MTF (modulation transfer function) curve of Example 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 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 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 frequency and high frequency cases.

[0179] ​Figure 23 The axial aberration curve of the embodiment 4 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 -20 μm-25 μm, which shows that the optical lens can better correct the axial aberration.

[0180] Figure 24 The curve of the embodiment 4 is shown, which represents the color difference at different image heights on the imaging plane at each wavelength relative to the central wavelength (0.55 μm), the horizontal axis represents the color difference value (unit: μm) of each wavelength relative to the central wavelength, and the vertical axis represents the normalized field angle. As can be seen from the figure, the axial aberration of the longest wavelength and the shortest wavelength is controlled within -2 μm-4 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.

[0181] Embodiment 5

[0182] Please refer to Figure 25 , 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 plane, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0183] 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;

[0184] 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;

[0185] The third lens L3 has a negative focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface;

[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 stop ST;

[0188] The fifth lens L5 has a negative focal power, the object side S9 and the image side S10 are both concave surfaces;

[0189] The sixth lens L6 has a positive focal power, the object side S10 and the image side S11 are both convex surfaces;

[0190] 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;

[0191] 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;

[0192] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0193] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0194] The imaging surface S18 is a flat surface.

[0195] The related parameters of each lens in the optical lens in Embodiment 5 are shown in Table 5-1.

[0196] Table 5-1

[0197]

[0198]

[0199] The surface type parameters of the aspherical lens of the optical lens in Embodiment 5 are shown in Table 5-2.

[0200] Table 5-2

[0201] Face number K A B C D E F S3 -1.43E+00 0.00E+00 2.46E-04 -2.55E-05 2.18E-06 -5.33E-08 2.13E-10 S4 -1.68E+00 0.00E+00 -2.20E-04 1.12E-05 -5.40E-09 1.49E-09 -4.47E-11 S7 -1.16E+00 0.00E+00 1.08E-04 1.27E-05 2.56E-07 -1.36E-08 7.11E-10 S8 -6.54E+00 0.00E+00 5.20E-05 4.14E-05 3.95E-07 -9.68E-08 7.34E-09 S12 9.07E+00 0.00E+00 -1.08E-03 7.03E-06 -1.07E-07 7.98E-08 -1.05E-09 S13 2.71E+00 0.00E+00 -7.18E-04 8.00E-06 -3.05E-07 3.63E-08 -5.70E-10

[0202] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 26 、 Figure 27 、 Figure 28 、 Figure 29 、 Figure 30

[0203] Figure 26 The field curvature curve of Embodiment 5 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-0.04 mm-0.03 mm, which shows that the optical lens can well correct the field curvature.

[0204] Figure 27 The F-Tanθ distortion curve of Embodiment 5 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-11%-0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0205] Figure 28 ​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. 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 ability in the case of low frequency and high frequency.

[0206] Figure 29 The axial aberration curve of the embodiment 5 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-25 μm, which indicates that the optical lens can better correct the axial aberration.

[0207] Figure 30 The curve of the embodiment 5 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-1 μm-4 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.

[0208] Embodiment 6

[0209] Please refer to Figure 31 , which is a structural schematic diagram of the optical lens provided in the embodiment 6 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 fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0210] 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;

[0211] The second lens L2 has a positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0212] The third lens L3 has a negative focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface;

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

[0214] The stop ST;

[0215] The fifth lens L5 has negative refractive power, and both the object side S9 and the image side S10 are concave surfaces;

[0216] The sixth lens L6 has positive refractive power, and both the object side S10 and the image side S11 are convex surfaces;

[0217] 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;

[0218] The seventh lens L7 has positive refractive power, and both the object side S12 and the image side S13 are convex surfaces;

[0219] Both the object side S14 and the image side S15 of the filter G1 are flat surfaces;

[0220] Both the object side S16 and the image side S17 of the protective glass G2 are flat surfaces;

[0221] The imaging surface S18 is a flat surface.

[0222] The related parameters of the lenses in the optical lens in Embodiment 6 are shown in Table 6-1.

[0223] Table 6-1

[0224]

[0225] The surface type parameters of the aspherical lenses of the optical lens in Embodiment 6 are shown in Table 6-2.

[0226] Table 6-2

[0227] Face number K A B C D E F S3 -9.64E-01 0.00E+00 4.50E-04 6.07E-06 8.95E-08 -1.27E-08 6.22E-10 S4 -2.00E+00 0.00E+00 -1.23E-04 1.06E-05 4.46E-08 -8.65E-09 4.44E-10 S7 -8.76E-01 0.00E+00 2.05E-04 8.42E-06 4.67E-08 6.27E-09 2.57E-10 S8 -1.83E+01 0.00E+00 1.58E-04 3.25E-05 3.15E-07 -8.68E-08 9.24E-09 S12 3.33E+00 0.00E+00 -2.05E-04 3.20E-05 3.10E-06 -1.18E-08 -5.59E-10 S13 -4.50E+01 0.00E+00 -4.51E-04 3.34E-05 1.47E-06 -3.90E-08 8.40E-09

[0228] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 32 、 Figure 33 、 Figure 34 、 Figure 35 、 Figure 36

[0229] Figure 32 The field curvature curve of Embodiment 6 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 ±0.05 mm, which shows that the optical lens can well correct the field curvature.

[0230] Figure 33 ​The F-Tanθ distortion curve of the embodiment 6 is shown, which represents the F-Tanθ distortion of light rays of different wavelengths at different image heights on the imaging plane, 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 -22%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0231] Figure 34 The MTF (Modulation Transfer Function) curve of the embodiment 6 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.

[0232] Figure 35 The axial aberration curve of the embodiment 6 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 -10 μm~16 μm, which indicates that the optical lens can better correct the axial aberration.

[0233] Figure 36 The sagittal chromatic aberration curve of the embodiment 6 is shown, which represents the chromatic aberration of each wavelength at different image heights on the imaging plane relative to the center wavelength (0.55 μm), the horizontal axis represents the sagittal chromatic aberration value of each wavelength relative to the center 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 -2 μm~6 μm, which indicates that the optical lens can very well correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane.

[0234] Embodiment 7

[0235] Please refer to Figure 37 , which is a structural schematic diagram of the optical lens provided in the embodiment 7 of the present application, the optical lens sequentially 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 fourth lens L4, a diaphragm ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0236] 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;

[0237] The second lens L2 has positive refractive power, the object side S3 is concave, and the image side S4 is convex;

[0238] The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both concave;

[0239] The fourth lens L4 has positive refractive power, the object side S7 and the image side S8 are both convex;

[0240] The stop ST;

[0241] The fifth lens L5 has negative refractive power, the object side S9 and the image side S10 are both concave;

[0242] The sixth lens L6 has positive refractive power, the object side S10 and the image side S11 are both convex;

[0243] The fifth lens L5 and the sixth lens L6 form a cemented lens group, that is, the cemented surface S10 of the image side of the fifth lens L5 and the object side of the sixth lens L6;

[0244] The seventh lens L7 has positive refractive power, the object side S12 and the image side S13 are both convex;

[0245] The object side S14 and the image side S15 of the filter G1 are both flat;

[0246] The object side S16 and the image side S17 of the protective glass G2 are both flat;

[0247] The imaging surface S18 is flat.

[0248] The related parameters of the lenses in the optical lens in Embodiment 7 are shown in Table 7-1.

[0249] Table 7-1

[0250]

[0251]

[0252] The surface type parameters of the aspherical lens of the optical lens in Embodiment 7 are shown in Table 7-2.

[0253] Table 7-2

[0254] Face number K A B C D E F S3 -1.34E+00 0.00E+00 4.80E-04 4.32E-07 1.50E-07 -1.45E-08 4.64E-10 S4 -2.41E+00 0.00E+00 -4.40E-05 1.09E-05 1.46E-08 -5.71E-09 2.76E-10 S7 -8.84E-01 0.00E+00 2.11E-04 5.91E-06 1.23E-07 8.67E-09 1.16E-10 S8 -1.61E+01 0.00E+00 1.28E-04 3.61E-05 2.91E-07 -5.89E-08 5.85E-09 S12 -6.38E+00 0.00E+00 -2.83E-04 1.40E-05 4.07E-06 -5.05E-08 2.35E-09 S13 -4.50E+01 0.00E+00 -6.74E-04 2.18E-05 1.04E-06 2.91E-08 4.80E-09

[0255] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the off-axis chromatic aberration curve of the optical lens are shown in Figure 38 、 Figure 39 、 Figure 40 、 Figure 41 、 Figure 42 respectively.

[0256] Figure 38 The field curvature curve of Example 7 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 ±0.06 mm, which shows that the optical lens can well correct the field curvature.

[0257] Figure 39 The F-Tanθ distortion curve of Example 7 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 -22%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0258] Figure 40 The MTF (Modulation Transfer Function) curve of Example 7 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 0~160 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 frequency and high frequency conditions.

[0259] Figure 41 The axial aberration curve of Example 7 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 -10 μm~16 μm, which shows that the optical lens can well correct the axial aberration.

[0260] Figure 42 The axial aberration curve of Example 7 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 -10 μm~16 μm, which shows that the optical lens can well correct the axial aberration.

[0261] Example 8

[0262] Please refer to Figure 43Figure 8 shows a structural schematic diagram of an optical lens provided in Embodiment 8 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 fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0263] The first lens L1 has negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface.

[0264] The second lens L2 has positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface.

[0265] The third lens L3 has negative focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface.

[0266] The fourth lens L4 has positive focal power, the object side S7 and the image side S8 are both convex surfaces.

[0267] The stop ST.

[0268] The fifth lens L5 has negative focal power, the object side S9 and the image side S10 are both concave surfaces.

[0269] The sixth lens L6 has positive focal power, the object side S10 and the image side S11 are both convex surfaces.

[0270] 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.

[0271] The seventh lens L7 has positive focal power, the object side S12 is a convex surface, and the image side S13 is a concave surface.

[0272] The object side S14 and the image side S15 of the filter G1 are both flat surfaces.

[0273] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces.

[0274] The imaging surface S18 is a flat surface.

[0275] The related parameters of the lenses in the optical lens in Embodiment 8 are shown in Table 8-1.

[0276] Table 8-1

[0277]

[0278]

[0279] The surface type parameters of the aspherical lenses in the optical lens in Embodiment 8 are shown in Table 8-2.

[0280] Table 8-2

[0281] Face number K A B C D E F S3 -1.80E+00 0.00E+00 7.28E-04 -1.65E-05 6.61E-07 -8.98E-09 4.90E-10 S4 -2.06E+00 0.00E+00 -6.56E-05 1.14E-05 -8.92E-08 -5.98E-09 4.14E-10 S7 -1.07E+00 0.00E+00 1.02E-04 1.03E-05 1.88E-07 -6.51E-09 7.79E-10 S8 -7.23E-01 0.00E+00 -5.42E-05 4.50E-05 3.08E-07 -1.43E-07 1.06E-08 S12 -1.15E+00 0.00E+00 -3.17E-04 1.03E-05 1.91E-06 -3.99E-08 6.90E-10 S13 5.24E+00 0.00E+00 -3.53E-04 1.61E-05 2.41E-06 -9.25E-08 6.12E-09

[0282] In this embodiment, the field curvature curve, F-Tanθ distortion curve, MTF curve, axial aberration curve and lateral chromatic aberration curve of the optical lens are shown in FIGS. 8-1 to 8-4, respectively. Figure 44 、 Figure 45 、 Figure 46 、 Figure 47 、 Figure 48

[0283] Figure 44 The field curvature curve of Example 8 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 ~ 0.02 mm, which shows that the optical lens can well correct the field curvature.

[0284] Figure 45 The F-Tanθ distortion curve of Example 8 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 -11% ~ 0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0285] Figure 46 The MTF (Modulation Transfer Function) curve of Example 8 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 low frequency and high frequency conditions.

[0286] Figure 47 The axial aberration curve of Example 8 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 -20 μm ~ 25 μm, which shows that the optical lens can well correct the axial aberration.

[0287] Figure 48 ​The vertical color aberration curve of embodiment 8 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 -1 μm ~ 4 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 surface.

[0288] Embodiment 9

[0289] Referring to Figure 49 , which is a structural schematic diagram of the optical lens provided in embodiment 9 of the present application, the optical lens sequentially 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 fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.

[0290] 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;

[0291] The second lens L2 has a positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0292] The third lens L3 has a negative focal power, the object side S5 and the image side S6 are both concave surfaces;

[0293] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0294] The stop ST;

[0295] The fifth lens L5 has a negative focal power, the object side S9 and the image side S10 are both concave surfaces;

[0296] The sixth lens L6 has a positive focal power, the object side S10 and the image side S11 are both convex surfaces;

[0297] 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;

[0298] The seventh lens L7 has a positive focal power, the object side S12 is a convex surface, and the image side S13 is a concave surface;

[0299] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0300] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0301] The imaging surface S18 is a flat surface.

[0302] The related parameters of each lens in the optical lens in embodiment 9 are shown in Table 9-1.

[0303] Table 9-1

[0304]

[0305] The surface type parameters of the aspherical lens of the optical lens in embodiment 9 are shown in Table 9-2.

[0306] Table 9-2

[0307] Face number K A B C D E F S3 -1.82E+00 0.00E+00 6.06E-04 -1.92E-05 9.95E-07 -1.94E-08 7.98E-10 S4 -2.06E+00 0.00E+00 -1.09E-04 1.11E-05 -3.54E-08 -8.76E-09 5.80E-10 S7 -1.14E+00 0.00E+00 7.29E-05 1.24E-05 2.70E-07 -1.37E-08 1.27E-09 S8 1.74E+00 0.00E+00 -3.53E-05 5.41E-05 -4.27E-07 -1.09E-07 1.28E-08 S12 5.99E-01 0.00E+00 -2.68E-04 8.96E-06 1.74E-06 -7.30E-08 1.73E-09 S13 1.15E+01 0.00E+00 -2.94E-04 -2.63E-07 2.65E-06 -1.13E-07 2.24E-09

[0308] In this embodiment, the field curvature curve, F-Tanθ distortion curve, MTF curve, axial aberration curve and transverse aberration curve of the optical lens are shown in FIGS. Figure 50 、 Figure 51 、 Figure 52 、 Figure 53 、 Figure 54 .

[0309] Figure 50 The field curvature curve of embodiment 9 is shown, which represents the curvature of meridional image surface and sagittal image surface of light rays of different wavelengths, 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 ±0.04 mm, which shows that the optical lens can well correct the field curvature.

[0310] Figure 51 The F-Tanθ distortion curve of embodiment 9 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: °). It can be seen from the figure that the F-Tanθ distortion of the optical lens is controlled within -5%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0311] Figure 52 The MTF (modulation transfer function) curve of embodiment 9 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. It can be seen from the figure that 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 field of view, and has good imaging quality and good detail resolution ability in low frequency and high frequency cases.

[0312] Figure 53The axial aberration curve of the embodiment 9 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 -15 μm ~ 25 μm, which shows that the optical lens can better correct the axial aberration.

[0313] Figure 54 The curve of the embodiment 9 is shown, which represents the color difference 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 difference 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 axial aberration of the longest wavelength and the shortest wavelength is controlled within -2 μm ~ 4 μm, which shows that the optical lens can very well correct the color difference of the edge field and the secondary spectrum of the entire image plane.

[0314] Embodiment 10

[0315] Please refer to Figure 55 , which is a structural schematic diagram of the optical lens provided in the embodiment 10 of the present application, which 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 fourth lens L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0316] 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;

[0317] The second lens L2 has a positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface;

[0318] The third lens L3 has a negative focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface;

[0319] The fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces;

[0320] The stop ST;

[0321] The fifth lens L5 has a negative focal power, the object side S9 and the image side S10 are both concave surfaces;

[0322] The sixth lens L6 has a positive focal power, the object side S10 and the image side S11 are both convex surfaces;

[0323] 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;

[0324] 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;

[0325] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0326] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0327] The imaging surface S18 is a flat surface.

[0328] The related parameters of each lens in the optical lens in Embodiment 10 are shown in Table 10-1.

[0329] Table 10-1

[0330]

[0331] The surface type parameters of the aspherical lens of the optical lens in Embodiment 10 are shown in Table 10-2.

[0332] Table 10-2

[0333]

[0334]

[0335] In this embodiment, the field curvature curve, the F-Tanθ distortion curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 56 、 Figure 57 、 Figure 58 、 Figure 59 、 Figure 60

[0336] Figure 56 The field curvature curve of Embodiment 10 is shown, which represents the curvature of the meridional image surface and the sagittal image surface of light rays of different wavelengths, 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, which shows that the optical lens can well correct the field curvature.

[0337] Figure 57 The F-Tanθ distortion curve of Embodiment 10 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 -10%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0338] Figure 58 ​The MTF (Modulation Transfer Function) curve of the embodiment 10 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 ability in the case of low frequency and high frequency.

[0339] Figure 59 The axial aberration curve of the embodiment 10 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-15 μm-25 μm, which shows that the optical lens can better correct the axial aberration.

[0340] Figure 60 The curve of the embodiment 10 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 of view angle. It can be seen from the figure that the vertical color difference of the longest wavelength and the shortest wavelength is controlled within 0-4 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 surface.

[0341] Please refer to Table 11, 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 angle FOV of the optical lens, and the numerical value corresponding to each conditional expression in each embodiment.

[0342] Table 11-1

[0343]

[0344] Table 11-2

[0345]

[0346]

[0347] In summary of the above embodiments, the optical lens provided by the present application has infrared confocal function, meets the clarity requirements of daytime and night imaging, improves the resolving power of the optical lens, reduces the aberration, and improves the imaging quality of the optical lens through reasonable configuration of each lens surface and reasonable matching of optical power.

[0348] In the description of the present specification, the description of 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0349] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for those of ordinary skill 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 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 refractive power, whose object side surface is a concave surface and whose image side surface is a convex surface; a third lens with negative refractive power, whose object side surface is a concave surface; a fourth lens with positive refractive power, whose object side surface and image side surface are both convex surfaces; a stop; 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 and image side surface are both convex surfaces; a seventh lens with positive refractive power; a real image height IH corresponding to a maximum field angle of the optical lens and an entrance pupil diameter EPD satisfy: 2.0<IH / EPD<3.3; 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; an effective focal length f of the optical lens and a focal length f3 of the third lens satisfy: -5.0<f3 / f<-2.

0.

2. The optical lens of claim 1, wherein, An entrance pupil diameter EPD of the optical lens satisfies: 2.5<EPD<4.

0.

3. The optical lens of claim 1, wherein, An optical total length TTL of the optical lens and an effective focal length f satisfy: 3.5<TTL / f<7.

0.

4. The optical lens of claim 1, wherein, An effective focal length f of the optical lens, a maximum field angle FOV and a real image height IH corresponding to the maximum field angle satisfy: 0.7<(IH / 2) / (fxtan(FOV / 2))<1.

0.

5. The optical lens of claim 1, wherein, A maximum field angle FOV of the optical lens and an aperture value FNO satisfy: 25°<FOV / FNO<50°.

6. The optical lens of claim 1, wherein, A maximum field angle FOV of the optical lens, a real image height IH corresponding to the maximum field angle and an entrance pupil diameter D1 of the object side surface of the first lens satisfy: 1.5<D1 / IH / tan(FOV / 2)<2.

8.

7. 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: -1.5<f5 / f<-0.

5.

8. 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: 5.0<f7 / f<7.

5.

9. The optical lens of claim 1, wherein, an effective focal length f of the optical lens and a combined focal length f of the first lens to the fourth lens 14 satisfies: 0.7 < f 14 / f < 0.9; an effective focal length f of the optical lens and a combined focal length f of the fifth lens to the seventh lens 57 satisfies: 5.0 < f 57 / f < 88.0.

Images