Intelligent traffic lens with large target surface, high light transmission and high resolution

Abstract

The invention discloses an intelligent traffic lens with a large target surface, large light transmission and high resolution, and an optical system of the traffic lens is composed of a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a diaphragm C, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11 and an image plane IMG which are sequentially arranged along an incident light path. The first lens L1 to the seventh lens L7 form a front group lens; the eighth lens L8 to the eleventh lens L11 form a rear group lens; the sixth lens L6 and the seventh lens L7 form a first glued lens group; and the ninth lens L9 and the tenth lens L10 form a second cemented lens group. The traffic lens provided by the invention has the characteristics of large target surface, high light transmission and high resolution.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical lenses, and particularly relates to an intelligent transportation lens with a large image plane, large light transmission, and high resolution. Background Art

[0002] In an intelligent transportation system, the accuracy of information acquisition directly depends on the precise image data acquisition capabilities of the front-end camera and the lens it is equipped with.

[0003] Given the specific requirements of this system, the equipped lens needs to exhibit performance characteristics beyond the norm, specifically manifested as a large image plane, large light transmission, and high clarity.

[0004] However, current intelligent transportation lenses on the market still have deficiencies in fully meeting the requirements of a large image plane, large light transmission, and high clarity. At the same time, the market demand for lenses with these characteristics is continuously increasing.

[0005] Therefore, developing a lens that can fully meet the above requirements has become an urgent task at present. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides an intelligent transportation lens with a large image plane, large light transmission, and high resolution.

[0007] To achieve the above object, the present invention provides the following technical solution: An intelligent transportation lens with a large image plane, large light transmission, and high resolution, the optical system of the transportation lens consists of a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a diaphragm C, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, and an image plane IMG arranged in sequence along the incident light path. The first lens L1 is a biconvex positive lens; The second lens L2 is a meniscus negative lens with a concave surface facing the image side; The third lens L3 is a biconcave negative lens; The fourth lens L4 is a biconvex positive lens or a meniscus positive lens with a convex surface facing the image side; The fifth lens L5 is a biconvex positive lens; The sixth lens L6 is a biconvex positive lens; The seventh lens L7 is a biconcave negative lens; The eighth lens L8 is a biconvex positive lens; The ninth lens L9 is a biconvex positive lens; The tenth lens L10 is a biconcave negative lens; The eleventh lens L11 is a biconvex positive lens or a meniscus positive lens with a convex surface facing the object side; The first lens L1 to the seventh lens L7 form the front lens group; the eighth lens L8 to the eleventh lens L11 form the rear lens group; The sixth lens L6 and the seventh lens L7 form the first cemented lens group; the ninth lens L9 and the tenth lens L10 form the second cemented lens group; The traffic lens satisfies the following conditional formula: 2.7 ≤ |f u1 / f u2 | ≤ 7.0, where f u1 represents the effective focal length of the front lens group; f u2 represents the effective focal length of the rear lens group; at the same time, the traffic lens also satisfies the following conditional formula: 107 ≤ (FOV × f) / IH ≤ 111, where FOV represents the maximum field of view angle of the traffic lens; IH represents the maximum image plane height of the traffic lens, and f represents the effective focal length of the traffic lens.

[0008] As a specific implementation manner, the traffic lens also satisfies the following conditional formula: 0.07 ≤ D / TTL ≤ 0.09, where D represents the distance between the two lenses before and after the aperture C; TTL represents the total optical length of the traffic lens.

[0009] As a specific implementation manner, the eleventh lens L11 satisfies the following condition: -1.1 ≤ (R 111 -R 112 ) / (R 111 +R 112 ) ≤ -0.5, where R 111 represents the curvature radius of the object side of the eleventh lens L11; R 112 represents the curvature radius of the image side of the eleventh lens L11.

[0010] As a specific implementation manner, the traffic lens also satisfies the following conditional formula: 46 ≤ |V d6 -V d7 | ≤ 47; V d6 represents the Abbe number of the sixth lens L6; V d7 represents the Abbe number of the seventh lens L7.

[0011] As a specific embodiment, in the optical system of the traffic lens, when the fourth lens L4 is a biconvex positive lens and the eleventh lens L11 is a meniscus positive lens with its convex surface facing the object side, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 8.3000 mm; the air distance from the third lens L3 to the fourth lens L4 is 6.5282 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.2807 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the diaphragm C is 8.8527 mm; the air distance from the diaphragm C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000 mm; the air distance from the eleventh lens L11 to the image plane IMG is 14.0848 mm.

[0012] As a specific embodiment, in the optical system of the traffic lens, when the fourth lens L4 is a meniscus positive lens with its convex surface facing the image side and the eleventh lens L11 is a meniscus positive lens with its convex surface facing the object side, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 9.1646 mm; the air distance from the third lens L3 to the fourth lens L4 is 8.0495 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.3355 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the diaphragm C is 7.9974 mm; the air distance from the diaphragm C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000 mm; the air distance from the eleventh lens L11 to the image plane IMG is 12.9052 mm.

[0013] As a specific embodiment, in the optical system of the traffic lens, when the fourth lens L4 is a biconvex positive lens and the eleventh lens L11 is a biconvex positive lens, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 8.5914 mm; the air distance from the third lens L3 to the fourth lens L4 is 5.9351 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 13.1259 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the diaphragm C is 8.8884 mm; the air distance from the diaphragm C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.4420 mm; the air distance from the eleventh lens L11 to the image plane IMG is 15.2816 mm.

[0014] Compared with the prior art, the present invention provides an intelligent traffic lens with a large target surface, large light transmission, and high resolution, and has the following beneficial effects: 1) By reasonably distributing the positions of the lenses in the optical system, the present invention realizes a large target surface while maintaining the optical performance of the lens; 2) By introducing a cemented lens into the imaging system, the present invention optimizes the optical performance and reduces the chromatic aberration of imaging; 3) By reasonably distributing the positions of the lenses with different optical powers, the present invention ensures the clarity of the image; 4) By reasonably setting the maximum field of view angle and focal length of the lens, the imaging quality of the lens is improved; 5) By reasonably adjusting the distance between the diaphragm and the adjacent front and rear lenses, the requirement for large light transmission is met; 6) By reasonably distributing the optical powers of the front group and the rear group, that is, requiring 2.7 ≤ |f u1 / f u2 | ≤ 7.0, the requirement for clear imaging of a large target surface is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the optical path diagram of the intelligent traffic lens with a large target surface, large light transmission, and high resolution in Embodiment 1; Figure 2 is the MTF curve diagram in the visible light band of the intelligent traffic lens with a large target surface, large light transmission, and high resolution in Embodiment 1; Figure 3 is the field curvature distortion diagram of the intelligent traffic lens with a large target surface, large light transmission, and high resolution in Embodiment 1; Figure 4 is the relative illumination curve diagram of the intelligent traffic lens with a large target surface, large light transmission, and high resolution in Embodiment 1; Figure 5 Axial aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 1; Figure 6 Lateral chromatic aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 1; Figure 7 Optical path diagram of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 8 MTF curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 9 Field curvature and distortion diagram of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 10 Relative illumination curve of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 11 Axial aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 12 Lateral chromatic aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 2; Figure 13 Optical path diagram of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3; Figure 14 MTF curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3; Figure 15 Field curvature and distortion diagram of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3; Figure 16 Relative illumination curve of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3; Figure 17 Axial aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3; Figure 18 Lateral chromatic aberration curve of the visible light band of the intelligent transportation lens with a large target surface, large light transmission, and high resolution in Example 3. Detailed implementation manners

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] An intelligent transportation lens with a large target surface, large light transmission, and high resolution. The optical system of the transportation lens consists of a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a diaphragm C, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, and an image plane IMG arranged in sequence along the incident light path. The first lens L1 is a biconvex positive lens; the second lens L2 is a meniscus negative lens with a concave surface facing the image side; the third lens L3 is a biconcave negative lens; the fourth lens L4 is a biconvex positive lens or a meniscus positive lens with a convex surface facing the image side; the fifth lens L5 is a biconvex positive lens; the sixth lens L6 is a biconvex positive lens; the seventh lens L7 is a biconcave negative lens; the eighth lens L8 is a biconvex positive lens; the ninth lens L9 is a biconvex positive lens; the tenth lens L10 is a biconcave negative lens; the eleventh lens L11 is a biconvex positive lens or a meniscus positive lens with a convex surface facing the object side.

[0018] The first lens L1 to the seventh lens L7 form the front lens group; the eighth lens L8 to the eleventh lens L11 form the rear lens group. The sixth lens L6 and the seventh lens L7 form the first cemented lens group; the ninth lens L9 and the tenth lens L10 form the second cemented lens group.

[0019] The bending shape of the first lens L1 is beneficial for the lens to obtain light at a large angle.

[0020] The second lens L2 is used to diverge the light collected by the first lens L1, enabling the light to smoothly transition to the subsequent optical system and reasonably controlling the optical power.

[0021] The third lens L3 is used to diverge the light collected by the second lens L2, control the focal length of the lens, and simultaneously correct the astigmatism and spherical aberration of the lens to improve the overall performance of the optical system.

[0022] The fourth lens L4 is used to focus the light collected by the third lens L3 and correct the aberration to optimize the imaging performance of the lens group.

[0023] The fifth lens L5 is used to further focus the light collected by the fourth lens L4 and simultaneously correct the chromatic aberration and distortion of the lens to improve the clarity and accuracy of the image.

[0024] The sixth lens L6 and the seventh lens L7 are cemented together, which can diverge light and balance the spherical aberration and axial chromatic aberration of the optical system at the same time.

[0025] The diaphragm C is placed between the cemented lens and the eighth lens L8, and controls the imaging quality and the performance of the optical system by restricting the propagation range and direction of the light beam.

[0026] The eighth lens L8 can focus the light collected by the cemented lens, and at the same time cooperate with the diaphragm C to optimize the depth of field and imaging range of the lens.

[0027] The ninth lens L9 and the tenth lens L10 are cemented together. By using lenses with high and low refractive indices in combination, it is beneficial for the light in the front to transition quickly and compensate for chromatic aberration.

[0028] The eleventh lens L11 can focus the light collected by the cemented lens, while controlling the overall focal length and imaging field of view of the lens group, and improving the overall stability of the optical system.

[0029] The lenses in the following embodiments all adopt lenses made of glass materials with conventional refractive indices.

[0030] Embodiment 1

[0031] In the optical system of this example, the first lens L1 is a biconvex positive lens; the second lens L2 is a meniscus negative lens with the concave surface facing the image side; the third lens L3 is a biconcave negative lens; the fourth lens L4 is a biconvex positive lens; the fifth lens L5 is a biconvex positive lens; the sixth lens L6 is a biconvex positive lens; the seventh lens L7 is a biconcave negative lens; the eighth lens L8 is a biconvex positive lens; the ninth lens L9 is a biconvex positive lens, the tenth lens L10 is a biconcave negative lens, and the eleventh lens L11 is a meniscus positive lens with the convex surface facing the object side. The sixth lens L6 and the seventh lens L7 form the first cemented lens group; the ninth lens L9 and the tenth lens L10 form the second cemented lens group. The optical path diagram of this traffic lens is shown in Figure 1 as shown.

[0032] Referring to Table 1, Table 1 lists the relevant parameters of each lens in this example, including the radius of curvature, thickness, refractive index of the material, and Abbe number: Table 1

[0033] Infinity means infinite.

[0034] In this example, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 8.3000 mm; the air distance from the third lens L3 to the fourth lens L4 is 6.5282 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.2807 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the aperture C is 8.8527 mm; the air distance from the aperture C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000 mm; the air distance from the eleventh lens L11 to the image plane IMG is 14.0848 mm.

[0035] The technical specifications achieved by the optical system in this example are as follows: 1) The maximum field of view of the traffic lens: FOV = 54°; 2) The effective focal length of the front group of lenses: f u1 = -111.7419 mm; 3) The effective focal length of the rear group of lenses: f u2 = 22.9371 mm; 4) The effective focal length of the traffic lens: f = 16.3176 mm; 5) The maximum image plane height of the traffic lens: IH = 8 mm; 6) The radius of curvature of the object side of the eleventh lens L11: R 111 = 21.0430 mm; 7) The radius of curvature of the image side of the eleventh lens L11: R 112 = 77.7000 mm; 8) The Abbe number of the sixth lens L6: V d6 = 81.56; 9) The Abbe number of the seventh lens L7: V d7 = 35.01; 10) The distance between the two lenses before and after the aperture C: D = 9.0527 mm; 11) The total optical length of the traffic lens: TTL = 106.3160 mm.

[0036] Furthermore, we get: |f u1 / f u2 | = 4.8717; (FOV × f) / IH = 110.1438; D / TTL = 0.0851; (R 111 -R 112 ) / (R 111 +R 112) = -0.5738; |V d6 -V d7 | = 46.55。

[0037] Here, by reasonably distributing the optical powers of the front group and the rear group, that is, requiring 2.7 ≤ |f u1 / f u2 | ≤ 7.0, the requirement of clear imaging with a large target surface is achieved.

[0038] By reasonably distributing the optical powers of the front group and the rear group, that is, requiring 2.7 ≤ |f u1 / f u2 | ≤ 7.0, the requirement of clear imaging with a large target surface is achieved.

[0039] By reasonably setting the maximum field of view angle and focal length of the lens, that is, requiring 107 ≤ (FOV × f) / IH ≤ 111, the imaging quality of the lens is improved.

[0040] By reasonably adjusting the distances between the aperture stop and the adjacent front and rear lenses, that is, requiring 0.07 ≤ D / TTL ≤ 0.09, the requirement of large light transmission is further satisfied.

[0041] By reasonably setting the curvature radius of the eleventh lens L11, -1.1 ≤ (R 111 -R 112 ) / (R 111 +R 112 ) ≤ -0.5, the aberration of the lens is reduced and the back focal length of the lens is controlled.

[0042] By reasonably selecting the Abbe numbers of the two lenses forming the cemented lens, that is, 46 ≤ |V d6 -V d7 | ≤ 47, the chromatic aberration of the optical system is effectively reduced.

[0043] The final imaging effect of the lens in this example is evaluated by the Figure 2 MTF graph. The MTF curves at each field of view decline smoothly and have good consistency. It can be seen from the graph that at the spatial frequency of 60 pl / mm in the edge field of view, the MTF value is greater than 0.7, indicating that the lens has good imaging effect and resolution within the full field of view angle. From Figure 3 the field curvature and distortion graph, it can be seen that the distortion of the lens does not exceed 3.5%; from Figure 4 the relative illumination curve, it can be seen that in the case of the maximum field of view, the relative illumination value of the lens is greater than 0.55; Figure 5 This is the axial aberration graph of the lens in this embodiment. It can be seen that the maximum axial aberration does not exceed 0.06 mm and the imaging quality is good; Figure 6 This is the lateral chromatic aberration curve graph. It can be seen that the lateral chromatic aberration is less than 2.5 μm.

[0044] Embodiment 2

[0045] In the optical system of this example, the first lens L1 is a biconvex positive lens; the second lens L2 is a meniscus negative lens with its concave surface facing the image side; the third lens L3 is a biconcave negative lens; the fourth lens L4 is a meniscus positive lens with its convex surface facing the image side; the fifth lens L5 is a biconvex positive lens; the sixth lens L6 is a biconvex positive lens; the seventh lens L7 is a biconcave negative lens; the eighth lens L8 is a biconvex positive lens; the ninth lens L9 is a biconvex positive lens, the tenth lens L10 is a biconcave negative lens, and the eleventh lens L11 is a meniscus positive lens with its convex surface facing the object side. The optical path diagram of this traffic lens is shown in Figure 7 the figure shown.

[0046] Referring to Table 2, Table 2 lists the relevant parameters of each lens in this example, including the radius of curvature, thickness, refractive index of the material, and Abbe number: Table 2

[0047] Infinity means infinite.

[0048] In this example, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 9.1646 mm; the air distance from the third lens L3 to the fourth lens L4 is 8.0495 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.3355 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the aperture stop C is 7.9974 mm; the air distance from the aperture stop C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000 mm; the air distance from the eleventh lens L11 to the image plane IMG is 12.9052 mm.

[0049] The technical indicators achieved by the optical system in this example are as follows: 1) The maximum field of view angle of the traffic lens: FOV = 54°; 2) The effective focal length of the front group of lenses: f u1 = -158.3948 mm; 3) The effective focal length of the rear group of lenses: f u2 = 22.9157 mm; 4) The effective focal length of the traffic lens: f = 16.0955 mm; 5) The maximum image plane height of the traffic lens: IH = 8 mm; 6) The radius of curvature of the object side of the eleventh lens L11: R 111 = 20.5426 mm; 7) Radius of curvature of the image side of the eleventh lens L11: R 112 = 66.9471 mm; 8) Abbe number of the sixth lens L6: V d6 = 81.56; 9) Abbe number of the seventh lens L7: V d7 = 35.01; 10) Spacing between the two lenses before and after the diaphragm C: D = 8.1974 mm; 11) Optical total length of the traffic lens: TTL = 106.6160 mm.

[0050] Furthermore, we get: |f u1 / f u2 | = 6.9121; (FOV × f) / IH = 108.6446; D / TTL = 0.0769; (R 111 - R 112 ) / (R 111 + R 112 ) = -0.5304; |V d6 - V d7 | = 46.55.

[0051] The final imaging effect of the lens in this example is evaluated by Figures 8 - 12 . It can be seen from Figure 8 that the MTF curves under each field of view decline smoothly and have good consistency. It can be seen from the figure that at the spatial frequency of 60 pl / mm in the edge field of view, the MTF value is greater than 0.6, indicating that the lens has good imaging effect and resolution within the full field of view angle. It can be seen from Figure 9 of the field curvature and distortion diagram that the distortion of the lens does not exceed 3.5%; it can be seen from Figure 10 of the relative illumination curve that in the case of the maximum field of view, the relative illumination value of the lens is greater than 0.55; Figure 11 is the axial aberration diagram of the lens in this embodiment. It can be seen that the maximum axial aberration does not exceed 0.07 mm and the imaging quality is good; Figure 12 is the lateral chromatic aberration curve diagram. It can be seen that the lateral chromatic aberration is less than 6 μm.

[0052] Embodiment 3

[0053] In the optical system of this example, the first lens L1 is a biconvex positive lens; the second lens L2 is a meniscus negative lens with a concave surface facing the image side; the third lens L3 is a biconcave negative lens; the fourth lens L4 is a biconvex positive lens; the fifth lens L5 is a biconvex positive lens; the sixth lens L6 is a biconvex positive lens; the seventh lens L7 is a biconcave negative lens; the eighth lens L8 is a biconvex positive lens; the ninth lens L9 is a biconvex positive lens, the tenth lens L10 is a biconcave negative lens, and the eleventh lens L11 is a biconvex positive lens. The optical path diagram of this traffic lens is shown in Figure 13 the figure shown.

[0054] Refer to Table 3, which lists the relevant parameters of each lens in this example, including the radius of curvature, thickness, refractive index of the material, and Abbe number: Table 3

[0055] Infinity means infinite.

[0056] In this example, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 8.5914 mm; the air distance from the third lens L3 to the fourth lens L4 is 5.9351 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 13.1259 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the aperture stop C is 8.8884 mm; the air distance from the aperture stop C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.4420 mm; the air distance from the eleventh lens L11 to the image plane IMG is 15.2816 mm.

[0057] The technical indicators achieved by the optical system in this example are as follows: 1) The maximum field of view angle of the traffic lens: FOV = 54°; 2) The effective focal length of the front group of lenses: f u1 = -62.2276 mm; 3) The effective focal length of the rear group of lenses: f u2 = 22.4452 mm; 4) The effective focal length of the traffic lens: f = 16.0249 mm; 5) The maximum image plane height of the traffic lens: IH = 8 mm; 6) The radius of curvature of the object side of the eleventh lens L11: R 111 = 27.3211 mm; 7) The radius of curvature of the image side of the eleventh lens L11: R 112= -579.4052 mm; 8) Abbe number of the sixth lens L6: V d6 = 81.56; 9) Abbe number of the seventh lens L7: V d7 = 35.01; 10) Spacing between the two lenses before and after the diaphragm C: D = 9.0884 mm; 11) Optical total length of the traffic lens: TTL = 106.4990 mm.

[0058] Furthermore, we get: |f u1 / f u2 | = 2.7724; (FOV × f) / IH = 108.1681; D / TTL = 0.0853; (R 111 -R 112 ) / (R 111 +R 112 ) = -1.0990; |V d6 -V d7 | = 46.55.

[0059] The final imaging effect of the lens in this example is evaluated by Figures 14 - 18 . It can be seen from Figure 14 that the MTF curves under each field of view decline smoothly and have good consistency. It can be seen from the figure that at the spatial frequency of 60 pl / mm in the marginal field of view, the MTF value is greater than 0.7, indicating that the lens has good imaging effect and resolution within the full field of view angle. It can be seen from Figure 15 of the field curvature and distortion diagram that the distortion of the lens does not exceed 3%; it can be seen from Figure 16 of the relative illumination curve that in the case of the maximum field of view, the relative illumination value of the lens is greater than 0.5; Figure 17 is the axial aberration diagram of the lens in this embodiment. It can be seen that the maximum axial aberration does not exceed 0.08 mm and the imaging quality is good; Figure 18 is the lateral chromatic aberration curve diagram. It can be seen that the lateral chromatic aberration is less than 3 μm.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent traffic lens with large target area, large light transmission and high resolution, characterized in that: The optical system of the traffic lens is composed of a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an aperture C, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11 and an image plane IMG, which are sequentially arranged along the incident light path. The first lens L1 is a biconvex positive lens; The second lens L2 is a negative meniscus lens with a concave surface facing the image side; The third lens L3 is a double concave negative lens; The fourth lens L4 is a biconvex positive lens or a meniscus positive lens with the convex surface facing the image side; The fifth lens L5 is a biconvex positive lens; The sixth lens L6 is a biconvex positive lens; The seventh lens L7 is a double concave negative lens; The eighth lens L8 is a biconvex positive lens; The ninth lens L9 is a biconvex positive lens; The tenth lens L10 is a double concave negative lens; The eleventh lens L11 is a biconvex positive lens or a meniscus positive lens with the convex surface facing the object side; The first lens L1 to the seventh lens L7 form a front lens group; the eighth lens L8 to the eleventh lens L11 form a rear lens group; The sixth lens L6 and the seventh lens L7 form a first cemented lens group; the ninth lens L9 and the tenth lens L10 form a second cemented lens group; The traffic lens satisfies the following condition: 2.7≤|f u1 / f u2 |≤7.0, where f u1 Indicates the effective focal length of the front lens group; f u2 represents the effective focal length of the rear lens group; at the same time, the traffic lens also satisfies the following condition: 107≤(FOV×f) / IH≤111, wherein FOV represents the maximum field of view of the traffic lens; IH represents the maximum image plane height of the traffic lens, and f represents the effective focal length of the traffic lens.

2. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: The traffic lens also satisfies the following conditional formula: 0.07≤D / TTL≤0.09, wherein D represents the distance between the two lenses before and after the aperture C; and TTL represents the total optical length of the traffic lens.

3. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: The eleventh lens L11 satisfies the following condition: -1.1≤(R 111 -R 112 ) / (R 111 +R 112 )≤-0.5, where R 111 R represents the curvature radius of the object side of the eleventh lens L11; 112 It represents the curvature radius of the image-side surface of the eleventh lens L11.

4. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: The traffic lens also satisfies the following condition: 46≤|V d6 -V d7 |≤47;V d6 V represents the Abbe number of the sixth lens L6; d7 It represents the Abbe number of the seventh lens L7.

5. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: When the fourth lens L4 is a biconvex positive lens in the optical system of the traffic lens, and the eleventh lens L11 is a meniscus positive lens with the convex surface facing the object, the air distance from the first lens L1 to the second lens L2 is 0.1000mm; the air distance from the second lens L2 to the third lens L3 is 8.3000mm; the air distance from the third lens L3 to the fourth lens L4 is 6.5282mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.2807mm; the air distance from the fifth lens L5 to the fourth lens L4 is 16.2807mm; the air distance from the fifth lens L5 to the fourth lens L4 is 16.2807mm; the air distance from the fifth lens L5 to the fourth lens L4 is 16.2807mm; the air distance from the fourth lens L4 to the fifth lens L5 to the fifth lens L5 is 16.2807mm; the air distance from the fifth lens L5 to the fifth lens L5 is 16.2807mm; the air distance from the first lens L1 to the second lens L2 to the third lens L3 to the fourth lens L4 is 6.5282mm; the air distance from the fourth lens L4 to the fifth lens L5 to the fifth lens L5 is 16.2807mm; the air distance from ... The air distance from the lens L5 to the sixth lens L6 is 0.2000mm; the air distance from the seventh lens L7 to the aperture C is 8.8527mm; the air distance from the aperture C to the eighth lens L8 is 0.2000mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000mm; the air distance from the eleventh lens L11 to the image plane IMG is 14.0848mm.

6. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: When the fourth lens L4 is a positive meniscus lens with its convex surface facing the image side, and the eleventh lens L11 is a positive meniscus lens with its convex surface facing the object side in the optical system of the traffic lens, the air distance from the first lens L1 to the second lens L2 is 0.1000mm; the air distance from the second lens L2 to the third lens L3 is 9.1646mm; the air distance from the third lens L3 to the fourth lens L4 is 8.0495mm; the air distance from the fourth lens L4 to the fifth lens L5 is 16.3355mm ; The air distance from the fifth lens L5 to the sixth lens L6 is 0.2000mm; the air distance from the seventh lens L7 to the aperture C is 7.9974mm; the air distance from the aperture C to the eighth lens L8 is 0.2000mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.0000mm; the air distance from the eleventh lens L11 to the image plane IMG is 12.9052mm.

7. The intelligent traffic lens with large target area, large light transmission and high resolution according to claim 1, characterized in that: When the fourth lens L4 is a biconvex positive lens and the eleventh lens L11 is a biconvex positive lens in the optical system of the traffic lens, the air distance from the first lens L1 to the second lens L2 is 0.1000 mm; the air distance from the second lens L2 to the third lens L3 is 8.5914 mm; the air distance from the third lens L3 to the fourth lens L4 is 5.9351 mm; the air distance from the fourth lens L4 to the fifth lens L5 is 13.1259 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.2000 mm; the air distance from the seventh lens L7 to the aperture C is 8.8884 mm; the air distance from the aperture C to the eighth lens L8 is 0.2000 mm; the air distance from the eighth lens L8 to the ninth lens L9 is 0.1000 mm; the air distance from the tenth lens L10 to the eleventh lens L11 is 1.4420 mm; and the air distance from the eleventh lens L11 to the image plane IMG is 15.2816 mm.

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