A miniaturized, high-throughput, high-resolution vehicle side-view lens

Abstract

The present invention discloses a miniaturized, high-light-through, high-resolution vehicle-mounted side-view lens, which comprises, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture C, a fourth lens L4, a fifth lens L5, and a sixth lens L6. The first lens L1 is a meniscus negative lens or a double-concave negative lens with a concave surface facing the object side; the second lens L2 is a meniscus negative lens with a concave surface facing the object side; the third lens L3 is a double-convex positive lens; the fourth lens L4 is a meniscus negative lens or a double-concave negative lens with a concave surface facing the object side; the fifth lens L5 and the sixth lens L6 are both double-convex positive lenses; the fourth lens L4 and the fifth lens L5 are closely connected to form a cemented group. The vehicle-mounted side-view lens of the present invention has the performance of clear imaging, miniaturization, high light-through and high resolution.

Description

Technical Field

[0001] The invention belongs to the technical field of optical lenses, and in particular relates to a miniaturized, high-light-throughput, and high-resolution vehicle-mounted side-view lens. Background Art

[0002] In recent years, with the rapid development of the automotive industry, assisted driving and autonomous driving technologies have emerged. As the core components in this field, the importance of vehicle-mounted cameras has become increasingly prominent. Among them, vehicle-mounted lenses, as key components, play a vital role. In particular, side-view lenses are widely used in parking assistance systems, which significantly improve the convenience and safety of driving. With the popularization and adaptation of side-view lenses in various types of vehicles, users' requirements for lens performance and quality are also constantly increasing. At the same time, due to the increasing complexity of vehicle-mounted systems, the installation space of vehicle-mounted lenses is significantly limited. In order to comply with the development trend of lens miniaturization, the current mainstream vehicle-mounted side-view lens design on the market often needs to compromise between image quality, resolution and cost control. The common vehicle-mounted side-view lenses on the market generally achieve the goal of lens miniaturization by sacrificing resolution, reducing the aperture or increasing material costs. In view of this, it is particularly important to develop a miniaturized, high-light, high-resolution vehicle-mounted side-view lens. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a miniaturized, high-light-through, and high-resolution vehicle-mounted side-view lens, which has the performance of miniaturization, high light-through, and high resolution.

[0004] To achieve the above object, the present invention provides the following technical solution: a miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens, which comprises, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture C, a fourth lens L4, a fifth lens L5 and a sixth lens L6,

[0005] The first lens L1 is a meniscus negative lens or a double concave negative lens with its concave surface facing the object;

[0006] The second lens L2 is a negative meniscus lens with a concave surface facing the object;

[0007] The third lens L3 is a biconvex positive lens;

[0008] The fourth lens L4 is a meniscus negative lens or a double concave negative lens with a concave surface facing the object;

[0009] The fifth lens L5 and the sixth lens L6 are both biconvex positive lenses;

[0010] The fourth lens L4 and the fifth lens L5 are closely connected to form a cemented group;

[0011] The aperture size of the first lens L1 is D1, the aperture value of the vehicle-mounted side-view lens is FNO, the entrance pupil diameter of the vehicle-mounted side-view lens is EPD, and the maximum field of view angle of the vehicle-mounted side-view lens is FOV, satisfying the relationship: D1 / (FNO×EPD×tan(FOV / 2))≤65.

[0012] As a specific implementation, the effective focal length of the vehicle-mounted side view lens is f, the effective focal length of the first lens L1 is f1, the effective focal length of the third lens L3 is f3, and f1, f3 and f satisfy the following conditions: -2.4≤f1 / f≤-2.2, 2.4≤f3 / f≤3.

[0013] As a specific implementation, the axial distance between the center of the image side surface of the first lens L1 and the center of the object side surface of the second lens L2 is d 12 , the total optical length of the vehicle-mounted side view lens is TTL, d 12 The following conditions are met with TTL: 0.06≤d 12 / TTL≤0.09.

[0014] As a specific implementation, the third lens L3 also satisfies the following condition: -0.94≤R 32 / (R 31 -R 32 )≤-0.74, where R 31 The radius of curvature of the object side of the third lens L3, R 32 It represents the curvature radius of the image side of the third lens L3.

[0015] As a specific implementation, the effective focal length of the vehicle-mounted side-view lens is f, the total optical length of the vehicle-mounted side-view lens is TTL, and f and TTL satisfy the following condition: 0.12≤f / TTL≤0.13.

[0016] As a specific implementation, the refractive index N of the fourth lens L4 is d4 Satisfy N d4 ≥1.9.

[0017] As a specific implementation, when the first lens L1, the second lens L2 and the fourth lens L4 are all meniscus negative lenses with the concave surface facing the object side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.6444 mm; the air distance from the second lens L2 to the third lens L3 is 0.4346 mm; the air distance from the third lens L3 to the aperture C is 0.3410 mm; the air distance from the aperture C to the fourth lens L4 is 0.0221 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0565 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.5145 mm.

[0018] As a specific implementation, when the first lens L1 is a double concave negative lens, the second lens L2 and the fourth lens L4 are both meniscus negative lenses with concave surfaces facing the object side, and the third lens L3, the fifth lens L5, and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.4839 mm; the air distance from the second lens L2 to the third lens L3 is 0.4575 mm; the air distance from the third lens L3 to the aperture C is 0.5711 mm; the air distance from the aperture C to the fourth lens L4 is 0.0182 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0237 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.1728 mm.

[0019] As a specific implementation, when the first lens L1 and the fourth lens L4 are both double concave negative lenses, the second lens L2 is a meniscus negative lens with a concave surface facing the object side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.3914 mm; the air distance from the second lens L2 to the third lens L3 is 0.5970 mm; the air distance from the third lens L3 to the aperture C is 0.1861 mm; the air distance from the aperture C to the fourth lens L4 is 0.0865 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0232 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.2550 mm.

[0020] Compared with the prior art, the present invention provides a miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens, which has the following beneficial effects:

[0021] 1) The present invention optimizes the optical performance and miniaturizes the lens by rationally planning the layout of each lens in the optical system;

[0022] 2) The present invention can effectively improve the chromatic aberration of the optical system, reduce the sensitivity of the system, and reduce the cost by gluing the fourth lens L4 and the fifth lens L5 together;

[0023] 3) The present invention reasonably controls the focal length of the third lens L3 so that TTL is ≤ 20.37 mm to meet the demand for miniaturization and reasonably adjusts the curvature of the third lens L3 to adjust the shape of the lens to achieve the demand for high resolution;

[0024] 4) By reasonably adjusting the ratio of the on-axis distance between the center of the image side of the first lens L1 and the center of the object side of the second lens L2 to the total length of the lens, the demand for large light transmission can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the optical path diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 1;

[0026] Figure 2 The MTF curve of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in the visible light band in Example 1;

[0027] Figure 3 This is a relative illumination curve diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 1;

[0028] Figure 4 The axial aberration curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 1;

[0029] Figure 5 A vertical axis chromatic aberration curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 1;

[0030] Figure 6 This is the optical path diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 2;

[0031] Figure 7 This is an MTF curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 2;

[0032] Figure 8 This is a relative illumination curve diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 2;

[0033] Fig. 9 The axial aberration curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 2;

[0034] Fig.10 A vertical axis chromatic aberration curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 2;

[0035] Fig.11 This is the optical path diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 3;

[0036] Fig.12 This is an MTF curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 3;

[0037] Fig.13 This is a relative illumination curve diagram of the miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens in Example 3;

[0038] Fig.14The axial aberration curve diagram of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 3;

[0039] Fig.15 This is a vertical axis chromatic aberration curve of the visible light band of the miniaturized, high-light transmission and high-resolution vehicle-mounted side-view lens in Example 3. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The present invention provides a miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens, which comprises, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture C, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0042] Among them, the first lens L1 is a meniscus negative lens or a double concave negative lens with its concave surface facing the object; the second lens L2 is a meniscus negative lens with its concave surface facing the object; the third lens L3 is a double convex positive lens; the fourth lens L4 is a meniscus negative lens or a double concave negative lens with its concave surface facing the object; the fifth lens L5 and the sixth lens L6 are both double convex positive lenses; the fourth lens L4 and the fifth lens L5 are in close contact to form a cemented group.

[0043] Here, the first lens L1 is configured as a curved shape of a meniscus negative lens or a double concave negative lens with the concave surface facing the object, which is beneficial for the lens to obtain light at a large angle.

[0044] The second lens L2 can diverge the light collected by the first lens L1, so that the light can smoothly transition to the rear optical system, and the optical focal length can be reasonably controlled.

[0045] The third lens L3 can focus the light collected by the second lens L2 so that the light is more evenly irradiated to the target area and the aberration is corrected, thereby optimizing the imaging performance of the lens group.

[0046] The aperture C is placed between the third lens L3 and the fourth lens L4 to control the imaging quality and the performance of the optical system by limiting the range and direction of light passing through.

[0047] The fourth lens L4 and the fifth lens L5 are closely connected to form a cemented part to eliminate or balance the chromatic aberration and distortion produced by the lens and reduce the tolerance sensitivity. At the same time, here, the fourth lens L4 and the fifth lens L5 are both glass lenses, which can effectively improve the stability and durability of the lens group. The remaining lenses also use glass lenses with conventional refractive index.

[0048] The sixth lens L6 can focus the light collected by the fifth lens L5, which is beneficial to the field correction of the lens and optimizes the imaging performance of the lens group. Example 1

[0049] In the optical system of this example, the first lens L1, the second lens L2 and the fourth lens L4 are all meniscus negative lenses with the concave surface facing the object side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses. Figure 1 shown.

[0050] See Table 1, 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:

[0051] Table 1

[0052]

[0053] Infinity means infinity.

[0054] In this example, the air distance from the first lens L1 to the second lens L2 is 1.6444 mm; the air distance from the second lens L2 to the third lens L3 is 0.4346 mm; the air distance from the third lens L3 to the aperture C is 0.3410 mm; the air distance from the aperture C to the fourth lens L4 is 0.0221 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0565 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.5145 mm.

[0055] The technical indicators achieved by the optical system in this example are as follows:

[0056] 1) The aperture size of the first lens L1: D1 = 9.5220 mm;

[0057] 2) The aperture value of the vehicle side view lens: FNO = 1.8218;

[0058] 3) Entrance pupil diameter of the vehicle-mounted side-view lens: EPD = 1.4413 mm;

[0059] 4) Maximum field of view of the vehicle-mounted side-view camera: FOV = 119.5°;

[0060] 5) The effective focal length of the first lens L1: f1 = -5.7680 mm;

[0061] 6) The effective focal length of the third lens L3: f3 = 7.4126 mm;

[0062] 7) The effective focal length of the vehicle-mounted side-view lens is f = 2.5223 mm;

[0063] 8) The axial distance between the center of the image side surface of the first lens L1 and the center of the object side surface of the second lens L2: d 12 =1.6444mm;

[0064] 9) The total optical length of the vehicle-mounted side view lens: TTL = 20.1806 mm;

[0065] 10) The radius of curvature of the object side of the third lens L3: R 31 =6.6780 mm;

[0066] 11) The radius of curvature of the image side of the third lens L3: R 32 =-96.3910 mm;

[0067] 12) Refractive index of the fourth lens L4: N d4 =1.92.

[0068] Then we can get: D1 / (FNO×EPD×tan(FOV / 2))=60.6313; f1 / f=-2.2868; f3 / f=2.9389; d 12 / TTL=0.0815; R 32 / (R 31 -R 32 )=-0.9352; f / TTL=0.1250.

[0069] Here, by closely contacting the fourth lens L4 and the fifth lens L5 to form a cemented lens, the chromatic aberration of the optical system can be effectively improved, the sensitivity of the system can be reduced, and the cost can be reduced.

[0070] The optical power of the third lens L3 is reasonably controlled to make TTL ≤ 20.37 mm to meet the miniaturization requirements.

[0071] By adjusting the aperture, the incident light is controlled, thereby widening the range of the target image surface.

[0072] Here, by reasonably setting the aperture D1 of the first lens, the aperture value FNO of the lens, the entrance pupil diameter EPD of the lens and the maximum field of view FOV, that is, requiring the four to satisfy D1 / (FNO×EPD×tan(FOV / 2))≤65, the demand for miniaturization is achieved.

[0073] By reasonably setting the ratio of the optical power of the first lens L1, the third lens L3 to the optical power of the entire lens, that is, -2.4≤f1 / f≤-2.2, 2.4≤f3 / f≤3, the requirement of clear imaging can be achieved.

[0074] By reasonably adjusting the ratio of the distance between the first lens L1 and the second lens L2 to the total length of the lens, that is, requiring 0.06≤d 12 / TTL≤0.09, thus meeting the demand for high-throughput light.

[0075] By properly adjusting the curvature of the third lens L3, that is, -0.94≤R 32 / (R 31 -R 32 )≤-0.74, and then adjust the shape of the lens to achieve high resolution requirements.

[0076] Here, the total focal length of the optical system is required to be f, the total optical length TTL of the optical system satisfies 0.12≤f / TTL≤0.13, and the refractive index N of the fourth lens L4 is required to be d4 Satisfy N d4 ≥1.9, thus meeting the demand for miniaturization.

[0077] The final imaging effect of the lens in this example is achieved through Figure 2 The MTF graph of the lens shows that the MTF curves in each field of view all drop gently and have good consistency. As can be seen from the graph, the MTF value of the edge field of view at a spatial frequency of 60pl / mm is greater than 0.7, which means that the lens has good imaging effect and resolution in the entire field of view. Figure 3 It can be seen from the relative illumination curve that under the maximum field of view, the relative illumination value of the lens is greater than 75%; Figure 4 : is the axial aberration diagram of the lens of this embodiment. It can be seen that the maximum axial aberration does not exceed 0.06mm, and the imaging quality is good; Figure 5 This is the vertical axis chromatic aberration curve. It can be seen that the vertical axis chromatic aberration is less than 2.8μm. Example 2

[0078] In this example, in the optical system, the first lens L1 is a double concave negative lens, the second lens L2 and the fourth lens L4 are both meniscus negative lenses with the concave surface facing the object side, and the third lens L3, the fifth lens L5, and the sixth lens L6 are all double convex positive lenses. The optical path diagram of the vehicle-mounted side view lens is shown in FIG. Figure 6 shown.

[0079] See Table 2, 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:

[0080] Table 2

[0081]

[0082] In this example, the air distance from the first lens L1 to the second lens L2 is 1.4839 mm; the air distance from the second lens L2 to the third lens L3 is 0.4575 mm; the air distance from the third lens L3 to the aperture C is 0.5711 mm; the air distance from the aperture C to the fourth lens L4 is 0.0182 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0237 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.1728 mm.

[0083] The technical indicators achieved by the optical system in this example are as follows:

[0084] 1) The aperture size of the first lens L1: D1 = 9.7294 mm;

[0085] 2) Aperture value of vehicle-mounted side view lens: FNO = 1.8326;

[0086] 3) Entrance pupil diameter of the vehicle-mounted side-view lens: EPD = 1.4414 mm;

[0087] 4) Maximum field of view of the vehicle-mounted side-view camera: FOV = 119.5°;

[0088] 5) The effective focal length of the first lens L1: f1 = -5.8536 mm;

[0089] 6) The effective focal length of the third lens L3 is f3 = 7.0843 mm;

[0090] 7) The effective focal length of the vehicle-mounted side-view lens is f = 2.5225 mm;

[0091] 8) The axial distance between the center of the image side surface of the first lens L1 and the center of the object side surface of the second lens L2: d 12 =1.4839mm;

[0092] 9) The total optical length of the vehicle-mounted side view lens: TTL = 20.06 mm;

[0093] 10) The radius of curvature of the object side of the third lens L3: R 31 =7.4135 mm;

[0094] 11) The radius of curvature of the image side of the third lens L3: R 32 =-26.5738 mm;

[0095] 12) Refractive index of the fourth lens L4: N d4 =1.92.

[0096] Then we can get: D1 / (FNO×EPD×tan(FOV / 2))=61.5797; f1 / f=-2.3205; f3 / f=2.8084; d 12 / TTL=0.0740; R 32 / (R 31 -R 32 )=-0.7819; f / TTL=0.1257.

[0097] The final imaging effect of the present invention is achieved by Figure 7 The MTF graph of the lens shows that the MTF curves in each field of view decrease smoothly and have good consistency, which means that the lens has good imaging effect and resolution in the full field of view.

[0098] The final imaging effect of the lens in this example is achieved through Figure 7-10 To evaluate, from Figure 7 It can be seen that the MTF value of the edge field of view is greater than 0.65 at the spatial frequency of 60pl / mm; Figure 8 It can be seen from the relative illumination curve in that under the maximum field of view, the relative illumination value of the lens is greater than 75%; Fig. 9 : This is the axial aberration diagram of the lens of this embodiment. It can be seen that the maximum axial aberration does not exceed 0.08mm, and the imaging quality is good; Fig.10 This is the vertical axis chromatic aberration curve. It can be seen that the vertical axis chromatic aberration is less than 3μm. Example 3

[0099] In this example, the first lens L1 and the fourth lens L4 are both double concave negative lenses, the second lens L2 is a meniscus negative lens with the concave surface facing the object, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses. Fig.11 shown.

[0100] See 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:

[0101] Table 3

[0102]

[0103] In this example, the air distance from the first lens L1 to the second lens L2 is 1.3914 mm; the air distance from the second lens L2 to the third lens L3 is 0.5970 mm; the air distance from the third lens L3 to the aperture C is 0.1861 mm; the air distance from the aperture C to the fourth lens L4 is 0.0865 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0232 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.2550 mm.

[0104] The technical indicators achieved by the optical system in this example are as follows:

[0105] 1) The aperture size of the first lens L1: D1 = 9.8537 mm;

[0106] 2) The aperture value of the vehicle side view lens: FNO = 1.8248;

[0107] 3) Entrance pupil diameter of the vehicle-mounted side-view lens: EPD = 1.4415 mm;

[0108] 4) Maximum field of view of the vehicle-mounted side-view camera: FOV = 119.5°;

[0109] 5) The effective focal length of the first lens L1: f1 = -5.5906 mm;

[0110] 6) The effective focal length of the third lens L3: f3 = 6.2363 mm;

[0111] 7) The effective focal length of the vehicle-mounted side view lens is f = 2.5227mm;

[0112] 8) The axial distance between the center of the image side surface of the first lens L1 and the center of the object side surface of the second lens L2: d 12 =1.3914mm;

[0113] 9) The total optical length of the vehicle-mounted side view lens: TTL = 20.0597mm;

[0114] 10) The radius of curvature of the object side of the third lens L3: R 31 =6.7768mm;

[0115] 11) The radius of curvature of the image side of the third lens L3: R 32 =-19.4263mm;

[0116] 12) Refractive index of the fourth lens L4: N d4 =1.92.

[0117] Then we can get: D1 / (FNO×EPD×tan(FOV / 2))=62.6296; f1 / f=-2.2162; f3 / f=2.4721; d 12 / TTL=0.0694;R 32 / (R 31 -R 32 )=-0.7414; f / TTL=0.1258.

[0118] The final imaging effect of the lens in this example is achieved through Figure 12-15 To evaluate, from Fig.12It can be seen that the MTF value of the edge field of view is greater than 0.65 at the spatial frequency of 60pl / mm; Fig.13 It can be seen from the relative illumination curve in that under the maximum field of view, the relative illumination value of the lens is greater than 75%; Fig.14 : This is the axial aberration diagram of the lens of this embodiment. It can be seen that the maximum axial aberration does not exceed 0.07mm, and the imaging quality is good; Fig.15 This is the vertical axis chromatic aberration curve. It can be seen that the vertical axis chromatic aberration is less than 3μm.

[0119] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens, characterized in that: The vehicle-mounted side view lens has a total of six lenses, which include, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture C, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The first lens L1 is a meniscus negative lens or a double concave negative lens with a concave surface facing the image side; The second lens L2 is a negative meniscus lens with a concave surface facing the image side; The third lens L3 is a biconvex positive lens; The fourth lens L4 is a meniscus negative lens or a double concave negative lens with a concave surface facing the image side; The fifth lens L5 and the sixth lens L6 are both biconvex positive lenses; The fourth lens L4 and the fifth lens L5 are closely connected to form a cemented group; The effective focal length of the vehicle-mounted side view lens is f, the effective focal length of the first lens L1 is f1, the effective focal length of the third lens L3 is f3, and f1, f3 and f satisfy the following conditions: -2.4≤f1 / f≤-2.2, 2.4≤f3 / f≤3; The axial distance between the center of the image side surface of the first lens L1 and the center of the object side surface of the second lens L2 is d 12 , the total optical length of the vehicle-mounted side view lens is TTL, d 12 The following conditions are met with TTL: 0.06≤d 12 / TTL≤0.09; The third lens L3 also satisfies the following condition: -0.94≤R 32 / (R 31 -R 32 )≤-0.74, where R 31 The radius of curvature of the object side of the third lens L3, R 32 It represents the curvature radius of the image side of the third lens L3.

2. The miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens according to claim 1, characterized in that: The effective focal length of the vehicle-mounted side-view lens is f, the total optical length of the vehicle-mounted side-view lens is TTL, and f and TTL satisfy the following condition: 0.12≤f / TTL≤0.

13.

3. The miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens according to claim 1, characterized in that: Refractive index N of fourth lens L4 d4 Satisfy N d4 ≥1.

9.

4. The miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens according to claim 1, characterized in that: When the first lens L1, the second lens L2 and the fourth lens L4 are all meniscus negative lenses with the concave surface facing the image side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.6444 mm; the air distance from the second lens L2 to the third lens L3 is 0.4346 mm; the air distance from the third lens L3 to the aperture C is 0.3410 mm; the air distance from the aperture C to the fourth lens L4 is 0.0221 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0565 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.5145 mm.

5. The miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens according to claim 1, characterized in that: When the first lens L1 is a double concave negative lens, the second lens L2 and the fourth lens L4 are both meniscus negative lenses with the concave surface facing the image side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.4839 mm; the air distance from the second lens L2 to the third lens L3 is 0.4575 mm; the air distance from the third lens L3 to the aperture C is 0.5711 mm; the air distance from the aperture C to the fourth lens L4 is 0.0182 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0237 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.1727 mm.

6. The miniaturized, high-light-throughput, high-resolution vehicle-mounted side-view lens according to claim 1, characterized in that: When the first lens L1 and the fourth lens L4 are both double concave negative lenses, the second lens L2 is a meniscus negative lens with the concave surface facing the image side, and the third lens L3, the fifth lens L5 and the sixth lens L6 are all double convex positive lenses, the air distance from the first lens L1 to the second lens L2 is 1.3914 mm; the air distance from the second lens L2 to the third lens L3 is 0.5970 mm; the air distance from the third lens L3 to the aperture C is 0.1861 mm; the air distance from the aperture C to the fourth lens L4 is 0.0865 mm; the air distance from the fifth lens L5 to the sixth lens L6 is 0.0232 mm; and the air distance from the sixth lens L6 to the image plane IMG is 5.2550 mm.

Images