Wide-angle optical lens

Abstract

The invention provides a wide-angle optical lens which can solve the problems that an existing wide-angle optical lens is small in target surface and difficult to have a large view field and low distortion at the same time. The lens comprises a first meniscus positive lens, a first meniscus negative lens, a second meniscus negative lens, a plano-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 which are sequentially arranged from an object plane to an image plane along the propagation direction of incident light, the focal length of the first positive meniscus lens is f1, the focal length of the first negative meniscus lens is f2, the focal length of the second negative meniscus lens is f3, the focal length of the plano-concave lens is f4, the focal length of the third negative meniscus lens is f5, the focal length of the first biconvex positive lens is f6, the focal length of the second positive meniscus lens is f7, and the focal length of the biconcave negative lens is f8. The focal length f9 of the second biconvex positive lens and the focal length f of the integral structure formed by the nine lenses meet the following relations: 2.60 lt; f1 / flt; 3.60,-1.20 [mu] m; f2 / flt; 1.00 [mu] m, 1.00 [mu] m; f3 / flt; -0.80,-1.80 [mu] m,-0.80 [mu] F4 / flt; 2.50,-0.4 lt, 2.50,-0.4 lt; f5 / flt; 0.2, 0.2 lt, 0.2 lt; f6 / flt; 0, 0.4, 0.70 lt; f7 / flt; 0.90,-0.90 < lt >,-0.90 < lt >; f8 / flt; 0.60, 1.00 lt, 0.60, 1.00 lt; f9 / flt; 1.20, 1.20.

Description

Technical Field

[0001] The present invention relates to an optical lens, in particular to a wide-angle optical lens. Background Art

[0002] Wide-angle lenses are a classic design, primarily concerned with correcting field curvature and distortion. The overall focal length of wide-angle lenses is distributed with the negative lens group in front and the positive lens group in the back. In industrial production applications such as fabric and paper, wide-angle lenses fixed at a certain distance are often used to rapidly capture fabric or paper, enabling inspection of yield and defects. This inspection of fabric and paper products often places stringent requirements on the distortion control of wide-angle lenses. However, existing wide-angle optical lenses suffer from the following drawbacks: their small target surface makes it difficult to achieve both a large field of view and low distortion. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems of existing wide-angle optical lenses, such as small target surface and difficulty in having a large field of view and low distortion, and to provide a wide-angle optical lens.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A wide-angle optical lens, which is special in that it includes a first meniscus positive lens, a first meniscus negative lens, a second meniscus negative lens, a plano-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, which are arranged in sequence from the object plane to the image plane along the propagation direction of the incident light;

[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 plano-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 biconvex 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 biconcave negative lens is concave, and the exit surface is concave; the incident surface of the second biconvex 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 biconvex 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 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, respectively, and the focal length f of the overall structure consisting 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, satisfy the following relationship: 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<-0.60,1.00<f9 / f<1.20。

[0008] The exit surface of the third meniscus negative lens is glued to the incident surface of the first biconvex positive lens, which can effectively correct the chromatic aberration of the optical lens, reduce the decentration sensitivity of the optical lens, balance the aberration of the optical lens, and improve the imaging quality of the optical lens; it can also reduce the assembly sensitivity of the optical lens, thereby reducing the difficulty of the optical lens processing technology and improving the assembly yield of the optical lens.

[0009] Furthermore, the first meniscus positive lens, the first meniscus negative lens and the second meniscus negative lens all adopt optical glass materials with a refractive index of 1.87≤nd≤1.90 and an Abbe number of 38≤vd≤41; the plano-concave lens adopts an optical glass material with a refractive index of 1.80≤nd≤1.85 and a refractive index of 23≤vd≤25; the third meniscus negative lens adopts an optical glass material with a refractive index of 1.89≤nd≤1.91 and a refractive index of 34≤vd≤38; the first biconvex positive lens adopts an optical glass material with a refractive index of 1.61≤nd≤1.65 and a refractive index of 34≤vd≤37; the second meniscus positive lens adopts an optical glass material with a refractive index of 1.58≤nd≤1.60 and a refractive index of 66≤vd≤69; the biconcave negative lens adopts an optical glass material with a refractive index of 1.84≤nd≤1.86 and a refractive index of 29≤vd≤31; and the second biconvex positive lens adopts an optical glass material with a refractive index of 1.47≤nd≤1.50 and a refractive index of 66≤vd≤71.

[0010] Furthermore, it also includes an aperture arranged between the first biconvex positive lens and the second meniscus positive lens.

[0011] The iris is used to limit the light beam, which can reduce the generation of astigmatism in the optical lens and improve image quality. The iris is set in the middle of the entire optical lens, so that the light can transition to the rear group more smoothly and reach the image plane at a smaller angle, which helps to improve the relative illumination of the entire optical lens.

[0012] Furthermore, the intervals between adjacent surfaces along the direction of optical propagation from the incident surface to the image plane of the first meniscus positive lens are 8.57~8.77mm, 0.05~0.20mm, 1.21~1.41mm, 2.75~2.95mm, 0.70~0.90mm, 3.28~3.48mm, 8.90~9.10mm, 0.05~0.20mm, 2.25~2.45mm, 4.20~4.40mm, 0.25~0.45mm, 1.72~1.92mm, 1.56~1.76mm, 3.61~3.81mm, 0.70~0.90mm, 2.16~2.36mm, 4.43~4.63mm, and 39.90~40.10mm respectively.

[0013] Furthermore, the curvature radius of the incident surface of the first meniscus positive lens is 27.038 mm to 29.884 mm, and the curvature radius of the exit surface is 47.019 mm to 51.968 mm;

[0014] The incident surface curvature radius of the first meniscus negative lens is 16.210 mm to 17.916 mm, and the exit surface curvature radius is 8.457 mm to 9.347 mm;

[0015] The incident surface curvature radius of the second meniscus negative lens is 15.552 mm to 17.189 mm, and the exit surface curvature radius is 7.714 mm to 8.526 mm;

[0016] The curvature radius of the incident surface of the plano-concave lens is -35.962mm to -39.747mm, and the curvature radius of the exit surface is infinite;

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

[0018] The surface curvature radius of the aperture is infinite;

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

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

[0021] The curvature radius of the incident surface of the second biconvex positive lens is 44.381 mm to 49.053 mm, and the curvature radius of the exit surface is -13.314 mm to -14.716 mm.

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

[0023] The curvature radius of the incident surface of the first meniscus negative lens is 17.024 mm, and the curvature radius of the exit surface is 8.880 mm;

[0024] The radius of curvature of the incident surface of the second meniscus negative lens is 16.332 mm, and the radius of curvature of the exit surface is 8.097 mm;

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

[0026] The incident surface curvature radius of the third meniscus negative lens is 15.659 mm, and the exit surface curvature radius and the incident surface curvature radius of the first biconvex positive lens are both 4.000 mm. The exit surface curvature radius of the first biconvex positive lens is -22.059 mm.

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

[0028] The incident surface curvature radius of the biconcave negative lens is -44.333 mm, and the exit surface curvature radius is 22.776 mm;

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

[0030] Furthermore, the intervals between adjacent surfaces along the direction of optical propagation from the incident surface to the image plane of the first meniscus positive lens 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, and 40.00mm respectively.

[0031] Furthermore, 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] Furthermore, the first meniscus positive lens, the first meniscus negative lens and the second meniscus negative lens all use H-ZLAF68N material with nd=1.88 and vd=39.2; the plano-concave lens uses H-ZF52 material with nd=1.85 and vd=23.8; the third meniscus negative lens uses H-ZLAF4LA material with nd=1.91 and vd=35.3; the first biconvex positive lens uses H-F13 material with nd=1.63 and vd=35.7; the second meniscus positive lens uses FCD515 material with nd=1.59 and vd=68.6; the biconcave negative lens uses H-ZLAF76 material with nd=1.85 and vd=30.1; and the second biconvex positive lens uses H-QK3L material with nd=1.49 and vd=70.4.

[0033] Furthermore, 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 15.7.

[0034] Beneficial effects of the present invention:

[0035] 1. The present invention provides a wide-angle optical lens composed of nine lenses. This number of lenses is optimized by rationally allocating the optical power of each lens and setting the ratio of f1, f2, f3, f4, f5, f6, f7, f8, and f9 to f. This optimizes lens aberrations, enabling the optical lens to simultaneously achieve a wide field of view and low distortion, thereby enhancing its market competitiveness. The present invention can be used on a target surface with a diameter of 22 mm (1280x1280 pixels, 12.5 μm pixel size), achieving a ±47.5° field of view, and exhibiting excellent imaging performance at a resolution of 40 lp / mm, significantly improving target detection capabilities.

[0036] 2. By rationally selecting glass materials with different Abbe coefficients, the present invention achieves a compact and rational wide-angle optical lens structure, further reducing distortion and chromatic aberration. Furthermore, the ratio of the back focus distance (BFL) of the optical lens to its focal length (f) can be greater than or equal to 2. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0039] Figure 3 is a spot diagram of an embodiment of the present invention;

[0040] Figure 4 is a field curvature diagram of an embodiment of the present invention;

[0041] Figure 5 is a distortion diagram of an embodiment of the present invention;

[0042] Figure 6 : is a light aberration curve diagram within the range of 0 to 33.6° in an embodiment of the present invention;

[0043] Figure 7 37.57-47.52° is a light aberration curve diagram of an embodiment of the present invention.

[0044] Description of reference numerals:

[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 biconvex positive lens, L7-second meniscus positive lens, L8-biconcave negative lens, L9-second biconvex positive lens, STO-aperture, IMA-image plane. DETAILED DESCRIPTION

[0046] A wide-angle optical lens 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, which are arranged in sequence from the object plane to the image plane along the propagation direction of the incident light. Specifically, the incident surface of the first meniscus positive lens L1 is convex, the exit surface of the first meniscus positive lens L1 is concave, the incident surface of the first meniscus negative lens L2 is convex, the exit surface of the first meniscus negative lens L2 is concave, the incident surface of the second meniscus negative lens L3 is convex, the exit surface of the second meniscus negative lens L3 is concave, the incident surface of the plano-concave lens L4 is concave, the exit surface of the plano-concave lens L4 is flat, the incident surface of the third meniscus negative lens L5 is convex, the exit surface of the third meniscus negative lens L5 is concave, the incident surface of the first biconvex positive lens L6 is convex, and the exit surface of the third meniscus negative lens L5 is concave. The surface is convex, the exit surface of the first biconvex positive lens L6 is convex, the incident surface of the second meniscus positive lens L7 is concave, the exit surface of the second meniscus positive lens L7 is convex, the incident surface of the biconcave negative lens L8 is concave, the exit surface of the biconcave negative lens L8 is concave, the incident surface of the second biconvex positive lens L9 is convex, the exit surface of the second biconvex positive lens L9 is convex, the exit surface of the third meniscus negative lens L5 is glued to the incident surface of the first biconvex positive lens L6, and an aperture STO is arranged between the first biconvex positive lens L6 and the second meniscus positive lens L7. Among them, the incident surface of the first meniscus positive lens L1 is recorded as S1, the exit surface of the first meniscus positive lens L1 is recorded as S2, the incident surface of the first meniscus negative lens L2 is recorded as S3, the exit surface of the first meniscus negative lens L2 is recorded as S4, the incident surface of the second meniscus negative lens L3 is recorded as S5, the exit surface of the second meniscus negative lens L3 is recorded as S6, the incident surface of the plano-concave lens L4 is recorded as S7, the exit surface of the plano-concave lens L4 is recorded as S8, the incident surface of the third meniscus negative lens L5 is recorded as S9, and the exit surface of the third meniscus negative lens L5 is recorded as S10. The exit surface of the meniscus negative lens L5 and the incident surface of the first biconvex positive lens L6 are denoted as S10, the exit surface of the first biconvex positive lens L6 is denoted as S11, the incident 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 incident surface of the concave negative lens L8 is denoted as S14, the exit surface of the biconcave negative lens L8 is denoted as S15, the incident surface of the second biconvex positive lens L9 is denoted as S16, and the exit surface of the second biconvex positive lens L9 is denoted as S17. Figure 1 shown.

[0047] 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 respectively satisfy the following relationships 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, - 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, 1.00 < f9 / f < 1.20. In this embodiment, f = 20mm, f1 = 63.6, f2 = - 22.8, f3 = - 19.12, f4 = - 44.85, f5 = - 6.5, f6 = 5.8, f7 = 16.6, f8 = - 17.7, f9 = 22.6. 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 biconvex 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. The second biconvex positive lens L9 is made of H - QK3L material with nd = 1.49 and vd = 70.4. The F - number 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 = 15.7.

[0048] In this embodiment, the surface curvature radii of each lens, the intervals between adjacent surfaces along the optical path propagation direction from the incident surface of the first meniscus positive lens L1 to the image plane IMA, and the materials of each lens are shown in Table 1:

[0049] Table 1

[0050]

[0051] The technical indicators achieved by this embodiment are as follows:

[0052] (1) Field of view: ±47.5°

[0053] (2) Operating band: 617±10nm

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

[0055] (4) Optical distortion ≤1%.

[0056] Figure 2 is a modulation transfer function diagram of an embodiment of the present invention, 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, which can meet production needs. Figure 3 is a point diagram of an embodiment of the present invention, Figure 3 It can be seen that the RMS radius of the full field of view spot diagram 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 an embodiment of the present invention, 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 an embodiment of the present invention, Figure 5 It can be seen that the distortion of the entire field of view is less than 1%, which meets the needs of industrial production. Figure 6 and Figure 7 is a light aberration curve diagram of the embodiment of the present invention in the range of 0 to 47.52°, Figure 6 and Figure 7 It can be seen that the light aberration curve is smooth, there is no obvious warping, the magnification chromatic aberration is less than 4um, and the image quality is good.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention shall be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A wide-angle optical lens, characterized in that: The invention 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 biconvex positive lens (L6), a second meniscus positive lens (L7), a biconcave negative lens (L8) and a second biconvex positive lens (L9) which are arranged in sequence from the object plane to the image plane along the propagation direction of the incident light; The incident surface of the first meniscus positive lens (L1) is convex, and the exit surface is concave; the incident surface of the first meniscus negative lens (L2) is convex, and the exit surface is concave; the incident surface of the second meniscus negative lens (L3) is convex, and the exit surface is concave; the incident surface of the plano-concave lens (L4) is concave, and the exit surface is a plane; the incident surface of the third meniscus negative lens (L5) is convex, and the exit surface is concave; the first The incident surface of the biconvex positive lens (L6) is a convex surface, and the exit surface is a convex surface; the incident surface of the second meniscus positive lens (L7) is a concave surface, and the exit surface is a convex surface; the incident surface of the biconcave negative lens (L8) is a concave surface, and the exit surface is a concave surface; the incident surface of the second biconvex positive lens (L9) is a convex surface, and the exit surface is a convex surface; the exit surface of the third meniscus negative lens (L5) is glued to the incident surface of the first biconvex positive lens (L6); 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 biconvex positive lens (L6), the focal length f7 of the second meniscus positive lens (L7), the focal length f8 of the biconcave negative lens (L8), and the focal length f9 of the second biconvex positive lens (L9) respectively satisfy the following relationship with the focal length f of the overall 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 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,-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<-0.60,1.00<f9 / f<1.20。 2. The wide-angle optical lens according to claim 1, 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 optical glass materials with a refractive index of 1.87≤nd≤1.90 and an Abbe number of 38≤vd≤41; the plano-concave lens (L4) is made of an optical glass material with a refractive index of 1.80≤nd≤1.85 and a vd number of 23≤25; the third meniscus negative lens (L5) is made of an optical glass material with a refractive index of 1.89≤nd≤1.91 and a vd number of 34≤38; the first biconvex lens (L4) is made of an optical glass material with a refractive index of 1.87≤nd≤1.90 and a vd number of 38≤41; The positive lens (L6) is made of an optical glass material with a value of 1.61≤nd≤1.65 and a value of 34≤vd≤37; the second meniscus positive lens (L7) is made of an optical glass material with a value of 1.58≤nd≤1.60 and a value of 66≤vd≤69; the double concave negative lens (L8) is made of an optical glass material with a value of 1.84≤nd≤1.86 and a value of 29≤vd≤31; the second double convex positive lens (L9) is made of an optical glass material with a value of 1.47≤nd≤1.50 and a value of 66≤vd≤71.

3. The wide-angle optical lens according to claim 2, characterized in that: It also includes an aperture stop (STO) arranged 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 positive lens (L1) to the image plane (IMA) 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, and 39.90-40.10 mm respectively.

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

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

7. The wide-angle optical lens according to claim 6, characterized in that: The intervals between adjacent surfaces along the light propagation direction from the incident surface of the first meniscus positive lens (L1) to the image plane (IMA) 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, and 40.00mm respectively.

8. The wide-angle optical lens according to claim 2, characterized in that: The F number 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) is ≤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 double concave negative lens (L8) is made of H-ZLAF76 material with nd=1.85 and vd=30.1; the second double convex 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 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 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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