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 of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens with negative optical power, wherein the image side surface of the second lens is a concave surface; a third lens with positive optical power, wherein the object side surface and the image side surface of the third lens are both convex surfaces; a fourth lens with negative optical power; a fifth lens with negative optical power, wherein the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; a sixth lens with positive optical power, wherein the object side surface of the sixth lens is a convex surface; and a seventh lens with positive optical power, wherein the object side surface of the seventh lens is a convex 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 shape 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] The panoramic surround view system sets up multiple surround view cameras around the vehicle that can cover all the field of view ranges around the vehicle, fuses the angles of view of the multiple cameras into a 360-degree overhead view of the vehicle body, and finally displays on the screen of the center console to let the driver clearly check whether there are obstacles around the vehicle and understand the relative position and distance of the obstacles, helping the driver to easily park the vehicle. Not only is it very intuitive, but also there is no blind spot, which can improve the driver's comfortable control of the vehicle parking or passing through complex roads, effectively reducing the occurrence of accidents such as scratching, collision, and sinking.

[0004] At present, the surround view camera lens generally uses a wide-angle lens, which has the problems of large aberration, large field curvature, poor imaging quality, etc., and is difficult to meet the user's needs. SUMMARY

[0005] 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.

[0006] The present application provides an optical lens, which has a total of seven lenses, and includes, along the optical axis from the object side to the imaging surface:

[0007] The first lens has a negative focal power, the object side surface is convex, and the image side surface is concave;

[0008] The second lens has a negative focal power, and the image side surface is concave;

[0009] The third lens has a positive focal power, and both the object side surface and the image side surface are convex;

[0010] The fourth lens has a negative focal power;

[0011] The fifth lens has a negative focal power, the object side surface is convex, and the image side surface is concave;

[0012] The sixth lens has a positive focal power, and the object side surface is convex;

[0013] The seventh lens has a positive focal power, and the object side surface is convex.

[0014] It is further preferred that the object-side surface curvature radius R1 of the first lens and the image-side surface curvature radius R2 of the first lens satisfy: 0.4 < (R1-R2) / (R1+R2) < 0.8.

[0015] It is further preferred that the object-side surface curvature radius R1 of the first lens and the image-side surface curvature radius R2 of the first lens satisfy: 2.5 < R1 / R2 < 6.0.

[0016] It is further preferred that the object-side surface curvature radius R1 of the first lens and the effective focal length f of the optical lens satisfy: 3.5 < R1 / f.

[0017] It is further preferred that the total track length TTL of the optical lens and the effective focal length f satisfy: 7.5 < TTL / f < 11.0.

[0018] It is further preferred that the total track length TTL of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 2.5 < TTL / IH < 4.0.

[0019] It is further preferred that the effective focal length f of the optical lens and the radian θ of the maximum half field of view angle and the real image height IH corresponding to the maximum field of view angle satisfy: 0.8 < (IH / 2) / (f x θ) < 1.1.

[0020] It is further preferred that the maximum field of view angle FOV of the optical lens and the aperture value FNO satisfy: 70° < FOV / FNO < 140°.

[0021] It is further preferred that the real image height IH corresponding to the maximum field of view angle of the optical lens and the entrance pupil diameter EPD satisfy: 4.0 < IH / EPD < 7.0.

[0022] It is further preferred that the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -5.5 < f1 / f < -2.0.

[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 F-Theta distortion curve of the optical lens in Embodiment 1 of the present application.

[0028] Figure 4 Relative illumination 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 illumination 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 illumination 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 20 Axial aberration curve of the optical lens in Embodiment 3 of the present application.

[0045] Figure 21 Decentration 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 illumination 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 Decentration 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 illumination 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 35The vertical axis chromatic aberration curve of the optical lens in the embodiment 5 of the present application.

[0060] Figure 36 The structure diagram of the optical lens in the embodiment 6 of the present application.

[0061] Figure 37 The field curvature curve of the optical lens in the embodiment 6 of the present application.

[0062] Figure 38 The F-Theta distortion curve of the optical lens in the embodiment 6 of the present application.

[0063] Figure 39 The relative luminance curve of the optical lens in the embodiment 6 of the present application.

[0064] Figure 40 The MTF curve of the optical lens in the embodiment 6 of the present application.

[0065] Figure 41 The axial aberration curve of the optical lens in the embodiment 6 of the present application.

[0066] Figure 42 The vertical axis chromatic aberration curve of the optical lens in the embodiment 6 of the present application.

[0067] Figure 43 The structure diagram of the optical lens in the embodiment 7 of the present application.

[0068] Figure 44 The field curvature curve of the optical lens in the embodiment 7 of the present application.

[0069] Figure 45 The F-Theta distortion curve of the optical lens in the embodiment 7 of the present application.

[0070] Figure 46 The relative luminance curve of the optical lens in the embodiment 7 of the present application.

[0071] Figure 47 The MTF curve of the optical lens in the embodiment 7 of the present application.

[0072] Figure 48 The axial aberration curve of the optical lens in the embodiment 7 of the present application.

[0073] Figure 49 The vertical axis chromatic aberration curve of the optical lens in the embodiment 7 of the present application.

[0074] Figure 50 The structure diagram of the optical lens in the embodiment 8 of the present application.

[0075] Figure 51 The field curvature curve of the optical lens in the embodiment 8 of the present application.

[0076] Figure 52 F-Theta distortion curve of the optical lens in embodiment 8 of the present application.

[0077] Figure 53 Relative illumination curve of the optical lens in embodiment 8 of the present application.

[0078] Figure 54 MTF curve of the optical lens in embodiment 8 of the present application.

[0079] Figure 55 Axial aberration curve of the optical lens in embodiment 8 of the present application.

[0080] Figure 56 Transverse chromatic aberration curve of the optical lens in embodiment 8 of the present application.

[0081] Figure 57 Structural schematic diagram of the optical lens in embodiment 9 of the present application.

[0082] Figure 58 Curvature of field curve of the optical lens in embodiment 9 of the present application.

[0083] Figure 59 F-Theta distortion curve of the optical lens in embodiment 9 of the present application.

[0084] Figure 60 Relative illumination curve of the optical lens in embodiment 9 of the present application.

[0085] Figure 61 MTF curve of the optical lens in embodiment 9 of the present application.

[0086] Figure 62 Axial aberration curve of the optical lens in embodiment 9 of the present application.

[0087] Figure 63 Transverse chromatic aberration curve of the optical lens in embodiment 9 of the present application.

[0088] Figure 64 Structural schematic diagram of the optical lens in embodiment 10 of the present application.

[0089] Figure 65 Curvature of field curve of the optical lens in embodiment 10 of the present application.

[0090] Figure 66 F-Theta distortion curve of the optical lens in embodiment 10 of the present application.

[0091] Figure 67 Relative illumination curve of the optical lens in embodiment 10 of the present application.

[0092] Figure 68 MTF curve diagram of the optical lens in Embodiment 10 of the present application.

[0093] Figure 69 Axial aberration curve diagram of the optical lens in Embodiment 10 of the present application.

[0094] Figure 70 Axial aberration curve diagram of the optical lens in Embodiment 10 of the present application.

[0095] The following detailed description will further describe the present application with reference to the above-mentioned drawings. DETAILED DESCRIPTION

[0096] 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 reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0097] It should 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 on the features. Thus, the first lens discussed below can also be referred to as a second lens or a third lens without departing from the teachings of the present application.

[0098] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0099] 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.

[0100] 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. In addition, when terms such as "at least one of" are used, this is meant to instill an inclusionary meaning, as opposed to an exclusive one. Moreover, when describing the embodiments of the present application, the use of "can" means "one or more embodiments of the present application." Also, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation of the application described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0101] 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.

[0102] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0103] The optical lens of the embodiment of the present application comprises, in sequence along the optical axis from the object side to the imaging surface: 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.

[0104] In some embodiments, the first lens can have a negative focal power, which is conducive to reducing the angle of incidence of the incident light, thereby effectively sharing the large field of view on the object side. The object side of the first lens is convex, and the image side is concave, which is conducive to collecting as much edge field of view light as possible into the rear optical lens, thereby realizing large-angle light collection.

[0105] In some embodiments, the second lens can have a negative focal power, which can share the negative focal power of the front end of the lens, thereby reducing the excessive deflection of light caused by the excessive concentration of the focal power of the first lens, and reducing the difficulty of chromatic aberration correction of the optical lens. The image side of the second lens is concave, which is conducive to converging the outgoing light, avoiding excessive size of the lens outer diameter.

[0106] In some embodiments, the third lens can have a positive focal power, which is conducive to improving the light convergence ability of the optical lens. The object side and the image side of the third lens are both convex, which is conducive to balancing various aberrations generated by the optical lens and improving the imaging quality of the optical lens.

[0107] In some embodiments, the fourth lens can have negative refractive power, which is conducive to reducing the light deflection angle, making the light trend smooth transition, and improving the imaging quality of the optical lens.

[0108] In some embodiments, the fifth lens can have negative refractive power, which is conducive to increasing the imaging area of the optical lens and improving the imaging quality of the optical lens. The object side of the fifth lens is convex, and the image side is concave, which can reduce the ghost energy of the light reflected by the object side of the fifth lens, and also reduce the spherical aberration generated by the fifth lens itself, thereby improving the imaging quality of the optical lens.

[0109] In some embodiments, the sixth lens can have positive refractive power, which is conducive to improving the chromatic aberration of the optical lens and improving the imaging quality of the optical lens. The object side of the sixth lens is convex, which is conducive to forming a cemented lens with the fifth lens, thereby improving the chromatic aberration of the optical lens and improving the imaging quality of the optical lens.

[0110] In some embodiments, the seventh lens can have positive refractive power, and the object side thereof is convex, which is conducive to suppressing the angle of the edge field of view incident on the imaging surface, effectively transmitting more light beams to the imaging surface, and improving the imaging quality of the optical lens.

[0111] In some embodiments, the object side curvature radius R1 of the first lens and the image side curvature radius R2 of the first lens satisfy: 0.4<(R1-R2) / (R1+R2)<0.8. Satisfying the above range can reduce the distortion generated by the first lens as much as possible, reduce the requirement for distortion correction of subsequent lenses, and improve the imaging quality of the optical lens.

[0112] In some embodiments, the object side curvature radius R1 of the first lens and the image side curvature radius R2 of the first lens satisfy: 2.5<R1 / R2<6.0. Satisfying the above range is conducive to realizing wide-angle characteristics, thereby being able to obtain more scene information and meeting the needs of wide-range detection of the optical lens.

[0113] In some embodiments, the object side curvature radius R1 of the first lens and the effective focal length f of the optical lens satisfy: 3.5<R1 / f. The image side curvature radius R2 of the first lens and the effective focal length f of the optical lens satisfy: R2 / f<1.9. Satisfying the above range is conducive to realizing ultra-wide-angle characteristics, thereby being able to obtain more scene information and meeting the needs of wide-range detection of the optical lens.

[0114] In some embodiments, the total optical length TTL of the optical lens and the effective focal length f satisfy: 7.5<TTL / f<11.0. Satisfying the above range ensures sufficient space for adjusting the lens structure and optimizing the imaging effect.

[0115] In some embodiments, the total track length TTL of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 2.5 < TTL / IH < 4.0. Satisfying the above range can effectively balance the demand for image height and miniaturization of the optical lens.

[0116] In some embodiments, the effective focal length f of the optical lens and the radian θ of the maximum half field of view angle and the real image height IH corresponding to the maximum field of view angle satisfy: 0.8 < (IH / 2) / (f x θ) < 1.1. Satisfying the above range is conducive to controlling the smooth change of the edge distortion of the optical lens, and facilitating the restoration by software algorithm later.

[0117] In some embodiments, the maximum field of view angle FOV of the optical lens and the aperture value FNO satisfy: 70° < FOV / FNO < 140°. Satisfying the above range is conducive to expanding the field of view angle 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 demand of large range detection, and the realization of large aperture characteristics is conducive to improving the problem of rapid decline of relative brightness of edge field of view, so as to also be conducive to obtaining more scene information.

[0118] 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: 4.0 < IH / EPD < 7.0. Satisfying the above range can increase the width of the light beam entering the optical lens, so that the brightness of the optical lens at the image plane is improved to avoid dark corners.

[0119] In some embodiments, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -5.5 < f1 / f < -2.0. Satisfying the above range can make the first lens have appropriate negative focal power, which is conducive to reducing the inclination angle of the incident light, and is conducive to collecting as much edge field of view light as possible into the rear optical lens to realize large angle light collection.

[0120] In some embodiments, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -4.0 < f2 / f < -1.5. Satisfying the above range can make the second lens have appropriate negative focal power, which can share the negative focal power of the front end of the lens, thereby reducing the excessive light deflection caused by the excessive concentration of the focal power of the first lens, and reducing the difficulty of chromatic aberration correction of the optical lens.

[0121] 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 < 6.0. Satisfying the above range can make the third lens have appropriate positive focal power, which is conducive to improving the light convergence ability of the optical lens. It is conducive to balancing various aberrations generated by the optical lens and improving the imaging quality of the optical lens.

[0122] In some embodiments, the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: f4 / f <-3.0. Satisfying the above range is conducive to reducing the light deflection angle, making the light trend transition smoothly, and improving the imaging quality of the optical lens.

[0123] In some embodiments, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: -5.5 < f5 / f < -2.0. Satisfying the above range can make the fifth lens have appropriate negative focal power, be conducive to increasing the imaging area of the optical lens, and can optimize the chromatic aberration of the optical lens, thereby improving the imaging quality of the optical lens.

[0124] In some embodiments, the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy: 1.0 < f6 / f < 2.0. Satisfying the above range can make the sixth lens have appropriate positive focal power, be conducive to improving the light convergence capability of the optical lens, and be conducive to balancing various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0125] In some embodiments, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy: 2.5 < f7 / f < 7.5. Satisfying the above range can make the seventh lens have appropriate positive focal power, be conducive to suppressing the angle of the edge field of view incident on the imaging surface, and effectively transfer more light beams to the imaging surface, thereby improving the imaging quality of the optical lens.

[0126] In some embodiments, the maximum field of view angle FOV of the optical lens satisfies: 155° < FOV < 225°. Satisfying the above range can realize that the optical lens has a large field of view angle.

[0127] In some embodiments, the aperture value FNO of the optical lens satisfies: 1.5 < FNO < 2.5. Satisfying the above range is conducive to realizing the large aperture characteristic of the lens, increasing the light quantity, and improving the imaging effect of the lens in a dark environment.

[0128] In some embodiments, the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 2.5 < IH / f < 4.0. Satisfying the above range is conducive to balancing the size of the field of view angle and the size of the F-Theta distortion of the optical lens, thereby improving the imaging quality of the optical lens.

[0129] In some embodiments, the optical back focal length BFL of the optical lens and the effective focal length f satisfy: 1.0 < BFL / f < 2.5. Satisfying the above range is conducive to balancing the good imaging quality and the easy-to-assemble optical back focal length length, thereby guaranteeing the imaging quality of the optical lens, avoiding interference between the lens and other elements, and reducing the assembly process difficulty of the camera module.

[0130] In some embodiments, the object-side surface curvature radius R3 of the second lens and the image-side surface curvature radius R4 of the second lens satisfy: -4.0 < (R3-R4) / (R3+R4) < 6.5. Satisfying the above range can reduce the difficulty of lens aberration optimization, thereby improving the lens imaging quality.

[0131] In some embodiments, the object-side surface curvature radius R3 of the second lens and the image-side surface curvature radius R4 of the second lens satisfy: -23.0 < R3 / R4 < 16.0. Satisfying the above range can balance the aberration generated by the second lens itself, thereby improving the lens imaging quality.

[0132] 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 respectively satisfy: 0.4 < ∑CT / TTL < 0.7. Satisfying the above range is conducive to the structural design and production process of the optical lens.

[0133] In some embodiments, the effective focal length f of the optical lens and the central thickness CT3 of the third lens along the optical axis satisfy: 0.4 < CT3 / f < 2.6. Satisfying the above range can improve the field curvature of the ultra-wide-angle lens by setting the thickness of the third lens, thereby reducing the difficulty of lens aberration optimization and improving the lens imaging quality.

[0134] 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; and 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.

[0135] In some embodiments, the seventh lens can adopt a surface type of an aspherical lens to improve the resolution quality.

[0136] In order to make the system have better optical performance, an aspherical lens is adopted in the lens, and each aspherical surface shape of the optical lens satisfies the following equation:

[0137]

[0138] wherein z is the distance of the curved surface from the vertex of the curved surface in the optical axis direction, 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, and F are the second-order, fourth-order, sixth-order, eighth-order, tenth-order, and twelfth-order surface coefficients, respectively.

[0139] 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.

[0140] Embodiment 1

[0141] 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 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.

[0142] 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;

[0143] The second lens L2 has negative focal power, and the object side S3 and the image side S4 are both concave surfaces;

[0144] The third lens L3 has positive focal power, and the object side S5 and the image side S6 are both convex surfaces;

[0145] The fourth lens L4 has negative focal power, the object side S7 is a concave surface, and the image side S8 is a convex surface;

[0146] The diaphragm ST;

[0147] The fifth lens L5 has negative focal power, the object side S9 is a convex surface, and the image side S10 is a concave surface;

[0148] The sixth lens L6 has positive focal power, and the object side S10 and the image side S11 are both convex surfaces;

[0149] 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;

[0150] The seventh lens L7 has positive focal power, and the object side S12 and the image side S13 are both convex surfaces;

[0151] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0152] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0153] The imaging surface S18 is a plane.

[0154] The related parameters of each lens in the optical lens in Embodiment 1 are shown in Table 1-1.

[0155] Table 1-1

[0156]

[0157]

[0158] The surface type parameters of the aspherical lens of the optical lens in Embodiment 1 are shown in Table 1-2.

[0159] Table 1-2

[0160] Surface Number K A B C D E F S12 1.23E+02 0.00E+00 -3.23E-03 -2.55E-04 2.94E-05 -3.66E-06 1.35E-07 S13 1.82E+01 0.00E+00 -2.01E-03 -2.02E-04 2.62E-05 -2.30E-06 7.25E-08

[0161] 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

[0162] Figure 2 The field curvature curve of Embodiment 1 is shown, which represents the curvature of the 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: °). 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~0.04mm, which shows that the optical lens can well correct the field curvature.

[0163] Figure 3 The F-Theta distortion curve of Embodiment 1 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 (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 -6%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0164] Figure 4 The relative illumination curve of Embodiment 1 is shown, which represents the relative illumination value of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, which shows that the optical lens has good relative illumination.

[0165] ​Figure 5 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. It can be seen from the figure that the MTF value of the embodiment is above 0.3 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.

[0166] Figure 6 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 surface, 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-30 μm, which indicates that the optical lens can better correct the axial aberration.

[0167] Figure 7 The curve of the embodiment 1 is shown, which represents the axial aberration of each wavelength on the imaging surface at different image heights relative to the center wavelength (0.55 μm), the horizontal axis represents the axial aberration 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 axial aberration of the longest wavelength and the shortest wavelength is controlled within-3 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.

[0168] Embodiment 2

[0169] Please refer to Figure 8 , which is a structural schematic diagram of the optical lens provided in the embodiment 2 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 diaphragm ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1 and a protective glass G2.

[0170] 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;

[0171] The second lens L2 has a negative focal power, and the object side S3 and the image side S4 are both concave surfaces;

[0172] The third lens L3 has a positive focal power, and the object side S5 and the image side S6 are both convex surfaces;

[0173] The fourth lens L4 has a negative focal power, the object side S7 is a concave surface, and the image side S8 is a convex surface;

[0174] The diaphragm ST;

[0175] The fifth lens L5 has negative refractive power, the object side S9 is a convex surface, and the image side S10 is a concave surface;

[0176] The sixth lens L6 has positive refractive power, the object side S10 is a convex surface, and the image side S11 is a concave surface;

[0177] The fifth lens L5 and the sixth lens L6 constitute a cemented lens group, that is, the cemented surface of the image side of the fifth lens L5 and the object side of the sixth lens L6 is S10;

[0178] The seventh lens L7 has positive refractive power, the object side S12 and the image side S13 are both convex surfaces;

[0179] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0180] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0181] The imaging surface S18 is a flat surface.

[0182] The related parameters of the lenses in the optical lens in Embodiment 2 are shown in Table 2-1.

[0183] Table 2-1

[0184]

[0185]

[0186] The surface type parameters of the aspherical lenses of the optical lens in Embodiment 2 are shown in Table 2-2.

[0187] Table 2-2

[0188] Surface Number K A B C D E F S12 -7.14E+01 0.00E+00 5.41E-03 -1.86E-03 2.74E-04 -2.60E-05 9.94E-07 S13 1.17E+00 0.00E+00 6.14E-05 -4.77E-04 6.54E-05 -5.48E-06 1.75E-07

[0189] In this embodiment, the field curvature curve, the F-Theta distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14

[0190] Figure 9 The field curvature curve of Embodiment 2 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-0.05mm-0.15mm, which shows that the optical lens can well correct the field curvature.​

[0191] Figure 10 F-Theta distortion curve of embodiment 2 is shown, 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 (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 -10%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0192] Figure 11 The relative illumination curve of embodiment 2 is shown, which represents the relative illumination value of different field angles on the imaging plane, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 40% at the maximum half field angle, indicating that the optical lens has good relative illumination.

[0193] Figure 12 The MTF (Modulation Transfer Function) curve of embodiment 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 embodiment is above 0.3 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.

[0194] Figure 13 The axial aberration curve of embodiment 2 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -25 μm~15 μm, indicating that the optical lens can better correct the axial aberration.

[0195] Figure 14 The axial aberration curve of embodiment 2 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -25 μm~15 μm, indicating that the optical lens can better correct the axial aberration.

[0196] Embodiment 3

[0197] Please refer to Figure 15Figure 3 shows a structural schematic diagram of the optical lens provided in Embodiment 3 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.

[0198] The related parameters of the lenses in the optical lens in Embodiment 3 are shown in Table 3-1.

[0199] Table 3-1

[0200]

[0201]

[0202] The surface type parameters of the aspherical lens of the optical lens in Embodiment 3 are shown in Table 3-2.

[0203] Table 3-2

[0204] Surface Number K A B C D E F S12 7.64E+01 0.00E+00 -1.79E-03 -5.08E-05 7.80E-06 -2.06E-06 1.18E-07 S13 6.06E+01 0.00E+00 1.71E-04 -1.20E-04 1.85E-05 -1.52E-06 5.19E-08

[0205] 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 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21

[0206] Figure 16 Figure 9 shows the field curvature curve of Embodiment 3, which represents the curvature of the 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: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within -0.09mm-0.07mm, which indicates that the optical lens can well correct the field curvature.

[0207] Figure 17 Figure 10 shows the F-Theta distortion curve of Embodiment 3, 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 (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 -6%-0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0208] Figure 18 ​The relative luminance curve of the embodiment 3 is shown, which represents the relative luminance values of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative luminance (unit: %). As can be seen from the figure, the relative luminance value of the optical lens is still greater than 70% at the maximum half field angle, which indicates that the optical lens has good relative luminance.

[0209] Figure 19 The MTF (modulation transfer function) curve of the embodiment 3 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 0.3 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge field of view, and has good imaging quality and good detail resolution capability in the case of low frequency and high frequency.

[0210] Figure 20 The axial aberration curve of the embodiment 3 is shown, which represents the axial aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within-20 μm-20 μm, which indicates that the optical lens can better correct the axial aberration.

[0211] Figure 21 The axial aberration curve of the embodiment 3 is shown, which represents the axial aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within-20 μm-20 μm, which indicates that the optical lens can better correct the axial aberration.

[0212] Embodiment 4

[0213] Please refer to Figure 22 , which is a structural schematic diagram of the optical lens provided in the embodiment 4 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.

[0214] 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;

[0215] The second lens L2 has a negative focal power, and the object side S3 and the image side S4 are both concave surfaces;

[0216] The third lens L3 has positive refractive power, and both the object side S5 and the image side S6 are convex surfaces;

[0217] The fourth lens L4 has negative refractive power, the object side S7 is a convex surface, and the image side S8 is a concave surface;

[0218] The stop ST;

[0219] The fifth lens L5 has negative refractive power, the object side S9 is a convex surface, and the image side S10 is a concave surface;

[0220] The sixth lens L6 has positive refractive power, the object side S10 is a convex surface, and the image side S11 is a concave surface;

[0221] 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;

[0222] The seventh lens L7 has positive refractive power, and both the object side S12 and the image side S13 are convex surfaces;

[0223] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0224] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0225] The imaging surface S18 is a flat surface.

[0226] The related parameters of the lenses in the optical lens in Embodiment 4 are shown in Table 4-1.

[0227] Table 4-1

[0228]

[0229]

[0230] The surface type parameters of the aspherical lens of the optical lens in Embodiment 4 are shown in Table 4-2.

[0231] Table 4-2

[0232] Surface Number K A B C D E F S12 1.15E+02 0.00E+00 -5.97E-03 -2.88E-05 -1.13E-04 1.47E-05 -1.51E-06 S13 7.51E-01 0.00E+00 -1.43E-03 -4.02E-04 5.18E-05 -4.20E-06 1.25E-07

[0233] In this embodiment, the field curvature curve, the F-Theta distortion curve, the relative luminance curve, the MTF curve, the axial aberration curve, and the off-axis chromatic aberration curve of the optical lens are shown in FIGS. Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28

[0234] ​Figure 23 The field curvature curve of embodiment 4 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 -0.03mm~0.06mm, which shows that the optical lens can well correct the field curvature.

[0235] Figure 24 The F-Theta distortion curve of embodiment 4 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 (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 -2%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0236] Figure 25 The relative luminance curve of embodiment 4 is shown, which represents the relative luminance value of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative luminance (unit: %). As can be seen from the figure, the relative luminance value of the optical lens is still greater than 50% at the maximum half field angle, which shows that the optical lens has good relative luminance.

[0237] 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 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 within the range of 0~160lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low frequency and high frequency conditions.

[0238] 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 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, which shows that the optical lens can well correct the axial aberration.

[0239] Figure 28The vertical color aberration curve of embodiment 4 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 -2 μm ~ 3 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.

[0240] Embodiment 5

[0241] Referring to Figure 29 , a structural schematic diagram of the optical lens provided in embodiment 5 of the present application is shown, and compared with 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.

[0242] The related parameters of each lens in the optical lens in embodiment 5 are shown in Table 5-1.

[0243] Table 5-1

[0244]

[0245]

[0246] The surface type parameters of the aspherical lens of the optical lens in embodiment 5 are shown in Table 5-2.

[0247] Table 5-2

[0248] Surface Number K A B C D E F S12 1.02E+02 0.00E+00 -6.25E-03 5.56E-04 -2.48E-04 3.05E-05 -1.68E-06 S13 1.43E+00 0.00E+00 -1.93E-03 7.65E-05 -3.74E-05 3.09E-06 -9.63E-08

[0249] In this embodiment, the field curvature curve, F-Theta distortion curve, relative luminance curve, MTF curve, axial aberration curve, and vertical color aberration curve of the optical lens are shown in Figure 30 , Figure 31 , Figure 32 , Figure 33 , Figure 34 , Figure 35 respectively.

[0250] Figure 30 The field curvature curve of embodiment 5 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 ~ 0.15 mm, which shows that the optical lens can well correct the field curvature.

[0251] Figure 31The F-Theta distortion curve of the embodiment 5 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 (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-10%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0252] Figure 32 The relative illumination curve of the embodiment 5 is shown, which represents the relative illumination values of different field angles on the imaging surface, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 50% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0253] 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 low frequency and high frequency conditions.

[0254] 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 surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within ±15 μm, which indicates that the optical lens can better correct the axial aberration.

[0255] Figure 35 The sagittal chromatic aberration curve of the embodiment 5 is shown, which represents the chromatic aberration of each wavelength at different image heights on the imaging surface 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~4 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 surface.

[0256] Embodiment 6

[0257] Please refer to Figure 36 , which is a structural schematic diagram of the optical lens provided in the embodiment 6 of the present application, and compared with the embodiment 2, the main difference is that the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0258] The related parameters of each lens in the optical lens in Embodiment 6 are shown in Table 6-1.

[0259] Table 6-1

[0260]

[0261]

[0262] The surface type parameters of the aspherical lenses of the optical lens in Embodiment 6 are shown in Table 6-2.

[0263] Table 6-2

[0264] Surface Number K A B C D E F S12 1.63E+01 0.00E+00 -3.34E-03 -2.13E-04 1.83E-05 -2.83E-06 8.83E-08 S13 2.71E+01 0.00E+00 -1.02E-03 -2.07E-04 2.26E-05 -1.61E-06 4.70E-08

[0265] 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

[0266] Figure 37 The field curvature curve of Embodiment 6 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: °). 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~0.09mm, which shows that the optical lens can well correct the field curvature.

[0267] Figure 38 The F-Theta distortion curve of Embodiment 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 (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 -8%~0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0268] Figure 39 The relative illumination curve of Embodiment 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 50% at the maximum half field angle, which shows that the optical lens has good relative illumination.

[0269] Figure 40 ​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. It can be seen from the figure that the MTF value of the embodiment is above 0.3 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.

[0270] Figure 41 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 surface, 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-6 μm-20 μm, which shows that the optical lens can better correct the axial aberration.

[0271] Figure 42 The curve of the embodiment 6 is shown, which represents the axial aberration of each wavelength on the optical axis at the imaging surface, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. It can be seen from the figure that the shift amount of the axial aberration is controlled within-6 μm-20 μm, which shows that the optical lens can better correct the axial aberration.

[0272] Embodiment 7

[0273] Please refer to Figure 43 , which is a structural schematic diagram of the optical lens provided in the embodiment 7 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.

[0274] 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;

[0275] The second lens L2 has a negative focal power, the object side S3 is a convex surface, and the image side S4 is a concave surface;

[0276] The third lens L3 has a positive focal power, the object side S5 and the image side S6 are both convex surfaces;

[0277] The fourth lens L4 has a negative focal power, the object side S7 and the image side S8 are both concave surfaces;

[0278] The stop ST;

[0279] The fifth lens L5 has negative refractive power, the object side S9 is a convex surface, and the image side S10 is a concave surface;

[0280] The sixth lens L6 has positive refractive power, the object side S10 and the image side S11 are both convex surfaces;

[0281] 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;

[0282] The seventh lens L7 has positive refractive power, the object side S12 is a convex surface, and the image side S13 is a concave surface;

[0283] The object side S14 and the image side S15 of the filter G1 are both flat surfaces;

[0284] The object side S16 and the image side S17 of the protective glass G2 are both flat surfaces;

[0285] The imaging surface S18 is a flat surface.

[0286] The related parameters of each lens in the optical lens in Example 7 are shown in Table 7-1.

[0287] Table 7-1

[0288]

[0289]

[0290] The surface type parameters of the aspherical lens of the optical lens in Example 7 are shown in Table 7-2.

[0291] Table 7-2

[0292] Surface Number K A B C D E F S12 1.77E-01 0.00E+00 -2.29E-04 3.24E-06 -3.11E-07 8.25E-09 -1.46E-10 S13 2.00E+02 0.00E+00 1.47E-03 -2.41E-05 5.05E-06 -2.58E-07 6.81E-09

[0293] In this embodiment, the field curvature curve, F-Theta distortion curve, relative luminance curve, MTF curve, axial aberration curve, and transverse chromatic aberration curve of the optical lens are shown in FIGS. Figure 44 、 Figure 45 、 Figure 46 、 Figure 47 、 Figure 48 、 Figure 49

[0294] Figure 44 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 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-0.12mm~0.04mm, which shows that the optical lens can well correct the field curvature. ​

[0295] Figure 45 F-Theta distortion curve of embodiment 7 is shown, 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 (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 -10%~0, the image compression in the edge angle region is relatively gentle, and the clarity of the expanded image is effectively improved.

[0296] Figure 46 The relative illumination curve of embodiment 7 is shown, which represents the relative illumination value of different field angles on the imaging plane, the horizontal axis represents the half field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 60% at the maximum half field angle, indicating that the optical lens has good relative illumination.

[0297] Figure 47 The MTF (Modulation Transfer Function) curve of embodiment 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 embodiment is above 0.3 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.

[0298] Figure 48 The axial aberration curve of embodiment 7 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -15 μm~18 μm, indicating that the optical lens can better correct the axial aberration.

[0299] Figure 49 The axial aberration curve of embodiment 7 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane, the horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the offset of the axial aberration is controlled within -15 μm~18 μm, indicating that the optical lens can better correct the axial aberration.

[0300] Embodiment 8

[0301] Please refer to Figure 50Figure 8 shows a structural schematic diagram of an optical lens provided in Embodiment 8 of the present application. Compared with Embodiment 2, the main difference is that the radius of curvature, lens thickness and other optical parameters of the lens surface are different.

[0302] The related parameters of the lenses in the optical lens in Embodiment 8 are shown in Table 8-1.

[0303] Table 8-1

[0304]

[0305]

[0306] The surface type parameters of the aspherical lens of the optical lens in Embodiment 8 are shown in Table 8-2.

[0307] Table 8-2

[0308] Surface Number K A B C D E F S12 3.27E+01 0.00E+00 -5.09E-03 -2.09E-04 -2.90E-05 2.32E-06 -4.88E-07 S13 1.37E+00 0.00E+00 -1.61E-03 -3.34E-04 3.67E-05 -2.96E-06 8.41E-08

[0309] 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 51 、 Figure 52 、 Figure 53 、 Figure 54 、 Figure 55 、 Figure 56

[0310] Figure 51 Figure 8 shows the field curvature curve of Embodiment 8, 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 the sagittal image surface is controlled within -0.03mm-0.09mm, which indicates that the optical lens can well correct the field curvature.

[0311] Figure 52 Figure 8 shows the F-Theta distortion curve of Embodiment 8, 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 (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 -2%-0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0312] Figure 53 ​The relative luminance curve of the embodiment 8 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 50% at the maximum half field angle, which indicates that the optical lens has good relative luminance.

[0313] Figure 54 The MTF (modulation transfer function) curve of the embodiment 8 is shown, which represents the lens imaging modulation degree of different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of the embodiment is above 0.4 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge field of view, and has good imaging quality and good detail resolution capability in low and high frequency cases.

[0314] Figure 55 The axial aberration curve of the embodiment 8 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-5 μm-15 μm, which indicates that the optical lens can better correct the axial aberration.

[0315] Figure 56 The axial aberration curve of the embodiment 8 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-5 μm-15 μm, which indicates that the optical lens can better correct the axial aberration.

[0316] Embodiment 9

[0317] Please refer to Figure 57 , which is a structural schematic diagram of the optical lens provided in the embodiment 9 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.

[0318] The related parameters of each lens in the optical lens in the embodiment 9 are shown in Table 9-1.

[0319] Table 9-1

[0320]

[0321]

[0322] The surface parameters of the aspherical lens of the optical lens in Example 9 are shown in Table 9-2.

[0323] Table 9-2

[0324] Surface Number K A B C D E F S12 -2.00E+02 0.00E+00 -3.27E-03 -2.01E-04 2.98E-05 -3.44E-06 1.40E-07 S13 1.32E+01 0.00E+00 -2.61E-03 -1.77E-04 2.66E-05 -2.37E-06 7.60E-08

[0325] 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. Figure 58 、 Figure 59 、 Figure 60 、 Figure 61 、 Figure 62 、 Figure 63

[0326] Figure 58 FIG. 9-3 shows the field curvature curve of Example 9, which represents the curvature of the 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: °). 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 ~ 0.06 mm, which indicates that the optical lens can well correct the field curvature.

[0327] Figure 59 FIG. 9-4 shows the F-Theta distortion curve of Example 9, 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 (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 -8% ~ 0, the image compression in the edge angle region is relatively flat, and the clarity of the expanded image is effectively improved.

[0328] Figure 60 FIG. 9-5 shows the relative illumination curve of Example 9, 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 70% at the maximum half field angle, which indicates that the optical lens has good relative illumination.

[0329] Figure 61 FIG. 9-6 shows the MTF (Modulation Transfer Function) curve of Example 9, 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 0.3 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 frequency and high frequency cases. ​

[0330] Figure 62 The axial aberration curve of the optical lens of Example 9 is shown in FIG. 9, which represents the aberration of the optical axis at the imaging plane at each wavelength, and 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 -30 μm ~ 15 μm, which shows that the optical lens can correct the axial aberration well.

[0331] Figure 63 The curve of the sagittal chromatic aberration of the optical lens of Example 9 is shown in FIG. 10, which represents the chromatic aberration at different image heights on the imaging plane at each wavelength relative to the central wavelength (0.55 μm), and 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 -4 μm ~ 5 μm, which shows that the optical lens can correct the chromatic aberration of the edge field and the secondary spectrum of the entire image plane very well.

[0332] Example 10

[0333] Please refer to Figure 64 , which is a structural schematic diagram of the optical lens provided in Example 10 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.

[0334] The related parameters of each lens in the optical lens of Example 10 are shown in Table 10-1.

[0335] Table 10-1

[0336]

[0337]

[0338] The surface type parameters of the aspherical lens of the optical lens of Example 10 are shown in Table 10-2.

[0339] Table 10-2

[0340] Surface Number K A B C D E F S12 2.00E+02 0.00E+00 -6.65E-03 -5.01E-04 1.29E-04 -2.57E-05 1.79E-06 S13 2.00E+02 0.00E+00 -5.42E-03 -2.33E-04 5.28E-05 -8.70E-06 5.55E-07

[0341] In this 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 65 、 Figure 66 、 Figure 67 、 Figure 68 、 Figure 69 、 Figure 70

[0342] Figure 65 ​The field curvature curve of embodiment 10 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: °). It can be seen from the figure that the field curvature of the meridional image surface and the sagittal image surface is controlled within -0.08mm~0.08mm, which shows that the optical lens can well correct the field curvature.

[0343] Figure 66 The F-Theta distortion curve of embodiment 10 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 (unit: %), and the vertical axis represents the half field angle (unit: °). It can be seen from the figure that the F-Theta 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 unfolded image is effectively improved.

[0344] Figure 67 The relative luminance curve of embodiment 10 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: %). It can be seen from the figure that the relative luminance value of the optical lens is still greater than 70% at the maximum half field angle, which shows that the optical lens has good relative luminance.

[0345] Figure 68 The MTF (Modulation Transfer Function) curve of embodiment 10 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 embodiment is above 0.3 within the full field of view, and within the range of 0~160lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low frequency and high frequency conditions.

[0346] Figure 69 The axial aberration curve of embodiment 10 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. It can be seen from the figure that the offset of the axial aberration is controlled within -15μm~18μm, which shows that the optical lens can well correct the axial aberration.

[0347] Figure 70The vertical color aberration curve of the embodiment 10 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 angle. As can be seen from the figure, the vertical color aberration of the longest wavelength and the shortest wavelength is controlled within -4 μm ~ 5 μm, which indicates that the optical lens can very well correct the color aberration of the edge field of view and the secondary spectrum of the entire image plane.

[0348] Referring to Table 11, the optical characteristics 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, and the maximum field angle FOV of the optical lens, and the numerical values corresponding to each conditional expression in the embodiments.

[0349] Table 11-1

[0350]

[0351]

[0352] Table 11-2

[0353] Parameter and Conditional Expression Example 6 Example 7 Example 8 Example 9 Example 10 f (mm) 3.18 3.23 2.94 3.55 3.21 FOV (°) 180.00 180.00 180.00 160.00 180.00 TTL (mm) 28.00 28.00 28.00 27.50 27.50 FNO 1.60 1.60 1.86 2.20 2.20 IH (mm) 9.20 9.20 9.20 9.20 9.20 TTL / f 8.79 8.67 9.54 7.75 8.56 TTL / IH 3.04 3.04 3.04 2.99 2.99 (IH / 2) / (f x θ) 0.92 0.91 1.00 0.93 0.91 FOV / FNO (°) 112.50 112.50 96.77 72.73 81.82 IH / EPD 4.62 4.56 5.83 5.70 6.30 IH / f 2.89 2.85 3.13 2.59 2.86 BFL / f 1.23 1.28 1.33 1.52 2.16 [f1 / f] -2.40 -2.54 -2.84 -3.85 -3.72 [f2 / f] -2.76 -3.71 -2.26 -1.81 -2.11 [f3 / f] 2.15 2.62 2.24 2.62 3.30 f4 / f -6.64 -3.09 -6.25 -281.78 -311.40 f5 / f -4.64 -5.08 -4.61 -2.42 -3.63 f6 / f 1.42 1.56 1.38 1.19 1.42 f7 / f 4.53 2.92 4.12 5.87 4.96 [CAT] [R1 / f]] 5.37 8.56 5.09 3.70 7.47 [R2 / f] 1.35 1.51 1.48 1.27 1.48 [R1 / R2] 3.99 5.66 3.44 2.91 5.06 [R3 / R4] -0.59 15.50 -2.25 -3.71 -2.77 (R1-R2) / (R1+R2) 0.60 0.70 0.55 0.49 0.67 (R3-R4) / (R3+R4) -3.91 0.88 2.60 1.74 2.13 CT3 / f 2.25 0.60 2.50 1.05 1.23 ∑CT / TTL 0.62 0.63 0.62 0.45 0.49

[0354] 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.

[0355] 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 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.

[0356] 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 skilled 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 application patent should be subject to the appended claims.

Claims

1. An optical lens comprising seven lenses, characterized in that, Along the optical axis from the object side to the imaging plane, the following are included in sequence: The first lens with negative optical power has a convex object side and a concave image side. A second lens with negative optical power has a concave image-side surface; A third lens with positive optical power has convex surfaces on both its object side and image side. A fourth lens with negative optical power; The fifth lens with negative optical power has a convex object side and a concave image side. The sixth lens has positive optical power and its object side is convex. The seventh lens, which has positive optical power, has a convex object-side surface; The fifth and sixth lenses are cemented together to form a cemented lens; The total optical length TTL of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 2.5 <TTL / IH<4.0。 2. The optical lens according to claim 1, characterized in that, The object-side radius of curvature R1 of the first lens and the image-side radius of curvature R2 of the first lens satisfy: 0.4 < (R1-R2) / (R1+R2) < 0.

8.

3. The optical lens according to claim 1, characterized in that, The radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: 2.5 <R1 / R2<6.0。 4. The optical lens according to claim 1, characterized in that, The radius of curvature R1 of the object-side surface of the first lens and the effective focal length f of the optical lens satisfy: 3.5 <R1 / f≤8.56。 5. The optical lens according to claim 1, characterized in that, The total optical length (TTL) and effective focal length (f) of the optical lens satisfy: 7.5 <TTL / f<11.0。 6. The optical lens according to claim 1, characterized in that, The total optical length TTL of the optical lens and the true image height IH corresponding to the maximum field of view satisfy the following condition: 2.99≤TTL / IH≤3.

44.

7. The optical lens according to claim 1, characterized in that, The effective focal length f of the optical lens, the radian of the maximum half field of view θ, and the true image height IH corresponding to the maximum field of view satisfy: 0.8 < (IH / 2) / (f×θ) < 1.

1.

8. The optical lens according to claim 1, characterized in that, The maximum field of view (FOV) and aperture value (FNO) of the optical lens satisfy: 70° <FOV / FNO<140°。 9. The optical lens according to claim 1, characterized in that, The true image height IH corresponding to the maximum field of view of the optical lens and the entrance pupil diameter EPD satisfy: 4.0 <IH / EPD<7.0。 10. The optical lens according to claim 1, characterized in that, The effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -5.5 <f1 / f<-2.0。

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