Wide-angle optical lens

Abstract

The application provides a wide-angle optical lens, which can solve the problems of small target surface and difficulty in simultaneously having large field of view and low distortion of the existing wide-angle optical lens. The lens comprises a first meniscus positive lens, a first meniscus negative lens, a second meniscus negative lens, a flat concave lens, a third meniscus negative lens, a first biconvex positive lens, a second meniscus positive lens, a biconcave negative lens and a second biconvex positive lens arranged in sequence from an object plane to an image plane along the propagation direction of incident light. The focal length f1 of the first meniscus positive lens, the focal length f2 of the first meniscus negative lens, the focal length f3 of the second meniscus negative lens, the focal length f4 of the flat concave lens, the focal length f5 of the third meniscus negative lens, the focal length f6 of the first biconvex positive lens, the focal length f7 of the second meniscus positive lens, the focal length f8 of the biconcave negative lens and the focal length f9 of the second biconvex positive lens satisfy the following relationship with the focal length f of the overall structure formed by the nine lenses: 2.60 < f1 / f < 3.60, -1.20 < f2 / f < -1.00, -1.00 < f3 / f < -0.80, -1.80 < f4 / f < 2.50, -0.4 < f5 / f < 0.2, 0.2 < f6 / f < 0.4, 0.70 < f7 / f < 0.90, -0.90 < f8 / f < -0.60, and 1.00 < f9 / f < 1.20.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical lens, in particular to a wide-angle optical lens. BACKGROUND

[0002] The main contradiction of the wide-angle lens is the correction of field curvature and distortion. The overall refractive power distribution of the wide-angle lens is negative group in front and positive group in back. In the industrial production of cloth, paper and other fields, a wide-angle lens fixed at a certain distance is usually used to quickly shoot the cloth or paper, so as to realize the detection of the cloth or paper yield and defects. For the detection of cloth or paper products, the distortion requirement of the wide-angle lens is strict. However, the existing wide-angle optical lens has the following shortcomings: the target surface is small, and it is difficult to have large field of view and low distortion at the same time. SUMMARY

[0003] The purpose of the present application is to solve the technical problems of the existing wide-angle optical lens that the target surface is small and it is difficult to have large field of view and low distortion at the same time, and to provide a wide-angle optical lens.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A wide-angle optical lens, characterized in that: comprising a first meniscus positive lens, a first meniscus negative lens, a second meniscus negative lens, a flat concave lens, a third meniscus negative lens, a first double convex positive lens, a second meniscus positive lens, a double concave negative lens and a second double convex positive lens arranged in sequence from the object plane to the image plane along the propagation direction of the incident light, and the total number of lenses is 9.

[0006] The incident surface of the first meniscus positive lens is convex, and the exit surface is concave; the incident surface of the first meniscus negative lens is convex, and the exit surface is concave; the incident surface of the second meniscus negative lens is convex, and the exit surface is concave; the incident surface of the flat concave lens is concave, and the exit surface is flat; the incident surface of the third meniscus negative lens is convex, and the exit surface is concave; the incident surface of the first double convex positive lens is convex, and the exit surface is convex; the incident surface of the second meniscus positive lens is concave, and the exit surface is convex; the incident surface of the double concave negative lens is concave, and the exit surface is concave; the incident surface of the second double convex positive lens is convex, and the exit surface is convex; the exit surface of the third meniscus negative lens is glued to the incident surface of the first double convex positive lens.

[0007] The focal length f1 of the first meniscus positive lens, the focal length f2 of the first meniscus negative lens, the focal length f3 of the second meniscus negative lens, the focal length f4 of the plano-concave lens, the focal length f5 of the third meniscus negative lens, the focal length f6 of the first double convex positive lens, the focal length f7 of the second meniscus positive lens, the focal length f8 of the double concave negative lens, and the focal length f9 of the second double convex positive lens satisfy the following relationships with the focal length f of the overall structure composed of the first meniscus positive lens, the first meniscus negative lens, the second meniscus negative lens, the plano-concave lens, the third meniscus negative lens, the first double convex positive lens, the second meniscus positive lens, the double concave negative lens, and the second double convex positive lens: 2.60 < f1 / f < 3.60, -1.20 < f2 / f < -1.00, -1.00 < f3 / f < -0.80, -2.50 < f4 / f < -1.80, -0.4 < f5 / f < -0.2, 0.2 < f6 / f < 0.4, 0.70 < f7 / f < 0.90, -0.90 < f8 / f < -0.60, and 1.00 < f9 / f < 1.20.

[0008] The exit surface of the third meniscus negative lens and the entrance surface of the first double convex positive lens are cemented, which can effectively correct the chromatic aberration of the optical lens, reduce the sensitivity of the optical lens to decentration, balance the aberration of the optical lens, and improve the imaging quality of the optical lens. In addition, the optical lens can also reduce the assembly sensitivity, thereby reducing the processing difficulty and improving the assembly yield.

[0009] Further, the first meniscus positive lens, the first meniscus negative lens, and the second meniscus negative lens are made of optical glass material with a refractive index nd of 1.87 to 1.90 and an Abbe number vd of 38 to 41; the plano-concave lens is made of optical glass material with nd of 1.80 to 1.85 and vd of 23 to 25; the third meniscus negative lens is made of optical glass material with nd of 1.89 to 1.91 and vd of 34 to 38; the first double convex positive lens is made of optical glass material with nd of 1.61 to 1.65 and vd of 34 to 37; the second meniscus positive lens is made of optical glass material with nd of 1.58 to 1.60 and vd of 66 to 69; the double concave negative lens is made of optical glass material with nd of 1.84 to 1.86 and vd of 29 to 31; and the second double convex positive lens is made of optical glass material with nd of 1.47 to 1.50 and vd of 66 to 71.

[0010] Further, the optical stop is arranged between the first double convex positive lens and the second meniscus positive lens.

[0011] The optical stop is used to limit the light beam, which can reduce the generation of the optical lens astigmatism and improve the image quality. The optical stop is arranged at the middle part of the entire optical lens, and the light can be smoothly transitioned to the rear group, and the light reaches the image plane at a small angle, which is beneficial to improve the relative luminance of the entire optical lens.

[0012] Further, the intervals between the adjacent surfaces from the entrance surface to the image surface of the first meniscus positive lens in the direction of the light path are 8.57-8.77 mm, 0.05-0.20 mm, 1.21-1.41 mm, 2.75-2.95 mm, 0.70-0.90 mm, 3.28-3.48 mm, 8.90-9.10 mm, 0.05-0.20 mm, 2.25-2.45 mm, 4.20-4.40 mm, 0.25-0.45 mm, 1.72-1.92 mm, 1.56-1.76 mm, 3.61-3.81 mm, 0.70-0.90 mm, 2.16-2.36 mm, 4.43-4.63 mm, 39.90-40.10 mm, respectively.

[0013] Further, the radius of curvature of the entrance surface of the first meniscus positive lens is 27.038-29.884 mm, and the radius of curvature of the exit surface is 47.019-51.968 mm.

[0014] The radius of curvature of the entrance surface of the first meniscus negative lens is 16.210-17.916 mm, and the radius of curvature of the exit surface is 8.457-9.347 mm.

[0015] The radius of curvature of the entrance surface of the second meniscus negative lens is 15.552-17.189 mm, and the radius of curvature of the exit surface is 7.714-8.526 mm.

[0016] The radius of curvature of the entrance surface of the plano-concave lens is -39.747--35.962 mm, and the radius of curvature of the exit surface is infinity.

[0017] The radius of curvature of the entrance surface of the third meniscus negative lens is 14.914-16.484 mm, and the radius of curvature of the exit surface is 3.810-4.211 mm, and the radius of curvature of the exit surface of the first biconvex positive lens is -23.221--21.010 mm.

[0018] The radius of curvature of the surface of the diaphragm is infinity.

[0019] The radius of curvature of the entrance surface of the second meniscus positive lens is -20.400--18.457 mm, and the radius of curvature of the exit surface is -7.084--6.410 mm.

[0020] The radius of curvature of the entrance surface of the biconcave negative lens is -46.663--42.219 mm, and the radius of curvature of the exit surface is 21.695-23.979 mm.

[0021] The second biconvex positive lens has an incident surface radius of curvature of 44.381mm~49.053mm and an exit surface radius of curvature of -14.716 mm~-13.314mm.

[0022] Further, the first meniscus positive lens has an incident surface radius of curvature of 28.390mm and an exit surface radius of curvature of 49.366mm;

[0023] The first meniscus negative lens has an incident surface radius of curvature of 17.024mm and an exit surface radius of curvature of 8.880mm;

[0024] The second meniscus negative lens has an incident surface radius of curvature of 16.332mm and an exit surface radius of curvature of 8.097mm;

[0025] The plano-concave lens has an incident surface radius of curvature of -37.756mm;

[0026] The third meniscus negative lens has an incident surface radius of curvature of 15.659mm and an exit surface radius of curvature of 4.000mm, and the first biconvex positive lens has an incident surface radius of curvature of 4.000mm and an exit surface radius of curvature of -22.059mm;

[0027] The second meniscus positive lens has an incident surface radius of curvature of -19.377mm and an exit surface radius of curvature of -6.732mm;

[0028] The biconcave negative lens has an incident surface radius of curvature of -44.333mm and an exit surface radius of curvature of 22.776mm;

[0029] The second biconvex positive lens has an incident surface radius of curvature of 46.596mm and an exit surface radius of curvature of -13.984mm.

[0030] Further, the intervals between the adjacent surfaces from the incident surface to the image surface of the first meniscus positive lens in the direction of light propagation are 8.67mm, 0.10mm, 1.31mm, 2.85mm, 0.80mm, 3.38mm, 9.00mm, 0.10mm, 2.35mm, 4.30mm, 0.35mm, 1.82mm, 1.66mm, 3.71mm, 0.80mm, 2.26mm, 4.53mm, 40.00mm, respectively.

[0031] Further, the F number of the overall structure composed of the first meniscus positive lens, the first meniscus negative lens, the second meniscus negative lens, the plano-concave lens, the third meniscus negative lens, the first biconvex positive lens, the second meniscus positive lens, the biconcave negative lens and the second biconvex positive lens is ≤16.

[0032] Further, the first meniscus positive lens, the first meniscus negative lens and the second meniscus negative lens all adopt H-ZLAF68N material with nd=1.88 and vd=39.2; the plano-concave lens adopts H-ZF52 material with nd=1.85 and vd=23.8; the third meniscus negative lens adopts H-ZLAF4LA material with nd=1.91 and vd=35.3; the first biconvex positive lens adopts H-F13 material with nd=1.63 and vd=35.7; the second meniscus positive lens adopts FCD515 material with nd=1.59 and vd=68.6; the biconcave negative lens adopts H-ZLAF76 material with nd=1.85 and vd=30.1; and the second biconvex positive lens adopts H-QK3L material with nd=1.49 and vd=70.4.

[0033] Further, the F number of the overall structure of the first meniscus positive lens, the first meniscus negative lens, the second meniscus negative lens, the plano-concave lens, the third meniscus negative lens, the first biconvex positive lens, the second meniscus positive lens, the biconcave negative lens and the second biconvex positive lens is 15.7.

[0034] The present application has the following advantages:

[0035] 1. The wide-angle optical lens provided by the present application is composed of 9 lenses, the number of lenses is reasonable, the optical power of each lens is reasonably distributed, and the proportional relationship of f1, f2, f3, f4, f5, f6, f7, f8, f9 and f is set respectively, so that the lens aberration is optimized, the optical lens has the performances of large field of view and low distortion at the same time, and the market competitiveness is improved. The present application can be used for a target surface with a diameter of 22mm (1280x1280, pixel size 12.5um), can realize a field of view of ±47.5°, has good imaging function at a resolution of 40lp / mm, and greatly improves the target detection capability.

[0036] 2. The glass materials with different dispersion coefficients are reasonably selected in the present application, so that the structure of the whole wide-angle optical lens is compact and reasonable, the distortion can be further reduced, and the chromatic aberration can be reduced. In addition, the ratio of the back focal length BFL of the optical lens to the focal length f can achieve an effect of greater than or equal to 2. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic diagram of an embodiment of the wide-angle optical lens of the present application;

[0038] Figure 2 is a modulation transfer function diagram of the embodiment of the present application;

[0039] Figure 3 is a point column diagram of the embodiment of the present application;

[0040] Figure 4 is a field curvature graph of an embodiment of the present application;

[0041] Figure 5 is a distortion graph of an embodiment of the present application;

[0042] Figure 6 is a ray aberration graph of an embodiment of the present application in the range of 0-33.6°;

[0043] Figure 7 is a ray aberration graph of an embodiment of the present application in the range of 37.57-47.52°.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] L1 - first meniscus positive lens, L2 - first meniscus negative lens, L3 - second meniscus negative lens, L4 - plano-concave lens, L5 - third meniscus negative lens, L6 - first double convex positive lens, L7 - second meniscus positive lens, L8 - double concave negative lens, L9 - second double convex positive lens, STO - stop, IMA - image plane. DETAILED DESCRIPTION

[0046] The wide-angle optical lens comprises a first meniscus positive lens L1, a first meniscus negative lens L2, a second meniscus negative lens L3, a plano-concave lens L4, a third meniscus negative lens L5, a first double-convex positive lens L6, a second meniscus positive lens L7, a double-concave negative lens L8 and a second double-convex positive lens L9 arranged in sequence from an object plane to an image plane along the direction of propagation of incident light. Specifically, the entrance surface of the first meniscus positive lens L1 is convex, the exit surface of the first meniscus positive lens L1 is concave, the entrance surface of the first meniscus negative lens L2 is convex, the exit surface of the first meniscus negative lens L2 is concave, the entrance surface of the second meniscus negative lens L3 is convex, the exit surface of the second meniscus negative lens L3 is concave, the entrance surface of the plano-concave lens L4 is concave, the exit surface of the plano-concave lens L4 is flat, the entrance surface of the third meniscus negative lens L5 is convex, the exit surface of the third meniscus negative lens L5 is concave, the entrance surface of the first double-convex positive lens L6 is convex, the exit surface of the first double-convex positive lens L6 is convex, the entrance surface of the second meniscus positive lens L7 is concave, the exit surface of the second meniscus positive lens L7 is convex, the entrance surface of the double-concave negative lens L8 is concave, the exit surface of the double-concave negative lens L8 is concave, the entrance surface of the second double-convex positive lens L9 is convex, the exit surface of the second double-convex positive lens L9 is convex, the exit surface of the third meniscus negative lens L5 is cemented with the entrance surface of the first double-convex positive lens L6, and a light stop STO is arranged between the first double-convex positive lens L6 and the second meniscus positive lens L7. Wherein, the entrance surface of the first meniscus positive lens L1 is denoted as S1, the exit surface of the first meniscus positive lens L1 is denoted as S2, the entrance surface of the first meniscus negative lens L2 is denoted as S3, the exit surface of the first meniscus negative lens L2 is denoted as S4, the entrance surface of the second meniscus negative lens L3 is denoted as S5, the exit surface of the second meniscus negative lens L3 is denoted as S6, the entrance surface of the plano-concave lens L4 is denoted as S7, the exit surface of the plano-concave lens L4 is denoted as S8, the entrance surface of the third meniscus negative lens L5 is denoted as S9, the exit surface of the third meniscus negative lens L5 and the entrance surface of the first double-convex positive lens L6 are denoted as S10, the exit surface of the first double-convex positive lens L6 is denoted as S11, the entrance surface of the second meniscus positive lens L7 is denoted as S12, the exit surface of the second meniscus positive lens L7 is denoted as S13, the entrance surface of the double-concave negative lens L8 is denoted as S14, the exit surface of the double-concave negative lens L8 is denoted as S15, the entrance surface of the second double-convex positive lens L9 is denoted as S16, the exit surface of the second double-convex positive lens L9 is denoted as S17, and the specific arrangement is shown in Figure 1

[0047] ​The focal length f1 of the first meniscus positive lens L1, the focal length f2 of the first meniscus negative lens L2, the focal length f3 of the second meniscus negative lens L3, the focal length f4 of the plano-concave lens L4, the focal length f5 of the third meniscus negative lens L5, the focal length f6 of the first double convex positive lens L6, the focal length f7 of the second meniscus positive lens L7, the focal length f8 of the double concave negative lens L8, and the focal length f9 of the second double convex positive lens L9 satisfy the following relationships: 2.60 < f1 / f < 3.60, -1.20 < f2 / f < -1.00, -1.00 < f3 / f < -0.80, -2.50 < f4 / f < -1.80, -0.4 < f5 / f < -0.2, 0.2 < f6 / f < 0.4, 0.70 < f7 / f < 0.90, -0.90 < f8 / f < -0.60, and 1.00 < f9 / f < 1.20, respectively, between the focal length f of the entire structure composed of the first meniscus positive lens L1, the first meniscus negative lens L2, the second meniscus negative lens L3, the plano-concave lens L4, the third meniscus negative lens L5, the first double convex positive lens L6, the second meniscus positive lens L7, the double concave negative lens L8, and the second double convex positive lens L9. In this embodiment, f = 20 mm, f1 = 63.6, f2 = -22.8, f3 = -19.12, f4 = -44.85, f5 = -6.5, f6 = 5.8, f7 = 16.6, f8 = -17.7, and f9 = 22.6. The first meniscus positive lens L1, the first meniscus negative lens L2, and the second meniscus negative lens L3 are made of H-ZLAF68N material having nd = 1.88 and vd = 39.2, the plano-concave lens L4 is made of H-ZF52 material having nd = 1.85 and vd = 23.8, the third meniscus negative lens L5 is made of H-ZLAF4LA material having nd = 1.91 and vd = 35.3, the first double convex positive lens L6 is made of H-F13 material having nd = 1.63 and vd = 35.7, the second meniscus positive lens L7 is made of FCD515 material having nd = 1.59 and vd = 68.6, the double concave negative lens L8 is made of H-ZLAF76 material having nd = 1.85 and vd = 30.1, and the second double convex positive lens L9 is made of H-QK3L material having nd = 1.49 and vd = 70.4. The F number of the entire structure composed of the first meniscus positive lens L1, the first meniscus negative lens L2, the second meniscus negative lens L3, the plano-concave lens L4, the third meniscus negative lens L5, the first double convex positive lens L6, the second meniscus positive lens L7, the double concave negative lens L8, and the second double convex positive lens L9 is 15.7.

[0048] In this embodiment, the surface curvature radius of each lens, the interval between adjacent surfaces along the light path propagation direction from the entrance surface of the first meniscus positive lens L1 to the image surface IMA, and the material of each lens are shown in Table 1.

[0049] Table 1

[0050] Surface No. Radius of curvature / mm Interval between current and next surface / mm Material S1 28.390 8.67 H-ZLAF 68N S2 49.366 0.10 S3 17.024 1.31 H-ZLAF 68N S4 8.880 2.85 S5 16.332 0.80 H-ZLAF 68N S6 8.097 3.38 S7 -37.756 9.00 H-ZF 52 S8 Infinite 0.10 S9 15.659 2.35 H-ZLAF 4LA S10 4.000 4.30 H-F 13 S11 -22.059 0.35 STO Infinite 1.82 S12 -19.377 1.66 FCD 515 S13 -6.732 3.71 S14 -44.333 0.80 H-ZLAF 76 S15 22.776 2.26 S16 46.596 4.53 H-QK 3L S17 -13.984 40.00

[0051] The technical index realized by the embodiment is as follows:

[0052] (1) Field of view: ±47.5°

[0053] (2) Working wave band: 617±10nm

[0054] (3) Optical total length TTL≤53mm, optical back intercept≥40mm

[0055] (4) Optical distortion≤1%.

[0056] Figure 2 is a modulation transfer function diagram of the embodiment of the application, from Figure 2 It can be seen that the MTF at 40lp / mm in the full field of view is greater than 0.35, and the image quality is good, and the production demand can be met. Figure 3 is a point column diagram of the embodiment of the application, from Figure 3 It can be seen that the point diagram RMS radius in the full field of view is less than 5um, and the geometric radius is less than 10um, which is better than one pixel. Figure 4 is a field curvature diagram of the embodiment of the application, from Figure 4 It can be seen that the field curvature is less than 0.1mm, the astigmatism is less than 0.2mm, and the image surface is flat. Figure 5 is a distortion diagram of the embodiment of the application, from Figure 5 It can be seen that the distortion in the full field of view is less than 1%, which meets the industrial production demand. Figure 6 and Figure 7 are ray aberration curve diagrams of the embodiment of the application in the range of 0~47.52°, from Figure 6 and Figure 7 It can be seen that the ray aberration curve is smooth, there is no obvious edge lifting, the rate of chromatic aberration is less than 4um, and the image quality is good.

[0057] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any change or replacement within the technical range disclosed by the application should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A wide-angle optical lens, characterized in that: The system includes a first meniscus positive lens (L1), a first meniscus negative lens (L2), a second meniscus negative lens (L3), a plano-concave lens (L4), a third meniscus negative lens (L5), a first biconvex positive lens (L6), a second meniscus positive lens (L7), a biconcave negative lens (L8), and a second biconvex positive lens (L9) arranged sequentially from the object plane to the image plane along the direction of incident light propagation, for a total of 9 lenses; The first meniscus positive lens (L1) has a convex incident surface and a concave exit surface; the first meniscus negative lens (L2) has a convex incident surface and a concave exit surface; the second meniscus negative lens (L3) has a convex incident surface and a concave exit surface; the plano-concave lens (L4) has a concave incident surface and a planar exit surface; the third meniscus negative lens (L5) has a convex incident surface and a concave exit surface; the first The biconvex positive lens (L6) has a convex incident surface and a convex exit surface; the second meniscus positive lens (L7) has a concave incident surface and a convex exit surface; the biconcave negative lens (L8) has a concave incident surface and a concave exit surface; the second biconvex positive lens (L9) has a convex incident surface and a convex exit surface; the exit surface of the third meniscus negative lens (L5) is cemented to the incident surface of the first biconvex positive lens (L6). The focal lengths f1 of the first meniscus positive lens (L1), f2 of the first meniscus negative lens (L2), f3 of the second meniscus negative lens (L3), f4 of the plano-concave lens (L4), f5 of the third meniscus negative lens (L5), f6 of the first biconvex positive lens (L6), f7 of the second meniscus positive lens (L7), f8 of the biconcave negative lens (L8), and f9 of the second biconvex positive lens (L9) satisfy the following relationship with the focal length f of the overall structure formed by the first meniscus positive lens (L1), the first meniscus negative lens (L2), the second meniscus negative lens (L3), the plano-concave lens (L4), the third meniscus negative lens (L5), the first biconvex positive lens (L6), the second meniscus positive lens (L7), the biconcave negative lens (L8), and the second biconvex positive lens (L9): 2.60 <f1 / f<3.60,-1.20<f2 / f<-1.00,-1.00<f3 / f<-0.80,-2.50<f4 / f<-1.80,-0.4<f5 / f<-0.2,0.2<f6 / f<0.4,0.70<f7 / f<0.90,-0.90<f8 / f<-0.60,1.00<f9 / f<1.20。 2. The wide-angle optical lens according to claim 1, characterized in that: The first positive meniscus lens (L1), the first negative meniscus lens (L2), and the second negative meniscus lens (L3) are all made of optical glass material with a refractive index of 1.87 ≤ refractive index nd ≤ 1.90 and an Abbe number of 38 ≤ vd ≤ 41; the plano-concave lens (L4) is made of optical glass material with a refractive index of 1.80 ≤ nd ≤ 1.85 and an Abbe number of 23 ≤ vd ≤ 25; the third negative meniscus lens (L5) is made of optical glass material with a refractive index of 1.89 ≤ nd ≤ 1.91 and an Abbe number of 34 ≤ vd ≤ 38; the first biconvex lens... The positive lens (L6) is made of optical glass material with 1.61≤nd≤1.65 and 34≤vd≤37; the second meniscus positive lens (L7) is made of optical glass material with 1.58≤nd≤1.60 and 66≤vd≤69; the biconcave negative lens (L8) is made of optical glass material with 1.84≤nd≤1.86 and 29≤vd≤31; and the second biconvex positive lens (L9) is made of optical glass material with 1.47≤nd≤1.50 and 66≤vd≤71.

3. The wide-angle optical lens according to claim 2, characterized in that: It also includes an aperture stop (STO) disposed between the first biconvex positive lens (L6) and the second meniscus positive lens (L7).

4. The wide-angle optical lens according to claim 3, characterized in that: The intervals between adjacent surfaces along the optical path propagation direction from the incident surface of the first meniscus lens (L1) to the image plane (IMA) are successively 8.57–8.77 mm, 0.05–0.20 mm, 1.21–1.41 mm, 2.75–2.95 mm, 0.70–0.90 mm, 3.28–3.48 mm, 8.90–9.10 mm, 0.05–0.20 mm, 2.25–2.45 mm, 4.20–4.40 mm, 0.25–0.45 mm, 1.72–1.92 mm, 1.56–1.76 mm, 3.61–3.81 mm, 0.70–0.90 mm, 2.16–2.36 mm, 4.43–4.63 mm, and 39.90–40.10 mm.

5. The wide-angle optical lens according to claim 4, characterized in that: The first meniscus lens (L1) has an incident surface radius of curvature of 27.038 mm to 29.884 mm and an exit surface radius of curvature of 47.019 mm to 51.968 mm. The first meniscus negative lens (L2) has an incident surface radius of curvature of 16.210 mm to 17.916 mm and an exit surface radius of curvature of 8.457 mm to 9.347 mm. The second meniscus negative lens (L3) has an incident surface radius of curvature of 15.552 mm to 17.189 mm and an exit surface radius of curvature of 7.714 mm to 8.526 mm. The incident surface radius of curvature of the plano-concave lens (L4) is -39.747mm to -35.962mm, and the exit surface radius of curvature is infinite. The radius of curvature of the incident surface of the third meniscus negative lens (L5) is 14.914 mm to 16.484 mm, and the radius of curvature of the exit surface is the same as that of the first biconvex positive lens (L6) at 3.810 mm to 4.211 mm. The radius of curvature of the exit surface of the first biconvex positive lens (L6) is -23.221 mm to -21.010 mm. The surface radius of curvature of the aperture stop (STO) is infinite; The second meniscus lens (L7) has an incident surface radius of curvature of -20.400mm to -18.457mm and an exit surface radius of curvature of -7.084mm to -6.410mm. The incident surface radius of curvature of the biconcave negative lens (L8) is -46.663mm to -42.219mm, and the exit surface radius of curvature is 21.695mm to 23.979mm. The second biconvex positive lens (L9) has an incident surface radius of curvature of 44.381 mm to 49.053 mm and an exit surface radius of curvature of -14.716 mm to -13.314 mm.

6. The wide-angle optical lens according to claim 5, characterized in that: The first meniscus lens (L1) has an incident surface radius of curvature of 28.390 mm and an exit surface radius of curvature of 49.366 mm. The first meniscus negative lens (L2) has an incident surface radius of curvature of 17.024 mm and an exit surface radius of curvature of 8.880 mm. The second meniscus negative lens (L3) has an incident surface radius of curvature of 16.332 mm and an exit surface radius of curvature of 8.097 mm. The radius of curvature of the incident surface of the plano-concave lens (L4) is -37.756 mm; The radius of curvature of the incident surface of the third meniscus negative lens (L5) is 15.659 mm, and the radius of curvature of the exit surface is the same as that of the incident surface of the first biconvex positive lens (L6) at 4.000 mm. The radius of curvature of the exit surface of the first biconvex positive lens (L6) is -22.059 mm. The second meniscus lens (L7) has an incident surface radius of curvature of -19.377 mm and an exit surface radius of curvature of -6.732 mm. The incident surface radius of curvature of the biconcave negative lens (L8) is -44.333 mm, and the exit surface radius of curvature is 22.776 mm. The second biconvex positive lens (L9) has an incident surface radius of curvature of 46.596 mm and an exit surface radius of curvature of -13.984 mm.

7. The wide-angle optical lens according to claim 6, characterized in that: The intervals between adjacent surfaces along the optical path propagation direction from the incident surface of the first meniscus lens (L1) to the image plane (IMA) are successively 8.67mm, 0.10mm, 1.31mm, 2.85mm, 0.80mm, 3.38mm, 9.00mm, 0.10mm, 2.35mm, 4.30mm, 0.35mm, 1.82mm, 1.66mm, 3.71mm, 0.80mm, 2.26mm, 4.53mm, and 40.00mm.

8. The wide-angle optical lens according to claim 2, characterized in that: The overall structure consisting of the first meniscus positive lens (L1), the first meniscus negative lens (L2), the second meniscus negative lens (L3), the plano-concave lens (L4), the third meniscus negative lens (L5), the first biconvex positive lens (L6), the second meniscus positive lens (L7), the biconcave negative lens (L8), and the second biconvex positive lens (L9) has an F-number ≤16.

9. The wide-angle optical lens according to claim 8, characterized in that: The first meniscus positive lens (L1), the first meniscus negative lens (L2), and the second meniscus negative lens (L3) are all made of H-ZLAF68N material with nd=1.88 and vd=39.2; the plano-concave lens (L4) is made of H-ZF52 material with nd=1.85 and vd=23.8; the third meniscus negative lens (L5) is made of H-ZLAF4LA material with nd=1.91 and vd=35.3; the first double... The convex positive lens (L6) is made of H-F13 material with nd=1.63 and vd=35.7; the second meniscus positive lens (L7) is made of FCD515 material with nd=1.59 and vd=68.6; the biconcave negative lens (L8) is made of H-ZLAF76 material with nd=1.85 and vd=30.1; and the second biconvex positive lens (L9) is made of H-QK3L material with nd=1.49 and vd=70.

4.

10. The wide-angle optical lens according to claim 9, characterized in that: The overall structure consisting of the first meniscus positive lens (L1), the first meniscus negative lens (L2), the second meniscus negative lens (L3), the plano-concave lens (L4), the third meniscus negative lens (L5), the first biconvex positive lens (L6), the second meniscus positive lens (L7), the biconcave negative lens (L8), and the second biconvex positive lens (L9) has an F-number of 15.7.

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