Optical lens

Abstract

The application provides an optical lens, which comprises seven lenses arranged along an optical axis from an object side to an imaging surface in sequence, wherein the seven lenses are: a first lens with negative optical power, the object side of which is a concave surface; a second lens with positive optical power, the image side of which is a convex surface; a third lens with negative optical power, the object side of which is a concave surface; a fourth lens with positive optical power; a fifth lens with negative optical power, the image side of which is a concave surface; a sixth lens with positive optical power, the object side of which is a convex surface and the image side of which is a convex surface; and a seventh lens with negative optical power. The application realizes the effects of large field of view, large aperture and miniaturization by reasonably matching the lens shapes and optical power combinations of the lenses.

Description

TECHNICAL FIELD

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

[0002] With the increasing demand for driving experience, vehicle application type optical lenses are increasingly used in intelligent driving, and vehicle optical lenses are playing an increasingly important role in the automotive industry.

[0003] The intelligent cabin is also known as the intelligent automobile occupant monitoring system (OMS), which is to ensure the safety of the driver and also to ensure the safety of the passengers and the driving experience in the car. In addition to the safety problem in the cabin, the passenger's driving experience is one of the meanings of the intelligent cabin. The intelligent automobile occupant monitoring system (OMS) on the market requires a larger field of view and higher optical performance, so a full glass structure is often used and the volume is large, which is not conducive to the integration of optical lenses and the reduction of cost. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide an optical lens which can at least solve one or more of the above problems.

[0005] To achieve the above purpose, the present application provides an optical lens, which has seven lenses, arranged along the optical axis from the object side to the imaging surface in order: a first lens with negative focal power, the object side surface of which is concave; a second lens with positive focal power, the image side surface of which is convex; a third lens with negative focal power, the object side surface of which is concave; a fourth lens with positive focal power; a fifth lens with negative focal power, the image side surface of which is concave; a sixth lens with positive focal power, the object side surface of which is convex and the image side surface of which is convex; and a seventh lens with negative focal power.

[0006] In some embodiments, the fifth lens and the sixth lens are cemented to form a cemented lens.

[0007] In some embodiments, a diaphragm is arranged between the third lens and the fourth lens.

[0008] In some embodiments, the total optical length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL / f < 6.0.

[0009] In some embodiments, the total optical length TTL of the optical lens and the image height IH corresponding to the maximum field of view of the optical lens satisfy: TTL / IH < 2.8.

[0010] In some embodiments, the effective focal length f of the optical lens, the maximum field angle FOV of the optical lens, and the image height IH corresponding to the maximum field angle FOV of the optical lens satisfy: 55.0 < f*FOV / IH < 95.0.

[0011] In some embodiments, the object-side half-aperture diameter d1 of the first lens and the image height IH corresponding to the maximum field angle FOV of the optical lens satisfy: 0.9 < d1 / IH < 1.8.

[0012] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -1.2.

[0013] In some embodiments, the effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: f3 / f < -1.5.

[0014] In some embodiments, the effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7 / f < -0.4.

[0015] In some embodiments, 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: R1 / f < -3.5.

[0016] In some embodiments, the radius of curvature R4 of the image-side surface of the second lens and the effective focal length f of the optical lens satisfy: -3.5 < R4 / f < -1.0; and the radius of curvature R5 of the object-side surface of the third lens and the effective focal length f of the optical lens satisfy: -10.0 < R5 / f < -0.4.

[0017] In some embodiments, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R5 of the object-side surface of the third lens satisfy: 0 < |(R4-R5) / (R4+R5)| < 0.8.

[0018] In some embodiments, the radius of curvature R12 of the image-side surface of the sixth lens and the effective focal length f of the optical lens satisfy: -4.5 < R12 / f < -0.5.

[0019] In some embodiments, the object-side half-aperture sagittal height Sag3 of the second lens and the object-side half-aperture diameter d3 of the second lens satisfy: -0.18 < Sag3 / d3 < -0.02.

[0020] In some embodiments, the image-side half-aperture sagittal height Sag4 of the second lens and the image-side half-aperture diameter d4 of the second lens satisfy: -0.25 < Sag4 / d4 < -0.05.

[0021] In some embodiments, a sum of central thicknesses of each lens of the first lens to the seventh lens, ∑CT, and a total optical length of the optical lens, TTL, satisfy: 0.60 < ∑CT / TTL < 0.80.

[0022] Compared with the prior art, the beneficial effects of the present application are: the optical lens provided by the present application adopts seven lenses with optical power, and by reasonably matching the optical power and surface shape of each lens, the optical lens has a compact structure while having good imaging quality; at the same time, by reasonably setting the stop position, lens thickness and lens spacing, the optical lens has a large field of view and a large aperture, realizes the balance of large field of view, large aperture, miniaturization and high pixel, and can meet the camera requirements of vehicle-mounted lenses. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of an optical lens according to an embodiment of the present application.

[0024] Figure 2 FIG. 2 is a field curvature curve diagram of the optical lens according to the embodiment of the present application.

[0025] Figure 3 FIG. 3 is a relative luminance curve diagram of the optical lens according to the embodiment of the present application.

[0026] Figure 4 FIG. 4 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0027] Figure 5 FIG. 5 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0028] Figure 6 FIG. 6 is a field curvature curve diagram of the optical lens according to the embodiment of the present application.

[0029] Figure 7 FIG. 7 is a relative luminance curve diagram of the optical lens according to the embodiment of the present application.

[0030] Figure 8 FIG. 8 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0031] Figure 9 FIG. 9 is a structural schematic diagram of an optical lens according to another embodiment of the present application.

[0032] Figure 10 FIG. 10 is a field curvature curve diagram of the optical lens according to the embodiment of the present application.

[0033] Figure 11 FIG. 11 is a relative luminance curve diagram of the optical lens according to the embodiment of the present application.

[0034] Figure 12 FIG. 12 is an MTF curve diagram of the optical lens according to the embodiment of the present application.

[0035] Figure 13 Structure diagram of the optical lens of embodiment 4 of the present application.

[0036] Figure 14 Field curvature curve of the optical lens of embodiment 4 of the present application.

[0037] Figure 15 Relative luminance curve of the optical lens of embodiment 4 of the present application.

[0038] Figure 16 MTF curve of the optical lens of embodiment 4 of the present application.

[0039] Figure 17 Structure diagram of the optical lens of embodiment 5 of the present application.

[0040] Figure 18 Field curvature curve of the optical lens of embodiment 5 of the present application.

[0041] Figure 19 Relative luminance curve of the optical lens of embodiment 5 of the present application.

[0042] Figure 20 MTF curve of the optical lens of embodiment 5 of the present application.

[0043] Figure 21 Structure diagram of the optical lens of embodiment 6 of the present application.

[0044] Figure 22 Field curvature curve of the optical lens of embodiment 6 of the present application.

[0045] Figure 23 Relative luminance curve of the optical lens of embodiment 6 of the present application.

[0046] Figure 24 MTF curve of the optical lens of embodiment 6 of the present application.

[0047] Figure 25 Structure diagram of the optical lens of embodiment 7 of the present application.

[0048] Figure 26 Field curvature curve of the optical lens of embodiment 7 of the present application.

[0049] Figure 27 Relative luminance curve of the optical lens of embodiment 7 of the present application.

[0050] Figure 28 MTF curve of the optical lens of embodiment 7 of the present application.

[0051] Figure 29A structural schematic diagram of the optical lens of embodiment 8 of the present application.

[0052] Figure 30 A field curvature curve of the optical lens of embodiment 8 of the present application.

[0053] Figure 31 A relative luminance curve of the optical lens of embodiment 8 of the present application.

[0054] Figure 32 An MTF curve of the optical lens of embodiment 8 of the present application.

[0055] Figure 33 A structural schematic diagram of the optical lens of embodiment 9 of the present application.

[0056] Figure 34 A field curvature curve of the optical lens of embodiment 9 of the present application.

[0057] Figure 35 A relative luminance curve of the optical lens of embodiment 9 of the present application.

[0058] Figure 36 An MTF curve of the optical lens of embodiment 9 of the present application.

[0059] Figure 37 A structural schematic diagram of the optical lens of embodiment 10 of the present application.

[0060] Figure 38 A field curvature curve of the optical lens of embodiment 10 of the present application.

[0061] Figure 39 A relative luminance curve of the optical lens of embodiment 10 of the present application.

[0062] Figure 40 An MTF curve of the optical lens of embodiment 10 of the present application.

[0063] Figure 41 A structural schematic diagram of the optical lens of embodiment 11 of the present application.

[0064] Figure 42 A field curvature curve of the optical lens of embodiment 11 of the present application.

[0065] Figure 43 A relative luminance curve of the optical lens of embodiment 11 of the present application.

[0066] Figure 44 An MTF curve of the optical lens of embodiment 11 of the present application.

[0067] Figure 45 A structural schematic diagram of the optical lens of embodiment 12 of the present application.

[0068] Figure 46 A field curvature graph for the optical lens of Example 12 of the present application.

[0069] Figure 47 A relative luminance graph for the optical lens of Example 12 of the present application.

[0070] Figure 48 An MTF graph for the optical lens of Example 12 of the present application. DETAILED DESCRIPTION

[0071] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of embodiments of the present application and does not limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0072] It is noted that, in this specification, the expressions first, second, third, etc. are merely used 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 the second lens or the third lens without departing from the teachings of the present application.

[0073] 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.

[0074] In this specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0075] It should also be understood that the use of the terms "including", "including having", "having", "containing", and / or "containing having" when used in this specification intends that existence of stated features, elements and / or components but does not exclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0076] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that the terms should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0077] 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.

[0078] The optical lens according to an embodiment of the present application comprises, in order from an object side to an image plane: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and a filter, and optical centers of the lenses are located on the same straight line.

[0079] In some embodiments, the first lens is configured to have a negative focal power and a concave object side surface, which can reduce the overall length of the lens, and help to reduce axial and radial astigmatism, so that the imaging is clearer and sharper, and the imaging quality of the optical lens is improved.

[0080] In some embodiments, the second lens is configured to have a positive focal power and a convex image side surface, which can effectively constrain the large-angle light rays passing through the first lens, slow down the light turning trend and make it transition smoothly, and can balance the aberration generated by the first lens, and reduce the sensitivity of the optical lens.

[0081] In some embodiments, the third lens is configured to have a negative focal power and a concave object side surface, which is conducive to better control of the path and distribution of the light beam, so that the light rays pass through the diaphragm more uniformly, and the uniformity of the imaging picture of the optical lens is effectively improved.

[0082] In some embodiments, the fourth lens is configured to have a positive focal power, can further converge the light rays, reduce the height of the light rays, make the light rays transition smoothly, and balance the spherical aberration and field curvature generated by the front lenses, and improve the imaging quality of the optical lens.

[0083] In some embodiments, the fifth lens and the sixth lens are bonded to form a bonded lens, to share the chromatic aberration correction of the optical lens and improve the resolution of the optical lens; the fifth lens is configured to have a negative focal power and a concave image side, and the sixth lens is configured to have a positive focal power, a convex object side, and a convex image side, can converge the light rays emitted from the fourth lens and make them transition smoothly, can correct various aberrations caused by the front lenses, can reduce the loss of light rays in each field of view, improve the relative luminance of each field of view, and thus improve the imaging quality of the optical lens.

[0084] In some embodiments, the seventh lens is configured to have a negative focal power, which is beneficial to increase the imaging area of the optical lens and improve the imaging quality of the optical lens.

[0085] In some embodiments, the diaphragm is arranged between the third lens and the fourth lens, to converge the range of light rays emitted by the front lenses, reduce the aperture of the rear lenses, and balance the structures of the front lens group and the rear lens group.

[0086] In some embodiments, the F number FNO of the optical lens satisfies: 1.90 < FNO < 2.90. Satisfying the above range is beneficial to realize the large aperture characteristic, and can ensure the clarity of the image in a weak light environment or at night.

[0087] In some embodiments, the maximum field of view FOV of the optical lens satisfies: 75° < FOV < 180°. Satisfying the above range is beneficial to realize the wide-angle characteristic, so as to obtain more scene information and meet the demand of large-range detection.

[0088] In some embodiments, the maximum field of view angle chief ray angle of the optical lens on the image plane CRA satisfies: 12° < CRA < 45°. Satisfying the above range can make the CRA of the optical lens have a large allowable error range with the CRA of the chip photosensitive element, and improve the adaptation ability of the optical lens to the image sensor.

[0089] In some embodiments, the total track length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL / f < 6.0. Satisfying the above range can effectively limit the length and volume of the optical lens, and realize the miniaturization of the optical lens.

[0090] In some embodiments, the optical total length TTL of the optical lens and the image height IH corresponding to the maximum field of view angle of the optical lens satisfy: TTL / IH<2.8. Satisfying the above range, the optical total length of the optical lens can be shortened while realizing large target surface imaging of the optical lens, so that the balance between small size and large target surface imaging of the optical lens can be realized, and the market competitiveness can be improved.

[0091] In some embodiments, the effective focal length f of the optical lens, the maximum field of view angle FOV of the optical lens, and the image height IH corresponding to the maximum field of view angle of the optical lens satisfy: 55.0

[0092] In some embodiments, the object side aperture diameter D1 of the first lens and the image height IH corresponding to the maximum field of view angle of the optical lens satisfy: 0.9

[0093] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f<-1.2. Satisfying the above range, the first lens can have appropriate negative focal power, which is conducive to making the refraction angle of the incident light change more gently, avoiding too strong refraction change to generate too much aberration, and at the same time, helping more light to enter the rear lens, increasing the field of view angle of the optical lens, and improving the relative luminance of the optical lens.

[0094] In some embodiments, the effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: f3 / f<-1.5. Satisfying the above range, the third lens can have appropriate negative focal power, which is conducive to expanding the effective field of view angle of the optical lens, enabling more light to enter the optical lens, and better controlling the path and distribution of the light beam, so that the light passes through the diaphragm more uniformly, effectively improving the uniformity of the imaging picture of the optical lens.

[0095] In some embodiments, the effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7 / f<-0.4. Satisfying the above range, the seventh lens can have appropriate negative focal power, which is conducive to increasing the incident angle of the light entering the imaging surface, further increasing the imaging area of the optical lens, and realizing large target surface imaging of the optical lens.

[0096] In some embodiments, the curvature radius R1 of the object side surface of the first lens and the effective focal length f of the optical lens satisfy: R1 / f<-3.5. Satisfying the above range, the curvature of the object side surface of the first lens can be effectively controlled, the field of view angle can be increased while the front end aperture of the optical lens is controlled, and the total length of the optical lens is also conducive.

[0097] In some embodiments, the curvature radius R4 of the image side surface of the second lens and the effective focal length f of the optical lens satisfy: -3.5 < R4 / f < -1.0; the curvature radius R5 of the object side surface of the third lens and the effective focal length f of the optical lens satisfy: -10.0 < R5 / f < -0.4. Satisfying the above ranges, not only the transmission efficiency of light can be improved, but also the sensitivity of the lens can be reduced, which is beneficial to improve the production yield.

[0098] In some embodiments, the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens satisfy: 0 < |(R4-R5) / (R4+R5)| < 0.8. Satisfying the above range, the light can be better converged, and the processing difficulty caused by the too curved surface of the second lens and the third lens can be avoided, which can effectively improve the yield of the optical lens.

[0099] In some embodiments, the curvature radius R12 of the image side surface of the sixth lens and the effective focal length f of the optical lens satisfy: -4.5 < R12 / f < -0.5. Satisfying the above range, the relative luminance and the imaging clarity of the light on the imaging surface can be improved.

[0100] In some embodiments, the half-field radius sag3 of the object side surface of the second lens and the half-field radius d3 of the object side surface of the second lens satisfy: -0.18 < sag3 / d3 < -0.02. Satisfying the above range, the object side surface of the second lens with a small opening angle can be controlled, the details of the central field of view of the optical lens can be highlighted, and the imaging quality of the optical lens can be improved.

[0101] In some embodiments, the half-field radius sag4 of the image side surface of the second lens and the half-field radius d4 of the image side surface of the second lens satisfy: -0.25 < sag4 / d4 < -0.05. Satisfying the above range, the object side surface and the image side surface of the second lens can adopt a structure of approximate concentric circles, the field curvature can be optimized, and the imaging quality of the optical lens can be improved.

[0102] In some embodiments, the sum ∑CT of the central thicknesses of the first lens to the seventh lens and the total optical length TTL of the optical lens satisfy: 0.60 < ∑CT / TTL < 0.80. Satisfying the above range, the total length and the volume of the optical lens can be compressed, and the miniaturization of the optical lens can be maintained.

[0103] As an embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can adopt all-plastic lenses or glass-plastic hybrid lenses, both of which can achieve good imaging effects. In the present application, in order to further reduce the production cost and improve the imaging quality, a seven-piece all-plastic lens structure is adopted.

[0104] As an implementation, at least one of the object side or the image side of the first lens, the second lens, the third lens, the fifth lens, the sixth lens and the seventh lens is aspherical. The aspherical lens has the characteristic that the curvature is continuously changed from the lens center to the lens periphery, which is different from the spherical lens with constant curvature from the lens center to the lens periphery. The aspherical lens has better curvature radius characteristics, and has the advantages of improving distortion aberration and improving astigmatism aberration. After the aspherical lens is used, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0105] In order to make the system have better optical performance, a plurality of aspherical lenses are used in the lens, and the shape of each aspherical surface of the optical lens satisfies the following equation:

[0106]

[0107] Wherein, z is the distance of the curved surface to the vertex of the curved surface in the direction of the optical axis, h is the distance from the optical axis to the curved surface, c is the curvature of the vertex of the curved surface, K is the quadratic surface coefficient, A, B, C, D, E, F, G are the second-order, fourth-order, sixth-order, eighth-order, tenth-order, twelfth-order and fourteenth-order curved surface coefficients respectively.

[0108] The application will be further described in the following embodiments. In each embodiment, the thickness, the curvature radius and the material selection of each lens in the optical lens are different, and the specific differences can be referred to the parameter table of each embodiment. The following embodiments are only the preferred embodiments of the application, but the embodiments of the application are not limited to the following embodiments only, and any change, replacement, combination or simplification made without departing from the innovative points of the application should be regarded as equivalent replacement mode, and all are included in the protection scope of the application.

[0109] Embodiment 1

[0110] Please refer to Figure 1 , which is a structure schematic diagram of the optical lens provided in the embodiment 1 of the application. The optical lens comprises, along the optical axis from the object side to the imaging surface S17, a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and a filter G1.

[0111] The first lens L1 is a plastic aspheric lens with negative focal length, the object side S1 is a concave surface, and the image side S2 is a concave surface; the second lens L2 is a plastic aspheric lens with positive focal length, the object side S3 is a concave surface, and the image side S4 is a convex surface; the third lens L3 is a plastic aspheric lens with negative focal length, the object side S5 is a concave surface, and the image side S6 is a convex surface; the fourth lens L4 is a plastic aspheric lens with positive focal length, the object side S7 is a convex surface, and the image side S8 is a convex surface; the fifth lens L5 is a plastic aspheric lens with negative focal length, the object side S9 is a concave surface, and the image side S10 is a concave surface; the sixth lens L6 is a plastic aspheric lens with positive focal length, the object side S11 is a convex surface, and the image side S12 is a convex surface; the seventh lens L7 is a plastic aspheric lens with negative focal length, the object side S13 is a convex surface, and the image side S14 is a concave surface; and the filter G1, the object side S15 and the image side S16 are both flat surfaces.

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

[0113] Table 1-1

[0114]

[0115] The curve coefficients of the aspheric lenses of the optical lens in Embodiment 1 are shown in Table 1-2.

[0116] Table 1-2

[0117]

[0118]

[0119] Figure 2 The field curvature curve diagram of Embodiment 1 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 of view (unit: °). As can be seen from the figure, the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.08 mm, which shows that the optical lens can well correct the field curvature.

[0120] Figure 3 The relative luminance curve diagram of Embodiment 1 is shown, which represents the relative luminance value of different field angles on the imaging surface, the horizontal axis represents the half field of view (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 of view, which shows that the optical lens has good relative luminance.

[0121] Figure 4A modulation transfer function (MTF) curve of the optical lens of Embodiment 1 is shown, which represents the imaging modulation degree of different spatial frequencies under each field of view, the horizontal axis represents spatial frequency (unit: lp / mm), and the vertical axis represents MTF value. As can be seen from the figure, the MTF value of the embodiment is above 0.2 in the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low and high frequency cases.

[0122] Embodiment 2

[0123] Referring to Figure 5 , which is a structural schematic diagram of the optical lens provided in Embodiment 2 of the present application. The optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, and the main difference is that the fifth lens and the sixth lens are cemented lenses, and the curvature radius, asphericity coefficient, thickness, etc. of each lens surface 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 asphericity coefficients of the aspheric lenses of the optical lens in Embodiment 2 are shown in Table 2-2.

[0128] Table 2-2

[0129]

[0130]

[0131] Figure 6 to Figure 8 The field curvature curve, the relative luminance curve, and the modulation transfer function (MTF) curve of Embodiment 2 are shown respectively. As can be seen from the figures, the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.04 mm, which indicates that the optical lens can correct the field curvature very well; the relative luminance value of the optical lens is still greater than 50% at the maximum half field of view, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is above 0.2 in the full field of view, and in the range of 0-160 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low and high frequency cases.

[0132] Embodiment 3

[0133] Referring to Figure 9Figure 3 shows a structural schematic diagram of an optical lens provided in Embodiment 3 of the present application, the optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, the difference mainly lies in that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface type are different.

[0134] The related parameters of each lens in the optical lens in Embodiment 3 are shown in Table 3-1.

[0135] Table 3-1

[0136]

[0137]

[0138] The asphericity coefficients of the aspheric lenses of the optical lens in Embodiment 3 are shown in Table 3-2.

[0139] Table 3-2

[0140] Face No. K A B C S1 1.26E+01 0.00E+00 -3.13E-04 -1.38E-04 S2 -3.89E+01 0.00E+00 3.52E-03 2.48E-04 S3 -8.60E+01 0.00E+00 -7.83E-03 3.12E-04 S4 3.31E+00 0.00E+00 2.70E-02 -1.51E-02 S5 -2.93E+01 0.00E+00 1.43E-02 4.30E-03 S6 -6.61E+01 0.00E+00 -3.84E-02 1.55E-02 S7 3.59E-01 0.00E+00 -7.22E-02 -2.07E-02 S8 1.00E+02 0.00E+00 -5.01E-02 -2.64E-02 S9 8.26E+01 0.00E+00 -1.06E-02 -2.89E-03 S10 -1.09E+01 0.00E+00 8.38E-02 -3.88E-02 S11 -4.59E+00 0.00E+00 -4.91E-03 2.00E-03 S12 -1.69E+00 0.00E+00 -3.01E-02 5.14E-03 S13 1.36E+00 0.00E+00 -4.63E-02 3.67E-03 Face No. D E F G S1 7.65E-06 1.33E-06 -3.01E-08 S2 -3.73E-04 6.00E-05 -1.65E-06 S3 -5.74E-04 1.72E-04 -1.58E-05 S4 1.47E-02 -3.42E-03 1.48E-04 S5 6.37E-03 3.70E-04 6.38E-04 S6 3.38E-03 -3.75E-04 2.90E-04 S7 -3.10E-02 3.22E-02 -1.43E-02 S8 -1.08E-02 -4.23E-03 6.88E-03 S9 1.14E-03 1.41E-03 2.55E-03 S10 2.98E-03 3.91E-03 -5.36E-04 S11 5.61E-04 1.94E-04 2.78E-05 S12 1.36E-04 1.07E-04 -4.45E-05 -1.92E-05 S13 -3.12E-05 -1.20E-05 -1.47E-05 4.87E-07

[0141] Figure 10 to Figure 12 The field curvature curve, the relative luminance curve and the modulation transfer function (MTF) curve of Embodiment 3 are shown respectively. It can be seen from the figures that the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.2 mm, which indicates that the optical lens can correct the field curvature well; the relative luminance value of the optical lens is still greater than 40% at the maximum half field angle, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is all above 0.2 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view, and the optical lens has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0142] Embodiment 4

[0143] Please refer to Figure 13 Figure 4 shows a structural schematic diagram of an optical lens provided in Embodiment 4 of the present application, the optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, the difference mainly lies in that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface type are different.

[0144] The related parameters of each lens in the optical lens in Embodiment 4 are shown in Table 4-1.

[0145] Table 4-1

[0146]

[0147] The curve coefficients of the aspherical lenses of the optical lens in embodiment 4 are shown in table 4-2.

[0148] Table 4-2

[0149]

[0150]

[0151] Figure 14 to Figure 16 The field curvature curve, the relative luminance curve and the modulation transfer function (MTF) curve of embodiment 4 are shown respectively. It can be seen from the figures that the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.06 mm, which indicates that the optical lens can correct the field curvature well; 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; the MTF value of the optical lens is all above 0.3 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view, and the optical lens has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0152] Embodiment 5

[0153] Please refer to Figure 17 , which is a structural schematic diagram of the optical lens provided in embodiment 5 of the present application. The optical lens in the present embodiment is substantially the same as the optical lens in embodiment 1 described above, and the main difference is that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, the aspherical coefficients and the thickness of each lens surface are different.

[0154] The related parameters of each lens in the optical lens in embodiment 5 are shown in table 5-1.

[0155] Table 5-1

[0156]

[0157]

[0158] The curve coefficients of the aspherical lenses of the optical lens in embodiment 5 are shown in table 5-2.

[0159] Table 5-2

[0160]

[0161]

[0162] Figure 18 to Figure 20The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 5 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.06 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 70%, indicating that the optical lens has excellent relative illumination. The MTF value of the optical lens is above 0.3 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and uniformly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0163] Example 6

[0164] Please see Figure 21 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 6 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the fifth lens and the sixth lens are cemented lenses, and the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0165] The relevant parameters of each lens in the optical lens of Example 6 are shown in Table 6-1.

[0166] Table 6-1

[0167]

[0168] The surface coefficients of the aspherical lens in the optical lens of Example 6 are shown in Table 6-2.

[0169] Table 6-2

[0170] Face No. K A B C S1 -6.88E+01 0.00E+00 1.45E-03 -2.50E-05 S2 -6.29E-01 0.00E+00 1.37E-02 4.27E-04 S3 1.00E+02 0.00E+00 -2.76E-02 -8.30E-04 S4 5.52E+00 0.00E+00 1.13E-02 -1.36E-02 S5 -1.01E+01 0.00E+00 2.79E-03 -9.38E-04 S6 -9.30E+01 0.00E+00 -1.92E-02 1.42E-02 S7 1.57E+00 0.00E+00 -6.91E-02 6.27E-03 S8 -4.34E+00 0.00E+00 -2.15E-02 -9.25E-04 S9 6.02E+01 0.00E+00 4.93E-03 -3.02E-03 S10 6.35E-01 0.00E+00 1.02E-02 3.34E-03 S11 -7.74E+00 0.00E+00 -1.99E-03 1.87E-03 S12 1.58E+00 0.00E+00 -2.94E-02 3.53E-03 S13 -5.44E+00 0.00E+00 -1.45E-02 1.86E-03 Face No. D E F G S1 -1.25E-07 -1.16E-08 -3.98E-10 S2 -1.15E-04 3.79E-04 5.18E-05 S3 2.26E-04 3.55E-04 -6.66E-05 S4 1.22E-02 -3.53E-03 4.77E-04 S5 4.49E-03 -1.32E-03 2.09E-04 S6 -2.35E-04 -3.03E-03 1.27E-03 S7 -6.13E-03 1.50E-03 -7.87E-04 S8 -2.79E-03 2.41E-03 -8.00E-04 S9 1.35E-03 8.19E-05 -9.76E-05 S10 -5.88E-04 3.69E-04 -1.27E-04 S11 3.82E-05 -3.28E-05 3.71E-06 S12 -4.10E-04 5.15E-05 -3.08E-06 2.42E-09 S13 -2.70E-04 3.80E-05 -4.23E-06 1.64E-07

[0171] Figure 22 to Figure 24 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 6 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.1 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 70%, indicating that the optical lens has excellent relative illumination. The MTF value of the optical lens is above 0.1 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and uniformly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0172] Example 7

[0173] Please see Figure 25Figure 7 shows a structural schematic diagram of an optical lens provided in Embodiment 7 of the present application. The optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, except that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface are different.

[0174] The related parameters of each lens in the optical lens in Embodiment 7 are shown in Table 7-1.

[0175] Table 7-1

[0176]

[0177] The asphericity coefficients of the aspheric lenses in the optical lens in Embodiment 7 are shown in Table 7-2.

[0178] Table 7-2

[0179]

[0180]

[0181] Figure 26 to Figure 28 The field curvature curve, relative luminance curve, and modulation transfer function (MTF) curve of Embodiment 7 are shown respectively. As can be seen from the figures, the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.12 mm, which indicates that the optical lens can correct the field curvature well; 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 excellent relative luminance; the MTF value of the optical lens is above 0.2 in the full field of view, and in the range of 0-160 lp / mm, the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view, and the optical lens has good imaging quality and good detail resolution ability in both low frequency and high frequency cases.

[0182] Embodiment 8

[0183] Please refer to Figure 29 Figure 8 shows a structural schematic diagram of an optical lens provided in Embodiment 8 of the present application. The optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, except that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface are different.

[0184] The related parameters of each lens in the optical lens in Embodiment 8 are shown in Table 8-1.

[0185] Table 8-1

[0186]

[0187]

[0188] The curve coefficients of the aspherical lens of the optical lens in Embodiment 8 are shown in Table 8-2.

[0189] Table 8-2

[0190] Face No. K A B C S1 -5.33E+01 0.00E+00 1.53E-03 -1.51E-04 S2 -4.11E+00 0.00E+00 4.27E-03 6.61E-04 S3 -4.04E+01 0.00E+00 -1.31E-02 7.92E-04 S4 3.21E+00 0.00E+00 1.66E-02 -1.45E-02 S5 -8.66E+00 0.00E+00 -1.22E-02 2.72E-03 S6 -1.42E+02 0.00E+00 -2.07E-02 1.18E-02 S7 1.40E+00 0.00E+00 -6.70E-02 -4.86E-04 S8 -3.99E+00 0.00E+00 -1.88E-02 1.99E-03 S9 1.00E+02 0.00E+00 5.64E-03 -8.98E-04 S10 4.84E-02 0.00E+00 2.62E-02 -6.52E-03 S11 -4.34E+00 0.00E+00 -5.17E-03 8.67E-04 S12 -3.33E+00 0.00E+00 -3.31E-02 4.95E-03 S13 -1.48E+02 0.00E+00 -2.25E-02 1.69E-03 Face No. D E F G S1 4.52E-06 1.15E-06 -8.21E-08 S2 -2.48E-04 5.22E-05 -2.99E-06 S3 -5.90E-04 1.96E-04 -1.94E-05 S4 1.24E-02 -3.58E-03 4.13E-04 S5 5.32E-03 -2.02E-03 6.35E-05 S6 1.50E-04 -8.28E-04 -4.28E-04 S7 -6.15E-03 2.39E-03 -1.33E-03 S8 -3.64E-03 1.17E-03 -3.60E-04 S9 6.29E-04 -4.15E-05 -3.40E-06 S10 1.11E-03 3.07E-04 -4.99E-05 S11 2.71E-04 5.30E-05 -5.98E-06 S12 -2.47E-04 4.48E-05 -1.29E-05 8.45E-07 S13 -2.60E-04 4.67E-05 -3.54E-06 -5.72E-08

[0191] Figure 30 to Figure 32 The field curvature curve, the relative luminance curve and the modulation transfer function (MTF) curve of Embodiment 8 are shown respectively. It can be seen from the figures that the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.4 mm, which indicates that the optical lens can correct the field curvature well; the relative luminance value of the optical lens is still greater than 60% at the maximum half field angle, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is all above 0.2 within the full field of view, and the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view within the range of 0-160 lp / mm, which has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0192] Embodiment 9

[0193] Please refer to Figure 33 , which is a structural schematic diagram of the optical lens provided in Embodiment 9 of the present application. The optical lens in the present embodiment is substantially the same as the optical lens in Embodiment 1 described above, and the main difference is that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, the aspherical coefficients, the thickness and the like of each lens surface are different.

[0194] The related parameters of each lens in the optical lens in Embodiment 9 are shown in Table 9-1.

[0195] Table 9-1

[0196]

[0197] The curve coefficients of the aspherical lens of the optical lens in Embodiment 9 are shown in Table 9-2.

[0198] Table 9-2

[0199]

[0200]

[0201] Figure 34 to Figure 36The field curvature curve, the relative luminance curve and the modulation transfer function (MTF) curve of the optical lens of embodiment 9 are shown in the figures. As can be seen from the figures, the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.1 mm, which indicates that the optical lens can correct the field curvature well; the relative luminance value of the optical lens is still greater than 60% at the maximum half field angle, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is all 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 of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0202] Embodiment 10

[0203] Please refer to Figure 37 , which is a structural schematic diagram of the optical lens provided in embodiment 10 of the present application. The optical lens in the present embodiment is substantially the same as the optical lens in embodiment 1 described above, and the main difference is that the fifth lens and the sixth lens are cemented lenses, and the curvature radius, asphericity coefficient, thickness and the like of each lens surface are different.

[0204] The related parameters of each lens in the optical lens in embodiment 10 are shown in Table 10-1.

[0205] Table 10-1

[0206]

[0207]

[0208] The asphericity coefficients of the asphericity lenses of the optical lens in embodiment 10 are shown in Table 10-2.

[0209] Table 10-2

[0210] Face No. K A B C S1 9.97E+01 0.00E+00 1.16E-03 -1.64E-04 S2 -2.74E+00 0.00E+00 4.67E-03 6.40E-04 S3 -6.33E+01 0.00E+00 -1.26E-02 7.37E-04 S4 3.10E+00 0.00E+00 1.67E-02 -1.43E-02 S5 -8.68E+00 0.00E+00 -1.24E-02 2.66E-03 S6 -1.41E+02 0.00E+00 -2.09E-02 1.17E-02 S7 1.38E+00 0.00E+00 -6.68E-02 -3.53E-04 S8 -4.73E+00 0.00E+00 -1.84E-02 1.75E-03 S9 -7.10E+01 0.00E+00 5.68E-03 -8.41E-04 S10 3.19E-02 0.00E+00 2.49E-02 -6.76E-03 S11 -3.54E+00 0.00E+00 -5.26E-03 1.06E-03 S12 -2.81E+00 0.00E+00 -3.33E-02 4.85E-03 S13 -9.18E+01 0.00E+00 -2.31E-02 1.61E-03 Face No. D E F G S1 4.03E-06 1.17E-06 -7.24E-08 S2 -2.60E-04 5.16E-05 -2.53E-06 S3 -5.83E-04 1.99E-04 -1.82E-05 S4 1.24E-02 -3.56E-03 4.22E-04 S5 5.38E-03 -1.96E-03 7.74E-05 S6 1.11E-04 -8.94E-04 -4.90E-04 S7 -6.12E-03 2.41E-03 -1.35E-03 S8 -3.71E-03 1.18E-03 -3.29E-04 S9 6.58E-04 -4.38E-05 -1.60E-06 S10 1.19E-03 3.17E-04 -4.97E-05 S11 2.81E-04 5.27E-05 -6.68E-06 S12 -2.82E-04 3.82E-05 -1.37E-05 8.79E-07 S13 -2.65E-04 4.74E-05 -3.36E-06 -2.30E-08

[0211] Figure 38 to Figure 40 The field curvature curve, the relative luminance curve and the modulation transfer function (MTF) curve of the optical lens of embodiment 10 are shown in the figures. As can be seen from the figures, the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.3 mm, which indicates that the optical lens can correct the field curvature well; the relative luminance value of the optical lens is still greater than 60% at the maximum half field angle, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is all 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 of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0212] Embodiment 11

[0213] Referring to FIG. 11, a structural schematic diagram of an optical lens provided in Embodiment 11 of the present application is shown, the optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, the difference mainly lies in that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface type are different. Figure 41

[0214] The related parameters of each lens in the optical lens in Embodiment 11 are shown in Table 11-1.

[0215] Table 11-1

[0216]

[0217] The asphericity coefficients of the aspheric lenses in the optical lens in Embodiment 11 are shown in Table 11-2.

[0218] Table 11-2

[0219]

[0220]

[0221] Figure 41 to Figure 42 The field curvature curve, relative luminance curve, and modulation transfer function (MTF) curve of Embodiment 11 are shown respectively. It can be seen from the figures that the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.08 mm, which indicates that the optical lens can correct the field curvature well; the relative luminance value of the optical lens is still greater than 40% at the maximum half field angle, which indicates that the optical lens has good relative luminance; the MTF value of the optical lens is all above 0.2 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view, and the optical lens has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0222] Embodiment 12

[0223] Referring to FIG. 12, a structural schematic diagram of an optical lens provided in Embodiment 12 of the present application is shown, the optical lens in this embodiment is substantially the same as the optical lens in Embodiment 1 described above, the difference mainly lies in that the fifth lens and the sixth lens are cemented lenses, and the radius of curvature, asphericity coefficient, thickness, etc. of each lens surface type are different. Figure 43 The related parameters of each lens in the optical lens in Embodiment 12 are shown in Table 12-1.

[0224] Table 12-1

[0225]

[0226] ​​

[0227]

[0228] The curve coefficients of the aspherical lens of the optical lens in embodiment 12 are shown in table 12-2.

[0229] Table 12-2

[0230]

[0231]

[0232] Figure 44 to Figure 48 The field curvature curve, the relative illumination curve and the modulation transfer function (MTF) curve of embodiment 12 are shown respectively. It can be seen from the figures that the field curvature of the meridional image surface and the sagittal image surface is controlled within ±0.2 mm, which indicates that the optical lens can correct the field curvature well; the relative illumination value of the optical lens is still greater than 40% at the maximum half field of view, which indicates that the optical lens has good relative illumination; the MTF value of the optical lens is all above 0.2 within the full field of view, and in the range of 0-160 lp / mm, the MTF curve is uniformly and smoothly decreased from the center to the edge of the field of view, and the optical lens has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0233] Please refer to table 13, which shows the optical characteristics corresponding to the above twelve embodiments, including the effective focal length f, the maximum field of view FOV, the entrance pupil diameter EPD, the total optical length TTL, the aperture value FNO, the image height IH corresponding to the maximum field of view, the incident angle CRA of the chief ray of the maximum field of view on the image surface and the numerical value corresponding to each conditional expression in each embodiment.

[0234] Table 13

[0235]

[0236]

[0237] Table 13 (continued)

[0238] Parameter and conditional expression Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 f (mm) 2.47 3.04 2.96 2.95 3.35 3.38 FOV (°) 162.00 176.00 178.00 178.00 120.00 80.00 EPD (mm) 1.18 1.52 1.48 1.47 1.20 1.54 TTL (mm) 13.15 11.27 10.53 11.48 8.69 10.26 FNO 2.10 2.00 2.00 2.00 2.80 2.20 IH (mm) 5.00 5.95 5.75 5.76 5.23 3.81 CRA (°) 15.78 28.02 29.30 28.29 39.98 42.11 TTL / f 5.32 3.70 3.56 3.90 2.59 3.03 TTL / IH 2.63 1.89 1.83 1.99 1.66 2.69 f*FOV / IH 80.14 90.01 91.64 91.08 76.76 71.03 D1 / IH 1.25 1.05 1.06 1.13 1.02 1.54 f1 / f -2.22 -2.68 -2.54 -2.81 -102.27 -2.37E+05 f3 / f -1.91 -1.89 -1.90 -1.97 -2.32 -2.54 f7 / f -3.49E+06 -0.90 -1.32 -0.99 -0.55 -0.54 R1 / f -3.99 -13.04 -33.78 -33.97 -31.64 -45.66 R4 / f -1.56 -1.25 -1.28 -1.29 -1.37 -1.52 R5 / f -0.68 -0.57 -0.59 -0.59 -1.28 -1.85 (R4-R5) / (R4+R5) 0.40 0.38 0.37 0.37 0.03 -0.10 R12 / f -4.23 -0.85 -1.53 -1.03 -0.65 -0.59 Sag3 / d3 -0.16 -0.15 -0.12 -0.13 -0.04 -0.03 Sag4 / d4 -0.15 -0.21 -0.19 -0.19 -0.08 -0.06 ΣCT / TTL 0.67 0.68 0.63 0.65 0.76 0.77

[0239] In summary, the optical lens in the embodiments of the present application can realize the effects of large field of view (the maximum FOV value is 178°), large aperture (the minimum FNO value is 2.0), miniaturization (the minimum TTL value is 8.69 mm) and high pixels by reasonably distributing the refractive power of each lens, reasonably matching the surface shape of each lens, reasonably setting the thickness of each lens and the distance between each lens, and simultaneously adopting the matching structure of seven plastic aspherical lenses, so as to meet the requirements of vehicle-mounted lens shooting.

[0240] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0241] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An optical lens, comprising seven lenses in order from an object side to an image side along an optical axis as follows: a first lens with negative refractive power, an object side surface of which is concave; a second lens with positive refractive power, an image side surface of which is convex; a third lens with negative refractive power, an object side surface of which is concave; a fourth lens with positive refractive power; a fifth lens with negative refractive power, an image side surface of which is concave; a sixth lens with positive refractive power, an object side surface of which is convex and an image side surface of which is convex; and a seventh lens with negative refractive power; wherein a radius of curvature R1 of the object side surface of the first lens and an effective focal length f of the optical lens satisfy: R1 / f<-3.5; a sagittal height of a half entrance pupil diameter Sag3 of the object side surface of the second lens and a half entrance pupil diameter d3 of the object side surface of the second lens satisfy: -0.18<Sag3 / d3<-0.

02. An optical total track length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL / f<6.

0. An optical total track length TTL of the optical lens and an image height IH corresponding to a maximum field of view angle of the optical lens satisfy: TTL / IH<2.

8. The effective focal length f of the optical lens, a maximum field of view angle FOV of the optical lens and the image height IH corresponding to the maximum field of view angle of the optical lens satisfy: 55.0<f*FOV / IH<95.

0. An effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f<-1.

2. An effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: f3 / f<-1.

5. An effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7 / f<-0.

4. A radius of curvature R4 of the image side surface of the second lens and the effective focal length f of the optical lens satisfy: -3.5<R4 / f<-1.0; and a radius of curvature R5 of the object side surface of the third lens and the effective focal length f of the optical lens satisfy: -10.0<R5 / f<-0.

4. wherein A radius of curvature R12 of the image side surface of the sixth lens and the effective focal length f of the optical lens satisfy: -4.5<R12 / f<-0.

5. A sum ∑CT of central thicknesses of the first to seventh lenses and the optical total track length TTL of the optical lens satisfy: 0.60<∑CT / TTL<0.

80.

2. The optical lens of claim 1, wherein, ​ 3. The optical lens of claim 1, wherein, ​ 4. The optical lens of claim 1, wherein, ​ 5. The optical lens of claim 1, wherein, ​ 6. The optical lens of claim 1, wherein, ​ 7. The optical lens of claim 1, wherein, ​ 8. The optical lens of claim 1, wherein, ​ 9. The optical lens of claim 1, wherein, ​ 10. The optical lens of claim 1, wherein, ​

Images