Optical lens

Abstract

The application provides an optical lens, which comprises six lenses in sequence from an object side to an imaging surface along an optical axis, and the six lenses comprise: a first lens with negative optical power; a second lens with positive optical power; a third lens with positive optical power, the image side of the third lens is a convex surface; a fourth lens with positive optical power, the object side of the fourth lens is a convex surface, and the image side of the fourth lens is a concave surface; a fifth lens with negative optical power, the image side of the fifth lens is a concave surface; and a sixth lens with negative optical power. 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 by optimizing the shape, optical power, thickness and spacing of each lens, so that the optical lens has one or more advantages such as small aperture, large image surface, miniaturization and long focal length.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the rapid development of automobile auxiliary driving technology, optical lenses are increasingly widely used in automobiles.

[0003] At present, higher requirements are put forward for the performance and structure of vehicle-mounted optical lenses for safety and other reasons. For example, due to the demand for updating iteration of the placement position of the lens, the installation position of the lens is limited, and the demand for miniaturization of the lens is increasingly intense. At the same time, the demand for large image surface and small aperture is also increasing, in order to realize high pixel requirements and improve the resolving power, seven, eight or more lens structures are usually selected, but this will seriously affect the miniaturization of the lens.

[0004] Therefore, how to make the optical lens realize large imaging size, small aperture, and long focal characteristics, so as to meet the performance requirements of vehicle-mounted applications, is the goal pursued by the lens in the field. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide an optical lens with one or more advantages such as small aperture, large image surface, miniaturization, long focal characteristics, etc.

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

[0007] a first lens with negative refractive power;

[0008] a second lens with positive refractive power;

[0009] a third lens with positive refractive power, the image side surface of which is convex;

[0010] a fourth lens with positive refractive power, the object side surface of which is convex and the image side surface of which is concave;

[0011] a fifth lens with negative refractive power, the image side surface of which is concave;

[0012] a sixth lens with negative refractive power.

[0013] Further preferably, the effective focal length f of the optical lens and the total optical length TTL satisfy: 1.5 < TTL / f < 2.5.

[0014] Further preferably, the effective focal length f of the optical lens, the maximum field of view FOV and the real image height IH corresponding to the maximum field of view satisfy: 0.95 < (IH / 2) / (f x Tan(FOV / 2)) < 1.05.

[0015] Further preferably, the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 0.6 < IH / f < 0.7.

[0016] Further preferably, the effective focal length f of the optical lens and the optical back focal length BFL satisfy: 0.2 < BFL / f < 0.5.

[0017] Further preferably, the real image height IH corresponding to the maximum field of view angle, the total track length TTL and the maximum field of view angle FOV of the optical lens satisfy: 50.0 < 180° x TTL / (IH / 2) / (FOV / 2) < 80.0.

[0018] Further preferably, the sum ∑CT of the central thicknesses of the first lens to the sixth lens and the total track length TTL of the optical lens satisfy: 0.5 < ∑CT / TTL < 0.85.

[0019] Further preferably, the maximum field of view angle FOV, the real image height IH corresponding to the maximum field of view angle and the entrance pupil diameter D1 of the first lens of the optical lens satisfy: 3.0 < D1 / IH / tan(FOV / 2) < 4.0.

[0020] Further preferably, the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -3.0 < f1 / f < -1.0.

[0021] Further preferably, the focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: 0.9 < f2 / f.

[0022] Further preferably, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 0.9 < f3 / f < 1.9.

[0023] Further preferably, the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 0.9 < f4 / f < 1.3.

[0024] Further preferably, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -1.2 < f5 / f < -0.5.

[0025] Further preferably, the focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: f6 / f < -1.5.

[0026] Further preferably, the effective focal length f of the optical lens and the image side surface curvature radius R6 of the third lens satisfy: -1.3 < R6 / f < -0.5.

[0027] It is further preferred that an effective focal length f of the optical lens and an image-side radius of curvature R10 of the fifth lens satisfy: 0.4 < R10 / f < 0.8.

[0028] It is further preferred that an object-side radius of curvature R7 and an image-side radius of curvature R8 of the fourth lens satisfy: -0.9 < (R7-R8) / (R7+R8) < -0.6.

[0029] 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 optimizing the shape, optical power, thickness, and spacing of each lens, so that the optical lens has one or more advantages such as small aperture, large image surface, miniaturization, long focal length, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0030] 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:

[0031] Figure 1 FIG. 1 is a structural schematic diagram of an optical lens according to an embodiment of the present application.

[0032] Figure 2 FIG. 2 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0033] Figure 3 FIG. 3 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0034] Figure 4 FIG. 4 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0035] Figure 5 FIG. 5 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0036] Figure 6 FIG. 6 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0037] Figure 7 FIG. 7 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0038] Figure 8 FIG. 8 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0039] Figure 9 FIG. 9 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0040] Figure 10 FIG. 10 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0041] Figure 11The structure diagram of the optical lens in the embodiment 6 of the present application.

[0042] Figure 12 The MTF curve diagram of the optical lens in the embodiment 6 of the present application.

[0043] Figure 13 The structure diagram of the optical lens in the embodiment 7 of the present application.

[0044] Figure 14 The MTF curve diagram of the optical lens in the embodiment 7 of the present application.

[0045] Figure 15 The structure diagram of the optical lens in the embodiment 8 of the present application.

[0046] Figure 16 The MTF curve diagram of the optical lens in the embodiment 8 of the present application.

[0047] Figure 17 The structure diagram of the optical lens in the embodiment 9 of the present application.

[0048] Figure 18 The MTF curve diagram of the optical lens in the embodiment 9 of the present application.

[0049] Figure 19 The structure diagram of the optical lens in the embodiment 10 of the present application.

[0050] Figure 20 The MTF curve diagram of the optical lens in the embodiment 10 of the present application.

[0051] Figure 21 The structure diagram of the optical lens in the embodiment 11 of the present application.

[0052] Figure 22 The MTF curve diagram of the optical lens in the embodiment 11 of the present application.

[0053] Figure 23 The structure diagram of the optical lens in the embodiment 12 of the present application.

[0054] Figure 24 The MTF curve diagram of the optical lens in the embodiment 12 of the present application.

[0055] Figure 25 The structure diagram of the optical lens in the embodiment 13 of the present application.

[0056] Figure 26 The MTF curve diagram of the optical lens in the embodiment 13 of the present application.

[0057] Figure 27 The structure diagram of the optical lens in the embodiment 14 of the present application.

[0058] Figure 28 MTF curve diagram of the optical lens in Embodiment 14 of the present application.

[0059] Figure 29 schematic structural diagram of the optical lens in Embodiment 15 of the present application.

[0060] Figure 30 MTF curve diagram of the optical lens in Embodiment 15 of the present application.

[0061] Figure 31 schematic structural diagram of the optical lens in Embodiment 16 of the present application.

[0062] Figure 32 MTF curve diagram of the optical lens in Embodiment 16 of the present application.

[0063] Figure 33 schematic structural diagram of the optical lens in Embodiment 17 of the present application.

[0064] Figure 34 MTF curve diagram of the optical lens in Embodiment 17 of the present application.

[0065] Figure 35 schematic structural diagram of the optical lens in Embodiment 18 of the present application.

[0066] Figure 36 MTF curve diagram of the optical lens in Embodiment 18 of the present application.

[0067] Figure 37 schematic structural diagram of the optical lens in Embodiment 19 of the present application.

[0068] Figure 38 MTF curve diagram of the optical lens in Embodiment 19 of the present application.

[0069] Figure 39 schematic structural diagram of the optical lens in Embodiment 20 of the present application.

[0070] Figure 40 MTF curve diagram of the optical lens in Embodiment 20 of the present application.

[0071] The following detailed description will further describe the present application with reference to the above-mentioned drawings. DETAILED DESCRIPTION

[0072] 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 in any way to limit the scope of the present application. Throughout the description, 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.

[0073] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one feature from another, and do not denote any limitation on the features. Thus, a 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.

[0074] 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.

[0075] Herein, 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.

[0076] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, when describing the embodiments of the present application, the use of "may" means that one or more embodiments of the present application. Also, the word "exemplary" is intended to mean an example or an illustration.

[0077] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0078] 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.

[0079] The optical lens provided by the embodiment of the present application comprises six lenses, which are sequentially arranged along the optical axis from the object side to the imaging surface as the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens.

[0080] In some embodiments, the first lens has a negative focal power, which is beneficial to diverging light rays, and under the condition of the same field of view angle, the light rays emitted from the image side of the first lens can make the subsequent optical system have a larger light ray acceptance surface, thereby reducing the front aperture.

[0081] In some embodiments, the second lens has a positive focal power, which is beneficial to converging light rays, and in combination with the first lens having a negative focal power, the total length of the optical lens can be reduced, and the converging effect of the light rays can further reduce the rear aperture.

[0082] In some embodiments, the third lens has a positive focal power, which is beneficial to receiving the light rays converged from the second lens, reduces the height of the light beam incident to the object side of the fourth lens, and reduces the aperture of the object side of the fourth lens. The image side of the third lens is a convex surface, which can make the edge field of view light rays be deflected towards the optical axis after passing through the image side of the third lens, thereby being beneficial to reducing the rear aperture of the system.

[0083] In some embodiments, the fourth lens has a positive focal power, which is beneficial to converging light rays, and in combination with the fifth lens, the aberration of the optical lens can be effectively corrected, the imaging quality can be improved, and the optical performance such as distortion can be optimized. The object side of the fourth lens is a convex surface, and the image side is a concave surface, which can reduce the angle between the incident light rays of the edge field of view and the normal of the surface of the object side, avoid light divergence, reduce sensitivity, and at the same time, make the edge field of view light rays have a higher height and a wider width when reaching the fifth lens, thereby improving the relative illumination of the edge field of view. The shape of the fourth lens is a crescent shape, and the difference between the changes of the two surfaces is small with temperature change, which is beneficial to realizing better thermal stability performance at high temperature.

[0084] In some embodiments, the fifth lens has a negative focal power, which is beneficial to diverging light rays, makes the subsequent optical system have a larger light ray acceptance surface, and improves the optical performance, which can effectively correct various aberrations caused by the front lens and improve the imaging quality of the optical lens. The image side of the fifth lens is a concave surface, which can diverge the central field of view light rays, so that the light rays can reach a higher imaging position, and at the same time, the incidence angle of the light rays entering the chip is reduced, which is helpful to improve the illumination and reduce the chromatic aberration.

[0085] In some embodiments, the sixth lens has a negative focal power, which is beneficial to diverging light rays, makes the peripheral light rays and the central light rays turn upward to reach a higher imaging position, and increases the imaging area of the optical lens.

[0086] In some embodiments, the optical lens can further include a diaphragm, which can be located between the first lens and the second lens. It can be understood that the diaphragm is used to limit the amount of light to change the brightness of the imaging. When the diaphragm is located between the first lens and the second lens, it is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture of the rear end of the optical system, and reduce the sensitivity of the optical lens. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in alternative embodiments, the diaphragm can also be arranged at other positions as needed.

[0087] In some embodiments, the optical lens can further include a filter and / or a protective glass arranged between the sixth lens and the imaging surface, which can filter light with different wavelengths and prevent damage to the image-side elements (for example, a chip) of the optical lens.

[0088] In some embodiments, the effective focal length f of the optical lens and the total optical length TTL satisfy: 1.5 < TTL / f < 2.5. Satisfying the above range means that the optical length of the optical lens can be effectively limited, which is beneficial to realize the miniaturization of the optical lens.

[0089] In some embodiments, the effective focal length f of the optical lens and the maximum field of view FOV and the real image height IH corresponding to the maximum field of view satisfy: 0.95 < (IH / 2) / (f x Tan(FOV / 2)) < 1.05. Satisfying the above range means that the optical distortion of the optical lens can be controlled within a small range, which is beneficial to improve the imaging quality of the optical lens.

[0090] 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 satisfy: 0.6 < IH / f < 0.7. Satisfying the above range means that the optical lens can achieve a larger imaging surface, which is beneficial to improve the imaging quality of the optical lens.

[0091] In some embodiments, the effective focal length f of the optical lens and the optical back focal length BFL satisfy: 0.2 < BFL / f < 0.5. Satisfying the above range means that the optical lens has a longer back focus, which is beneficial to reduce the assembly of the interference module and improve the production yield.

[0092] In some embodiments, the real image height IH corresponding to the maximum field of view of the optical lens, the total optical length TTL, and the maximum field of view FOV satisfy: 50.0 < 180° x TTL / (IH / 2) / (FOV / 2) < 80.0. Satisfying the above range can balance between large image height, long focal length, and miniaturization, and improve the imaging quality of the optical lens.

[0093] In some embodiments, a sum of central thicknesses of the first lens to the sixth lens ∑CT satisfies 0.5 < ∑CT / TTL < 0.85, where TTL is a total track length of the optical lens. The above range is beneficial to compress the total length and volume of the optical lens while maintaining the miniaturization of the optical lens.

[0094] In some embodiments, a maximum field of view FOV of the optical lens, a real image height IH corresponding to the maximum field of view, and an object-side aperture diameter D1 of the first lens satisfy 3.0 < D1 / IH / tan(FOV / 2) < 4.0. The above range is beneficial to balance the front aperture size and the field of view and the image surface of the optical lens, and to improve the imaging quality of the optical lens.

[0095] In some embodiments, a focal length f1 of the first lens and an effective focal length f of the optical lens satisfy -3.0 < f1 / f < -1.0. The above range is beneficial to diverge light rays, and the light rays emitted from the image side of the first lens can have a larger light acceptance surface for the subsequent optical system under the same field of view, thereby reducing the front aperture.

[0096] In some embodiments, a focal length f2 of the second lens and an effective focal length f of the optical lens satisfy 0.9 < f2 / f. The above range is beneficial to converge light rays, and the combination of the first lens with negative refractive power can further reduce the total length of the optical lens, and the converging effect of the light rays can further reduce the rear aperture.

[0097] In some embodiments, a focal length f3 of the third lens and an effective focal length f of the optical lens satisfy 0.9 < f3 / f < 1.9. The above range is beneficial to receive the light rays converged from the second lens, to reduce the height of the light beam incident to the object side of the fourth lens, and to reduce the aperture of the object side of the fourth lens.

[0098] In some embodiments, a focal length f4 of the fourth lens and an effective focal length f of the optical lens satisfy 0.9 < f4 / f < 1.3. The above range is beneficial to converge light rays, and the combination of the fourth lens and the fifth lens can effectively correct the aberration of the optical lens, improve the imaging quality, and optimize the optical performance such as distortion.

[0099] In some embodiments, a focal length f5 of the fifth lens and an effective focal length f of the optical lens satisfy -1.2 < f5 / f < -0.5. The above range is beneficial to diverge light rays, to make the subsequent optical system have a larger light acceptance surface, and to effectively correct various aberrations caused by the front lens, thereby improving the imaging quality of the optical lens.

[0100] In some embodiments, the focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: f6 / f<-1.5. Satisfying the above range is beneficial to diverging light rays, making peripheral light rays and central light rays turn up to a higher imaging position, and increasing the imaging area of the optical lens.

[0101] In some embodiments, the effective focal length f of the optical lens and the image-side radius of curvature R6 of the third lens satisfy: -1.3<R6 / f<-0.5. Satisfying the above range can make the edge field of view light rays deviate towards the optical axis after passing through the image-side surface of the third lens, which is beneficial to reducing the system back aperture.

[0102] In some embodiments, the effective focal length f of the optical lens and the image-side radius of curvature R10 of the fifth lens satisfy: 0.4<R10 / f<0.8. Satisfying the above range can diverge the central field of view light rays, so that the light rays can reach a higher imaging position, while reducing the incidence angle of the light rays into the chip, which helps to improve the illumination and reduce the chromatic aberration.

[0103] In some embodiments, the object-side radius of curvature R7 and the image-side radius of curvature R8 of the fourth lens satisfy: -0.9<(R7-R8) / (R7+R8)<-0.6. Satisfying the above range can reduce the angle between the edge field of view incident light rays and the object-side surface normal, avoid light ray divergence, reduce sensitivity, and at the same time make the edge field of view exit light rays higher in height and wider in width when reaching the fifth lens, thereby improving the relative illumination of the edge field of view.

[0104] In some embodiments, the fourth lens and the fifth lens can be cemented 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. In addition, the cemented lens can also reduce the assembly sensitivity of the optical lens, thereby reducing the processing difficulty of the optical lens and improving the assembly yield of the optical lens.

[0105] In some embodiments, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens can adopt spherical lenses or aspherical lenses. Compared with spherical structures, aspherical structures can effectively reduce the aberration of the optical system, thereby reducing the number of lenses and the size of the lenses, and better realizing lens miniaturization.

[0106] In various embodiments of the present application, when the lenses adopt aspherical lenses, the shape of each aspherical surface of the optical lens satisfies the following equation:

[0107]

[0108] Wherein, z is the distance of the curved surface and the curved surface vertex in the direction of the optical axis, h is the distance of the optical axis to the curved surface, c is the curvature of the curved surface vertex, K is the quadratic curved surface coefficient, A, B, C, D, E, F are the second order, fourth order, sixth order, eighth order, tenth order, twelfth order curved surface coefficients respectively.

[0109] 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 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.

[0110] Embodiment 1

[0111] Please refer to Figure 1 , which is a structural schematic diagram of the optical lens provided in the embodiment 1 of the application, the optical lens comprises in sequence from the object side to the imaging surface along the optical axis: the first lens L1, the diaphragm ST, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.

[0112] Wherein, the first lens L1 has negative focal power, the object side S1 is concave, and the image side S2 is convex; the second lens L2 has positive focal power, the object side S3 is concave, and the image side S4 is convex; the third lens L3 has positive focal power, the object side S5 and the image side S6 are both convex; the fourth lens L4 has positive focal power, the object side S7 is convex, and the image side S8 is concave; the fifth lens L5 has negative focal power, the object side S8 is convex, and the image side S9 is concave, and the fourth lens L4 and the fifth lens L5 form a cemented lens, and the cemented surface is S8; the sixth lens L6 has negative focal power, the object side S10 is concave, and the image side S11 is convex; the object side S12 and the image side S13 of the filter G1 are both flat; the imaging surface S14 is flat.

[0113] The first lens L1, the third lens L3, the fourth lens L4 and the fifth lens L5 are glass spherical lenses; the second lens

[0114] L2 and the sixth lens L6 are glass aspherical lenses.

[0115] The related parameters of each lens in the optical lens in the embodiment 1 are shown in table 1-1.

[0116] Table 1-1

[0117]

[0118] The surface shape parameters of the aspheric lens of the optical lens in Embodiment 1 are shown in Table 1-2.

[0119] Table 1-2

[0120] Face number K A B C D E F S3 4.05E+01 0.00E+00 0.00E+00 3.56E-06 1.04E-08 3.10E-10 -9.54E-12 S4 -5.01E+01 0.00E+00 0.00E+00 6.35E-06 -6.68E-08 2.56E-09 -2.66E-11 S10 -1.32E+00 0.00E+00 5.03E-03 -4.77E-05 -5.00E-06 2.21E-07 -3.18E-09 S11 -1.71E+00 0.00E+00 4.64E-03 2.94E-05 -5.45E-06 2.06E-07 -3.26E-09

[0121] In the present embodiment, Figure 2 The MTF (Modulation Transfer Function) curve of 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 present embodiment is above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has qualified imaging quality and qualified detail resolution ability in low and high frequency cases.

[0122] Embodiment 2

[0123] Please refer to Figure 3 , which is a structural schematic diagram of the optical lens provided in Embodiment 2 of the present application. Compared with Embodiment 1, the main difference of the present embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

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

[0125] Table 2-1

[0126]

[0127] The surface shape parameters of the aspheric lens of the optical lens in Embodiment 2 are shown in Table 2-2.

[0128] Table 2-2

[0129] Face number K A B C D E F S3 -3.95E+01 0.00E+00 0.00E+00 -5.44E-06 3.12E-07 -9.14E-09 1.04E-10 S4 9.22E-01 0.00E+00 0.00E+00 -6.20E-07 5.40E-08 -1.44E-09 1.55E-11 S10 1.38E+01 0.00E+00 -1.51E-03 6.21E-05 -6.97E-06 3.13E-07 -5.37E-09 S11 2.40E+00 0.00E+00 -1.28E-03 6.53E-05 -6.09E-06 2.68E-07 -4.09E-09

[0130] It can be seen from Figure 4 that the MTF value of the present embodiment is above 0.3 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has better imaging quality and better detail resolution ability in low and high frequency cases.

[0131] Embodiment 3

[0132] Please refer to Figure 5 , which is a structural schematic diagram of the optical lens provided in Embodiment 3 of the present application. Compared with Embodiment 1, the main difference of the present embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0133] The related parameters of each lens in the optical lens in Embodiment 3 are shown in Table 3-1.

[0134] Table 3-1

[0135]

[0136] The surface type parameters of the aspheric lens of the optical lens in Embodiment 3 are shown in Table 3-2.

[0137] Table 3-2

[0138] Face number K A B C D E F S3 -1.34E+00 0.00E+00 0.00E+00 -4.05E-06 3.08E-07 -9.54E-09 1.14E-10 S4 -4.94E+00 0.00E+00 0.00E+00 -4.73E-07 6.08E-08 -1.35E-09 1.27E-11 S10 7.15E+00 0.00E+00 -3.03E-04 -3.40E-05 6.48E-06 -2.71E-07 3.95E-09 S11 8.00E+01 0.00E+00 2.54E-04 -4.45E-05 7.68E-06 -3.05E-07 4.73E-09

[0139] It can be seen from Figure 6 that the MTF value of the embodiment is above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has qualified imaging quality and qualified detail resolution ability in low frequency and high frequency cases.

[0140] Embodiment 4

[0141] Please refer to Figure 7 , which is a structural schematic diagram of the optical lens provided in Embodiment 4 of the application. Compared with Embodiment 1, the main difference of the embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0142] The related parameters of each lens in the optical lens in Embodiment 4 are shown in Table 4-1.

[0143] Table 4-1

[0144]

[0145]

[0146] The surface type parameters of the aspheric lens of the optical lens in Embodiment 4 are shown in Table 4-2.

[0147] Table 4-2

[0148] Face number K A B C D E F S3 -2.47E-01 0.00E+00 0.00E+00 -4.01E-06 3.07E-07 -9.23E-09 1.07E-10 S4 -8.13E+00 0.00E+00 0.00E+00 8.45E-08 5.85E-08 -1.30E-09 1.27E-11 S11 7.05E+01 0.00E+00 -7.18E-04 -3.79E-05 6.57E-06 -2.62E-07 4.09E-09 S12 8.00E+01 0.00E+00 -3.98E-04 -4.57E-05 7.41E-06 -2.92E-07 4.68E-09

[0149] It can be seen from Figure 8 that the MTF value of the embodiment is above 0.3 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has better imaging quality and better detail resolution ability in low frequency and high frequency cases.

[0150] Embodiment 5

[0151] Please refer toFigure 9 The figure shown is a schematic diagram of the optical lens provided in Embodiment 5 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the lens is cemented, and the optical parameters such as the radius of curvature and lens thickness of each lens surface are different.

[0152] The relevant parameters of each lens in the optical lens of Example 5 are shown in Table 5-1.

[0153] Table 5-1

[0154]

[0155]

[0156] The surface profile parameters of the aspherical lens in Example 5 are shown in Table 5-2.

[0157] Table 5-2

[0158] Face number K A B C D E F S3 -2.17E-01 0.00E+00 0.00E+00 -4.21E-06 3.07E-07 -9.01E-09 1.01E-10 S4 -1.43E+01 0.00E+00 0.00E+00 4.89E-07 5.54E-08 -1.34E-09 1.33E-11 S11 -8.00E+01 0.00E+00 -9.38E-04 -4.03E-05 6.78E-06 -2.53E-07 3.52E-09 S12 3.77E+01 0.00E+00 -7.76E-04 -4.69E-05 7.53E-06 -2.83E-07 4.15E-09

[0159] from Figure 10 As can be seen, the MTF value of this embodiment is above 0.2 throughout the entire field of view. In the range of 0 to 120 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view. It has qualified imaging quality and qualified detail resolution in both low and high frequency conditions.

[0160] Example 6

[0161] Please see Figure 11 The figure shown is a schematic diagram of the structure of the optical lens provided in Embodiment 6 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0162] The relevant parameters of each lens in the optical lens of Example 6 are shown in Table 6-1.

[0163] Table 6-1

[0164]

[0165]

[0166] The surface profile parameters of the aspherical lens in Example 6 are shown in Table 6-2.

[0167] Table 6-2

[0168] Face number K A B C D E F S3 -4.38E+00 0.00E+00 0.00E+00 -5.62E-06 2.71E-07 -7.38E-09 6.91E-11 S4 2.01E+01 0.00E+00 0.00E+00 -1.25E-06 3.86E-08 -8.49E-10 6.19E-12 S10 -9.52E-01 0.00E+00 -1.87E-03 3.45E-05 -7.28E-06 3.67E-07 -5.49E-09 S11 -7.14E-01 0.00E+00 -1.74E-03 3.00E-05 -6.49E-06 3.94E-07 -6.50E-09

[0169] from Figure 12It can be seen from the MTF curves in the full field of view that the MTF values of the optical lens provided in the embodiment are all above 0.3, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and the imaging quality and the detail resolution capability are good in both low frequency and high frequency cases.

[0170] Embodiment 7

[0171] Please refer to Figure 13 , which is a structural schematic diagram of the optical lens provided in the embodiment 7 of the present application, and compared with the embodiment 1, the main difference of the embodiment 7 is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0172] The related parameters of each lens in the optical lens in the embodiment 7 are shown in Table 7-1.

[0173] Table 7-1

[0174]

[0175] The surface type parameters of the aspherical lens of the optical lens in the embodiment 7 are shown in Table 7-2.

[0176] Table 7-2

[0177] Face number K A B C D E F S3 -3.52E+00 0.00E+00 0.00E+00 -5.72E-06 2.59E-07 -7.61E-09 7.83E-11 S4 1.43E+01 0.00E+00 0.00E+00 -1.40E-06 2.54E-08 -6.60E-10 5.32E-12 S10 -2.12E+00 0.00E+00 2.60E-03 -9.93E-05 5.37E-06 -2.56E-07 4.83E-09 S11 -3.87E+00 0.00E+00 2.98E-03 -7.50E-05 6.07E-06 -3.08E-07 5.81E-09

[0178] From Figure 14 , it can be seen that the MTF values of the optical lens provided in the embodiment are all above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and the imaging quality and the detail resolution capability are qualified in both low frequency and high frequency cases.

[0179] Embodiment 8

[0180] Please refer to Figure 15 , which is a structural schematic diagram of the optical lens provided in the embodiment 8 of the present application, and compared with the embodiment 1, the main difference of the embodiment 8 is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0181] The related parameters of each lens in the optical lens in the embodiment 8 are shown in Table 8-1.

[0182] Table 8-1

[0183]

[0184] The surface type parameters of the aspherical lens of the optical lens in the embodiment 8 are shown in Table 8-2.

[0185] Table 8-2

[0186]

[0187]

[0188] As can be seen from Figure 16 , the MTF value of the embodiment is above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has qualified imaging quality and qualified detail resolution capability in the case of low frequency and high frequency.

[0189] Embodiment 9

[0190] Please refer to Figure 17 , which is a structural schematic diagram of the optical lens provided in the embodiment 9 of the present application, and 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.

[0191] The related parameters of each lens in the optical lens in the embodiment 9 are shown in Table 9-1.

[0192] Table 9-1

[0193]

[0194] The surface type parameters of the aspheric lens of the optical lens in the embodiment 9 are shown in Table 9-2.

[0195] Table 9-2

[0196] Face number K A B C D E F S3 -5.65E+00 0.00E+00 0.00E+00 -6.04E-06 2.06E-07 -6.10E-09 5.63E-11 S4 1.16E+01 0.00E+00 0.00E+00 -1.19E-06 1.20E-08 -2.76E-10 2.67E-12 S10 -9.52E-01 0.00E+00 2.54E-03 -7.01E-05 4.35E-06 -2.05E-07 3.50E-09 S11 -2.02E+00 0.00E+00 2.86E-03 -7.52E-05 6.42E-06 -2.84E-07 4.62E-09

[0197] As can be seen from Figure 18 , the MTF value of the embodiment is above 0.3 in the full field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has better imaging quality and better detail resolution capability in the case of low frequency and high frequency.

[0198] Embodiment 10

[0199] Please refer to Figure 19 , which is a structural schematic diagram of the optical lens provided in the embodiment 10 of the present application, and 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.

[0200] The related parameters of each lens in the optical lens in the embodiment 10 are shown in Table 10-1.

[0201] Table 10-1

[0202]

[0203] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 10 are shown in Table 10-2.

[0204] Table 10-2

[0205] Face number K A B C D E F S3 -4.99E+01 0.00E+00 0.00E+00 -5.84E-06 3.03E-07 -9.21E-09 1.11E-10 S4 2.43E+00 0.00E+00 0.00E+00 -6.94E-07 5.60E-08 -1.40E-09 1.45E-11 S10 1.37E+01 0.00E+00 -1.59E-03 6.05E-05 -6.97E-06 3.13E-07 -5.37E-09 S11 2.40E+00 0.00E+00 -1.30E-03 6.48E-05 -6.09E-06 2.69E-07 -4.04E-09

[0206] It can be seen from Figure 20 that the MTF values of the present embodiment are all above 0.3 in the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in both low and high frequency cases.

[0207] Embodiment 11

[0208] Referring to Figure 21 , a structural schematic diagram of the optical lens provided in Embodiment 11 of the present application is shown, and the present embodiment mainly differs from Embodiment 1 in that the optical parameters such as the radii of curvature of the surfaces of the lenses and the lens thicknesses are different.

[0209] The related parameters of the lenses in the optical lens in Embodiment 11 are shown in Table 11-1.

[0210] Table 11-1

[0211]

[0212] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 11 are shown in Table 11-2.

[0213] Table 11-2

[0214] Face number K A B C D E F S3 -2.71E+00 0.00E+00 0.00E+00 -4.33E-06 2.99E-07 -9.44E-09 1.14E-10 S4 -4.91E+00 0.00E+00 0.00E+00 -7.98E-07 5.55E-08 -1.32E-09 1.22E-11 S10 6.29E+00 0.00E+00 -9.97E-04 -2.36E-05 6.99E-06 -2.73E-07 3.61E-09 S11 8.00E+01 0.00E+00 -3.63E-04 -3.67E-05 8.24E-06 -3.05E-07 4.45E-09

[0215] It can be seen from Figure 22 that the MTF values of the present embodiment are all above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have qualified imaging quality and qualified detail resolution ability in both low and high frequency cases.

[0216] Embodiment 12

[0217] Referring to Figure 23 , a structural schematic diagram of the optical lens provided in Embodiment 12 of the present application is shown, and the present embodiment mainly differs from Embodiment 1 in that the optical parameters such as the radii of curvature of the surfaces of the lenses and the lens thicknesses are different.

[0218] The related parameters of the lenses in the optical lens in Embodiment 12 are shown in Table 12-1.

[0219] Table 12-1

[0220]

[0221]

[0222] The surface profile parameters of the aspherical lens of the optical lens in Embodiment 12 are shown in Table 12-2.

[0223] Table 12-2

[0224] Face number K A B C D E F S3 -9.67E-01 0.00E+00 0.00E+00 -4.33E-06 3.06E-07 -9.01E-09 1.03E-10 S4 -1.54E+01 0.00E+00 0.00E+00 3.80E-07 5.48E-08 -1.32E-09 1.39E-11 S11 -8.00E+01 0.00E+00 -1.24E-03 -4.39E-05 6.84E-06 -2.48E-07 3.43E-09 S12 3.45E+01 0.00E+00 -1.05E-03 -5.34E-05 7.80E-06 -2.77E-07 3.66E-09

[0225] It can be seen from Figure 24 that the MTF values of the present embodiment are all above 0.3 within the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in both low and high frequency cases.

[0226] Embodiment 13

[0227] Please refer to Figure 25 , which is a structural schematic diagram of the optical lens provided in Embodiment 13 of the present application. Compared with Embodiment 1, the main difference of the present embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0228] The related parameters of each lens in the optical lens in Embodiment 13 are shown in Table 13-1.

[0229] Table 13-1

[0230]

[0231]

[0232] The surface profile parameters of the aspherical lens of the optical lens in Embodiment 13 are shown in Table 13-2.

[0233] Table 13-2

[0234] Face number K A B C D E F S3 -1.97E+00 0.00E+00 0.00E+00 -4.13E-06 3.00E-07 -9.34E-09 1.13E-10 S4 -6.94E+00 0.00E+00 0.00E+00 -3.50E-07 5.41E-08 -1.22E-09 1.16E-11 S10 8.00E+01 0.00E+00 -1.34E-03 -3.89E-05 6.85E-06 -2.51E-07 3.36E-09 S11 -8.00E+01 0.00E+00 -7.81E-04 -4.47E-05 7.88E-06 -2.86E-07 4.13E-09

[0235] It can be seen from Figure 26 that the MTF values of the present embodiment are all above 0.3 within the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in both low and high frequency cases.

[0236] Embodiment 14

[0237] Please refer to Figure 27Figure 14 shows a structural schematic diagram of an optical lens provided in Embodiment 14 of the present application; compared with Embodiment 1, the main difference of the present embodiment lies in the arrangement of the aspheric lens, and the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0238] The related parameters of each lens in the optical lens in Embodiment 14 are shown in Table 14-1.

[0239] Table 14-1

[0240]

[0241]

[0242] The surface type parameters of the aspheric lens of the optical lens in Embodiment 14 are shown in Table 14-2.

[0243] Table 14-2

[0244] Face number K A B C D E F S3 -4.55E+00 0.00E+00 0.00E+00 -5.68E-06 2.70E-07 -7.37E-09 7.13E-11 S4 1.97E+01 0.00E+00 0.00E+00 -1.19E-06 4.08E-08 -8.22E-10 5.81E-12 S10 -9.02E-01 0.00E+00 -1.85E-03 3.53E-05 -7.26E-06 3.68E-07 -5.50E-09 S11 -6.85E-01 0.00E+00 -1.72E-03 3.07E-05 -6.49E-06 3.94E-07 -6.45E-09

[0245] It can be seen from Figure 28 that the MTF value of the present embodiment is above 0.3 in the full field of view, and in the range of 0-120 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 the case of low frequency and high frequency.

[0246] Embodiment 15

[0247] Please refer to Figure 29 Figure 15 shows a structural schematic diagram of an optical lens provided in Embodiment 15 of the present application; compared with Embodiment 1, the main difference of the present embodiment lies in the optical parameters such as the radius of curvature of each lens surface and the lens thickness.

[0248] The related parameters of each lens in the optical lens in Embodiment 15 are shown in Table 15-1.

[0249] Table 15-1

[0250]

[0251]

[0252] The surface type parameters of the aspheric lens of the optical lens in Embodiment 15 are shown in Table 15-2.

[0253] Table 15-2

[0254] Face number K A B C D E F S3 -2.64E+00 0.00E+00 0.00E+00 -6.25E-06 -1.52E-07 2.23E-09 -2.43E-11 S4 -1.43E+00 0.00E+00 0.00E+00 -8.02E-06 2.07E-08 -2.18E-10 2.99E-11 S10 -9.32E-01 0.00E+00 -3.86E-03 6.75E-06 2.84E-06 -1.42E-08 -9.61E-10 S11 -1.70E+00 0.00E+00 -3.13E-03 3.62E-05 3.61E-06 -9.02E-08 7.58E-10

[0255] It can be seen from Figure 30As can be seen, the MTF value of this embodiment is above 0.4 throughout the entire field of view. In the range of 0 to 120 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, and it has good imaging quality and good detail resolution in both low and high frequency conditions.

[0256] Example 16

[0257] Please see Figure 31 The figure shown is a schematic diagram of the optical lens provided in Embodiment 16 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0258] The relevant parameters of each lens in the optical lens of Example 16 are shown in Table 16-1.

[0259] Table 16-1

[0260]

[0261] The surface profile parameters of the aspherical lens in the optical lens of Example 16 are shown in Table 16-2.

[0262] Table 16-2

[0263] Face number K A B C D E F S3 -1.92E+00 0.00E+00 0.00E+00 -7.91E-06 -3.05E-07 2.28E-09 -2.69E-11 S4 -5.71E-01 0.00E+00 0.00E+00 -1.14E-05 -9.69E-08 -1.42E-09 1.29E-10 S10 -1.71E+00 0.00E+00 3.36E-03 -2.24E-05 -3.88E-06 1.19E-07 -9.45E-10 S11 -2.86E+00 0.00E+00 3.99E-03 2.94E-06 -1.79E-06 1.45E-08 6.06E-10

[0264] from Figure 32 As can be seen, the MTF value of this embodiment is above 0.3 throughout the entire field of view. In the range of 0 to 120 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view. It has good imaging quality and good detail resolution in both low and high frequency conditions.

[0265] Example 17

[0266] Please see Figure 33 The figure shown is a schematic diagram of the optical lens provided in Embodiment 17 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0267] The relevant parameters of each lens in the optical lens of Example 17 are shown in Table 17-1.

[0268] Table 17-1

[0269]

[0270] The surface profile parameters of the aspherical lens in the optical lens of Example 17 are shown in Table 17-2.

[0271] Table 17-2

[0272]

[0273]

[0274] From Figure 34 It can be seen from the table that the MTF value of the optical lens provided in the embodiment 18 is above 0.3 in the whole field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and in the low frequency and high frequency cases, the imaging quality and the detail resolution capability are both good.

[0275] Embodiment 18

[0276] Please refer to Figure 35 , which is a structural schematic diagram of the optical lens provided in the embodiment 18 of the present application, and compared with the embodiment 1, the main difference of the embodiment 18 is that the optical parameters such as the radius of curvature of the lens surface and the lens thickness are different.

[0277] The related parameters of each lens in the optical lens in the embodiment 18 are shown in Table 18-1.

[0278] Table 18-1

[0279]

[0280] The surface type parameters of the aspherical lens of the optical lens in the embodiment 18 are shown in Table 18-2.

[0281] Table 18-2

[0282] Face number K A B C D E F S3 -4.71E+00 0.00E+00 0.00E+00 -5.54E-06 6.30E-08 -2.00E-09 -1.97E-12 S4 4.65E+01 0.00E+00 0.00E+00 -1.80E-06 -5.16E-08 8.27E-10 -4.62E-12 S10 6.13E+00 0.00E+00 -1.84E-03 -2.50E-05 3.29E-06 8.24E-08 -4.11E-09 S11 5.06E+01 0.00E+00 -1.26E-03 -6.83E-06 3.53E-06 -3.61E-08 1.14E-10

[0283] From Figure 36 It can be seen from the table that the MTF value of the optical lens provided in the embodiment 18 is above 0.3 in the whole field of view, and in the range of 0-120 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and in the low frequency and high frequency cases, the imaging quality and the detail resolution capability are both good.

[0284] Embodiment 19

[0285] Please refer to Figure 37 , which is a structural schematic diagram of the optical lens provided in the embodiment 19 of the present application, and compared with the embodiment 1, the main difference of the embodiment 19 is that the optical parameters such as the radius of curvature of the lens surface and the lens thickness are different.

[0286] The related parameters of each lens in the optical lens in the embodiment 19 are shown in Table 19-1.

[0287] Table 19-1

[0288]

[0289] The surface profile parameters of the aspherical lens of the optical lens in Embodiment 19 are shown in Table 19-2.

[0290] Table 19-2

[0291] Face number K A B C D E F S3 -5.47E+00 0.00E+00 0.00E+00 -6.90E-06 5.70E-08 -1.45E-09 -1.90E-11 S4 2.33E+01 0.00E+00 0.00E+00 -2.71E-06 -8.40E-08 1.48E-09 -8.95E-12 S10 2.79E+01 0.00E+00 -1.07E-03 9.51E-06 -2.73E-06 4.03E-08 4.63E-09 S11 8.02E+01 0.00E+00 -3.26E-04 -2.02E-05 1.22E-06 -8.06E-08 3.60E-09

[0292] It can be seen from Figure 38 that the MTF values of the present embodiment are all above 0.2 in the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have qualified imaging quality and qualified detail resolution ability in both low and high frequency cases.

[0293] Embodiment 20

[0294] Please refer to Figure 39 , which is a structural schematic diagram of the optical lens provided in Embodiment 20 of the present application. Compared with Embodiment 1, the main difference is that the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different.

[0295] The related parameters of the lenses in the optical lens in Embodiment 20 are shown in Table 20-1.

[0296] Table 20-1

[0297]

[0298] The surface profile parameters of the aspherical lens of the optical lens in Embodiment 20 are shown in Table 20-2.

[0299] Table 20-2

[0300] Face number K A B C D E F S3 -4.34E+00 0.00E+00 0.00E+00 -3.00E-06 7.61E-08 -2.79E-09 2.12E-11 S4 -5.06E+01 0.00E+00 0.00E+00 2.81E-06 -7.44E-08 6.92E-10 -2.71E-12 S10 1.45E+01 0.00E+00 -4.30E-04 -1.27E-05 -1.11E-06 6.34E-08 -8.86E-10 S11 8.00E+01 0.00E+00 8.23E-05 -3.12E-05 9.37E-07 -1.30E-08 4.00E-10

[0301] It can be seen from Figure 40 that the MTF values of the present embodiment are all above 0.3 in the full field of view, and in the range of 0-120 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have better imaging quality and better detail resolution ability in both low and high frequency cases.

[0302] Please refer to Table 21 for 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 values corresponding to each conditional expression in each embodiment.

[0303] Table 21

[0304]

[0305]

[0306] Table 21

[0307]

[0308]

[0309] Table 21

[0310]

[0311]

[0312] Table 21

[0313]

[0314] In summary of the above embodiments, 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 optimizing the shape, optical power, thickness, and spacing of each lens, so that the optical lens has one or more advantages such as small aperture, large image surface, miniaturization, long focal length, and the like.

[0315] 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.

[0316] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An optical lens, six pieces of lenses in total, characterized in that, In order from the object side to the imaging plane along the optical axis, the optical lens comprises in sequence: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with positive refractive power, the image side surface of which is convex; a fourth lens with positive refractive power, the object side surface of which is convex and the image side surface of which is concave; a fifth lens with negative refractive power, the image side surface of which is concave; a sixth lens with negative refractive power; The effective focal length f of the optical lens and the total track length TTL satisfy: 1.5 < TTL / f < 2.

5. The object side surface curvature radius R7 and the image side surface curvature radius R8 of the fourth lens satisfy: -0.9 < (R7-R8) / (R7+R8) < -0.

6.

2. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the total track length TTL satisfy: 1.76 ≤ TTL / f ≤ 2.

36.

3. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: 0.6 < IH / f < 0.

7.

4. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the optical back focal length BFL satisfy: 0.2 < BFL / f < 0.

5.

5. The optical lens of claim 1, wherein, The real image height IH corresponding to the maximum field of view, the total track length TTL and the maximum field of view FOV of the optical lens satisfy: 50.0 < 180°×TTL / (IH / 2) / (FOV / 2) < 80.

0.

6. The optical lens of claim 1, wherein, The sum ∑CT of the central thicknesses of the first lens to the sixth lens and the total track length TTL of the optical lens satisfy: 0.5 < ∑CT / TTL < 0.

85.

7. The optical lens of claim 1, wherein, The maximum field of view FOV, the real image height IH corresponding to the maximum field of view and the object side surface aperture diameter D1 of the first lens of the optical lens satisfy: 3.0 < D1 / IH / tan(FOV / 2) < 4.

0.

8. The optical lens of claim 1, wherein, The focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: 0.9 < f2 / f ≤ 6.

88.

9. The optical lens of claim 1, wherein, The focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: -6.69 ≤ f6 / f < -1.

5.

10. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the image side surface curvature radius R6 of the third lens satisfy: -1.3 < R6 / f < -0.

5.

11. The optical lens of claim 1, wherein, The object side surface curvature radius R7 and the image side surface curvature radius R8 of the fourth lens satisfy: -0.85 ≤ (R7-R8) / (R7+R8) ≤ -0.7.

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