Low-cost high-definition vehicle-mounted front-view lens and application thereof

Abstract

The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof, which are sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a parallel flat plate and an image plane IMA along an optical axis incident direction, wherein the first lens has positive focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power, the object side surface is a concave surface, and the image side surface is a concave surface or a convex surface; the third lens has positive focal power, the object side surface is a convex surface, and the image side surface is a concave surface or a convex surface; the sixth lens has positive focal power, the object side surface is a convex surface, and the image side surface is a convex surface; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all glass spherical lens; the problems of high cost and complex processing of using glass aspherical surfaces are solved, the low-cost high-definition vehicle-mounted front-view lens has the advantages of small optical field curvature, small distortion and clear imaging, and the production cost is also reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, in particular to a low-cost high-definition vehicle-mounted front-view lens and application thereof. BACKGROUND

[0002] In recent years, with the development of vehicle-mounted technology, the technical requirements for front-view camera devices, automatic cruise control devices, vehicle recorders and vehicle-mounted cameras are becoming higher and higher. Among them, the front-view vehicle-mounted lens is an important part of the advanced driver assistance system, and the driver can discover obstacles in front of the vehicle through the front-view vehicle-mounted lens to avoid driving accidents. The application prospect of high-definition front-view camera lens is broad, but the traditional high-definition front-view camera lens has the following technical problems:

[0003] 1) The traditional high-definition front-view camera lens generally uses 1-3 pieces of aspherical molding glass lenses to improve the resolving power, which has high cost and complex processing, is not easy to process and manufacture, and has the technical problems of large optical field curvature, large distortion, unclear imaging and the like;

[0004] 2) The traditional high-definition front-view camera lens is not conducive to smoothly receiving the folded light, has large aberration, large lens sensitivity, and is not conducive to reducing the lens aperture;

[0005] 3) The traditional high-definition front-view camera lens has large chromatic aberration, resulting in poor imaging quality, and has poor transmittance, making assembly difficult. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a low-cost high-definition vehicle-mounted front-view lens and application thereof, which solves the problems of high cost and complex processing of using glass aspherical surfaces. The low-cost high-definition vehicle-mounted front-view lens has the advantages of small optical field curvature, small distortion and clear imaging, and also reduces the production cost.

[0007] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0008] A low-cost high-definition vehicle-mounted front-view lens is provided, which is sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a parallel flat plate and an image plane IMA along the optical axis incident direction, wherein,

[0009] The first lens has positive focal power, the object side surface is convex, and the image side surface is concave;

[0010] The second lens has negative focal power, the object side surface is concave, and the image side surface is concave or convex;

[0011] The third lens has positive focal power, the object side surface is convex, and the image side surface is concave or convex.

[0012] The fourth lens has positive focal power, the object side surface is convex or concave, and the image side surface is concave or convex.

[0013] The fifth lens has negative focal power, the object side surface is convex or concave, and the image side surface is concave or convex.

[0014] The sixth lens has positive focal power, the object side surface is convex, and the image side surface is convex.

[0015] The seventh lens has positive focal power, the object side surface is convex or concave, and the image side surface is concave or convex.

[0016] The eighth lens has negative focal power, the object side surface is concave or convex, and the image side surface is concave.

[0017] The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all glass spherical lenses.

[0018] The application provides a low-cost high-definition vehicle front-view lens and an application thereof, solves the problems of high cost and complex processing of using a glass aspherical surface, and has the advantages of small optical field curvature, small distortion, clear imaging and the like, and also reduces production cost.

[0019] As a preferred technical solution, at least one set of cemented lenses is arranged in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens.

[0020] As a preferred technical solution, the first lens satisfies Nd1>1.79 and Vd1>35, wherein Nd1 represents the refractive index of the first lens, and Vd1 represents the Abbe number of the first lens; the second lens satisfies Nd2>1.72 and Vd2<29, wherein Nd2 represents the refractive index of the second lens, and Vd2 represents the Abbe number of the second lens; the third lens satisfies Nd3>1.74 and Vd3<53, wherein Nd3 represents the refractive index of the third lens, and Vd3 represents the Abbe number of the third lens; the fifth lens satisfies Nd5<1.76 and Vd5<53, wherein Nd5 represents the refractive index of the fifth lens, and Vd5 represents the Abbe number of the fifth lens; and the seventh lens satisfies Nd7>1.8 and Vd7<47, wherein Nd7 represents the refractive index of the seventh lens, and Vd7 represents the Abbe number of the seventh lens.

[0021] As a preferred technical solution, the high-definition vehicle front-view lens satisfies the following conditions:

[0022] BFL / TTL≥0.1,

[0023] Wherein, BFL is the distance from the eighth lens image side face center of the high-definition vehicle-mounted front-view lens to the imaging plane of the optical lens on the optical axis; and TTL is the distance from the object side face center of the first lens to the imaging plane of the optical lens on the optical axis.

[0024] As a preferred technical solution, the high-definition vehicle-mounted front-view lens satisfies the following conditions:

[0025] 0.32≤FOV / h / D≤0.38,

[0026] Wherein, FOV is the maximum field of view angle of the optical lens;

[0027] D is the maximum light aperture of the object side face of the first lens corresponding to the maximum field of view angle of the optical lens; and

[0028] h is the image height corresponding to the maximum field of view angle of the optical lens.

[0029] As a preferred technical solution, the high-definition vehicle-mounted front-view lens satisfies the following conditions between the maximum field of view angle FOV, the total focal length f of the optical lens and the image height h corresponding to the maximum field of view angle of the optical lens:

[0030] 56≤(FOV×f) / h≤58.

[0031] As a preferred technical solution, the high-definition vehicle-mounted front-view lens satisfies the following condition formula:

[0032] TTL / f≤2.2,

[0033] Wherein, TTL is the distance from the object side face center of the first lens to the imaging plane of the optical lens on the optical axis, and f is the total lens focal length.

[0034] As a preferred technical solution, the high-definition vehicle-mounted front-view lens satisfies the following condition formula: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, wherein f1, f2, f3 and f6 are the focal lengths of the first lens, the second lens, the third lens and the sixth lens in sequence, and f is the total lens focal length.

[0035] As a preferred technical solution, the first lens and the second lens are provided with a diaphragm.

[0036] The application also provides a low-cost high-definition vehicle-mounted front-view lens for application in automatic driving as a front-view system of a vehicle.

[0037] The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof.

[0038] 1) The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof, solves the problems of high cost and complex processing of using glass aspherical surfaces, and has the advantages of small optical field curvature, small distortion and clear imaging, and also reduces production cost.

[0039] 2) The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof, the first lens has positive optical power, the object side is a convex surface, the image side is a concave surface, the first lens is a crescent shape, is conducive to collecting light and reducing distortion; the diaphragm is arranged between the first lens and the second lens, which is conducive to reducing the lens aperture; the second lens has negative optical power, which is conducive to smoothly accepting the turning light, reducing aberration and reducing lens sensitivity, and also conducive to reducing the lens aperture; the third lens and the sixth lens both have positive optical power, which is conducive to turning the light and reducing the lens length.

[0040] 3) The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof, at least one group of glued lenses in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens, at least one group of glued lenses can reduce or eliminate chromatic aberration, improve imaging quality, glued lenses improve lens transmittance, and reduce assembly difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The structure combination diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 1 (the object side is at the leftmost position, and the image side is at the rightmost position);

[0042] Figure 2 The field curvature distortion diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 1;

[0043] Figure 3 The structure combination diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 2 (the object side is at the leftmost position, and the image side is at the rightmost position);

[0044] Figure 4 The field curvature distortion diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 2;

[0045] Figure 5 The structure combination diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 3 (the object side is at the leftmost position, and the image side is at the rightmost position);

[0046] Figure 6 The field curvature distortion diagram of the low-cost high-definition vehicle-mounted front-view lens provided for example 3;

[0047] Figure 7 Structure combination diagram of low-cost high-definition vehicle-mounted front-view lens provided for embodiment 4 (object side at the leftmost position, image side at the rightmost position) ;

[0048] Figure 8 Field curvature distortion diagram of low-cost high-definition vehicle-mounted front-view lens provided for embodiment 4;

[0049] Figure 9 Structure combination diagram of low-cost high-definition vehicle-mounted front-view lens provided for embodiment 5 (object side at the leftmost position, image side at the rightmost position) ;

[0050] Figure 10 Field curvature distortion diagram of low-cost high-definition vehicle-mounted front-view lens provided for embodiment 5;

[0051] Wherein, 1-first lens; 2-second lens; 3-third lens; 4-fourth lens; 5-fifth lens; 6-sixth lens; 7-seventh lens; 8-eighth lens; 9-diaphragm; 10-parallel plate; 11-image plane I MA. DETAILED DESCRIPTION

[0052] It should be noted that the use of the words "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" to define components is only for the convenience of distinguishing the corresponding components, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0053] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0054] It can be understood that the present application achieves the purpose of the present application through some embodiments.

[0055] Embodiment 1

[0056] As shown in Figure 1 The present application provides a low-cost high-definition vehicle-mounted front-view lens, which is provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a parallel plate 10 and an image plane I MA 11 in sequence along the incident direction of the optical axis, wherein,

[0057] The first lens 1 has positive focal power, the object side surface is convex, and the image side surface is concave;

[0058] The second lens 2 has negative focal power, the object side surface is concave, and the image side surface is concave;

[0059] The third lens 3 has positive focal power, the object side surface is convex, and the image side surface is concave;

[0060] The fourth lens 4 has positive focal power, the object side surface is concave, and the image side surface is convex;

[0061] The fifth lens 5 has negative focal power, the object side surface is convex, and the image side surface is concave;

[0062] The sixth lens 6 has positive focal power, the object side surface is convex, and the image side surface is convex;

[0063] The seventh lens 7 has positive focal power, the object side surface is convex, and the image side surface is concave;

[0064] The eighth lens 8 has negative focal power, the object side surface is concave, and the image side surface is concave;

[0065] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, and the eighth lens 8 are all glass spherical lenses; the second lens 2 and the third lens 3 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens; the first lens 1 has positive focal power, the object side surface is convex, and the image side surface is concave, the first lens 1 is meniscus-shaped, which is conducive to collecting light and reducing distortion; the diaphragm 9 is arranged between the first lens 1 and the second lens 2, which is conducive to reducing the lens aperture; the second lens 2 has negative focal power, which is conducive to smoothly accepting the turned light, reducing aberration, reducing lens sensitivity, and also reducing the lens aperture; the third lens 3 and the sixth lens 6 both have positive focal power, which is conducive to turning light and reducing lens length; the second lens 2 and the third lens 3 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens, at least one group of cemented lenses can reduce or eliminate chromatic aberration, improve imaging quality, cemented lenses improve lens transmittance, and reduce assembly difficulty; the optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 1 are shown in Table 1.

[0066] Table 1 Optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 1

[0067]

[0068]

[0069] From Table 1, we can observe that the first lens 1 Nd1 is 1.880, the first lens 1 Vd1 is 40.900, the first lens 1 Nd1>1.79, and Vd1>35, wherein Nd1 refers to the refractive index of the first lens 1, and Vd1 refers to the Abbe number of the first lens;

[0070] The second lens 2Nd2 is 1.760, the second lens 2Vd2 is 27.500, the second lens 2Nd2 > 1.72, Vd2 < 29, wherein Nd2 refers to the refractive index of the second lens 2, and Vd2 refers to the Abbe number of the second lens 2;

[0071] The third lens 3Nd3 is 1.920, the third lens 3Vd3 is 20.900, the third lens 3Nd3 > 1.74, Vd3 < 53, wherein Nd3 refers to the refractive index of the third lens 3, and Vd3 refers to the Abbe number of the third lens 3;

[0072] The fifth lens 5Nd5 is 1.580, the fifth lens 5Vd5 is 41.500, the fifth lens 5Nd5 < 1.76, Vd5 < 53, wherein Nd5 refers to the refractive index of the fifth lens 5, and Vd5 refers to the Abbe number of the fifth lens 5;

[0073] The seventh lens 7Nd7 is 1.800, the seventh lens 7Vd7 is 46.600, the seventh lens 7Nd7 > 1.8, Vd7 < 47, wherein Nd7 refers to the refractive index of the seventh lens 7, and Vd7 refers to the Abbe number of the seventh lens;

[0074] The specification summary table of the low-cost high-definition vehicle front-view lens provided in Example 1 is shown in Table 2;

[0075] Table 2 Specification summary of the low-cost high-definition vehicle front-view lens provided in Example 1

[0076] f BFL TTL FOV h D Example 1 15.39 4.1 32.23 34.4 9.252 10.24

[0077] From Table 2, we can observe that BFL / TTL = 0.127, which satisfies the condition: BFL / TTL > 0.1, wherein BFL is the distance from the center of the image side surface of the eighth lens of the high-definition vehicle front-view lens to the imaging surface of the optical lens on the optical axis; and TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the optical lens on the optical axis;

[0078] Further, BFL / TTL > 0.12, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module;

[0079] From Table 2, we can observe that FOV / h / D = 0.363, satisfies the following condition: 0.32≤FOV / h / D≤0.38, wherein FOV is the maximum field of view angle of the optical lens; D is the maximum light aperture of the first lens 1 side corresponding to the maximum field of view angle of the optical lens; and h is the image height corresponding to the maximum field of view angle of the optical lens; when the high-definition vehicle-mounted front-view lens satisfies the following condition: 0.32≤FOV / h / D≤0.38, it is beneficial to realize small aperture for the front-end lens.

[0080] From Table 2, we can observe that (FOV x f) / h = 57.222, satisfies the following condition: 56≤(FOV x f) / h≤58. 其中， FOV is the maximum field of view angle of the high-definition vehicle-mounted front-view lens, f is the total focal length value of the optical lens, and h is the image height corresponding to the maximum field of view angle of the optical lens,

[0081] Controlling the three indexes of FOV, f and h, satisfies the following condition: 56≤(FOV x f) / h≤58, which is beneficial to reduce lens distortion.

[0082] From Table 2, we can observe that TTL / f = 2.094, and the high-definition vehicle-mounted front-view lens satisfies the condition: TTL / f≤2.2, wherein TTL is the distance from the center of the object side of the first lens 1 to the imaging plane of the optical lens on the optical axis, and f is the total lens focal length; it is beneficial to miniaturize the lens.

[0083] The high-definition vehicle-mounted front-view lens satisfies the condition: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, wherein f1, f2, f3 and f6 are the focal lengths of the first lens 1, the second lens 2, the third lens 3 and the sixth lens 6, respectively, and f is the total lens focal length; by reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity, control the high and low temperature back focus drift of the lens in a small range, and satisfy clear imaging.

[0084] The embodiment also provides a low-cost high-definition vehicle-mounted front-view lens for application in automatic driving as a vehicle front-view system.

[0085] As Figure 2As shown in the field curvature distortion figure of the low-cost high-definition vehicle front-view lens provided by the embodiment 1, the left figure is a field curvature curve figure, the vertical coordinate of the field curvature figure is the field angle, the horizontal coordinate is the distance of the image point deviating from the paraxial image plane, T represents the meridional field curvature, S represents the sagittal field curvature, the field curvature curve shows the distance of the current focal plane or image plane to the paraxial focal plane as the function of the field coordinate, which is divided into meridional field curvature and sagittal field curvature; the right figure is a distortion curve figure, the vertical coordinate of the distortion figure is the field angle, the horizontal coordinate is the distortion percentage, the distortion belongs to the chief ray aberration, and reflects the similarity degree of the object image, the optical lens in the specific embodiment has smaller optical field curvature and smaller distortion, and the image is clear.

[0086] Embodiment 2

[0087] As Figure 3 shown, the application provides a low-cost high-definition vehicle front-view lens, which is sequentially provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a parallel flat plate 10 and an image plane I MA11 along the incident direction of the optical axis, wherein,

[0088] The first lens 1 has positive refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0089] The second lens 2 has negative refractive power, the object side surface is a concave surface, and the image side surface is a concave surface;

[0090] The third lens 3 has positive refractive power, the object side surface is a convex surface, and the image side surface is a convex surface;

[0091] The fourth lens 4 has positive refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0092] The fifth lens 5 has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0093] The sixth lens 6 has positive refractive power, the object side surface is a convex surface, and the image side surface is a convex surface;

[0094] The seventh lens 7 has positive refractive power, the object side surface is a concave surface, and the image side surface is a convex surface;

[0095] The eighth lens 8 has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0096] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the eighth lens 8 are all glass spherical lenses; the second lens 2 and the third lens 3 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens; the first lens 1 has a positive focal power, the object side is a convex surface, and the image side is a concave surface, the first lens 1 is a meniscus shape, which is beneficial to collect light and reduce distortion; the diaphragm is arranged between the first lens 1 and the second lens 2, which is beneficial to reduce the lens aperture; the second lens 2 has a negative focal power, which is beneficial to smoothly accept the turning light, reduce aberration, reduce the sensitivity of the lens, and also reduce the lens aperture; the third lens 3 and the sixth lens 6 both have a positive focal power, which is beneficial to turn the light and reduce the length of the lens; the second lens 2 and the third lens 3 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens, at least one group of cemented lenses reduces or eliminates chromatic aberration, improves imaging quality, and the cemented lens improves the transmittance of the lens and reduces the assembly difficulty; the optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in Embodiment 2 are shown in Table 3.

[0097] Table 3 Optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in Embodiment 2

[0098]

[0099] From Table 3, we can observe that the first lens 1 Nd1 is 1.792, the first lens 1 Vd1 is 47.500, the first lens 1 Nd1>1.79, and Vd1>35, wherein Nd1 refers to the refractive index of the first lens 1, and Vd1 refers to the Abbe number of the first lens 1;

[0100] The second lens 2 Nd2 is 1.730, the second lens 2 Vd2 is 28.300, the second lens 2 Nd2>1.72, and Vd2<29, wherein Nd2 refers to the refractive index of the second lens 2, and Vd2 refers to the Abbe number of the second lens 2;

[0101] The third lens 3 Nd3 is 2.000, the third lens 3 Vd3 is 28.300, the third lens 3 Nd3>1.74, and Vd3<53, wherein Nd3 refers to the refractive index of the third lens 3, and Vd3 refers to the Abbe number of the third lens 3;

[0102] The fifth lens 5 Nd5 is 1.650, the fifth lens 5 Vd5 is 33.800, the fifth lens 5 Nd5<1.76, and Vd5<53, wherein Nd5 refers to the refractive index of the fifth lens 5, and Vd5 refers to the Abbe number of the fifth lens 5;

[0103] The seventh lens 7Nd7 is 1.810, the seventh lens 7Vd7 is 22.700, the seventh lens 7Nd7 is greater than or equal to 1.8, and Vd7 is less than 47, wherein Nd7 refers to the refractive index of the seventh lens 7, and Vd7 refers to the Abbe number of the seventh lens 7;

[0104] The specification summary table of the low-cost high-definition vehicle front-view lens provided in Embodiment 2 is shown in Table 4.

[0105] Table 4 Specification summary of the low-cost high-definition vehicle front-view lens provided in Embodiment 2

[0106] f BFL TTL FOV h D Example 2 15.38 3.2 30.51 34.4 9.252 10.2

[0107] From Table 4, we can observe that BFL / TTL = 0.105, which satisfies the condition BFL / TTL ≥ 0.1, wherein BFL is the distance from the center of the image side of the eighth lens of the high-definition vehicle front-view lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object side of the first lens 1 to the imaging surface of the optical lens on the optical axis, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module.

[0108] From Table 4, we can observe that FOV / h / D = 0.365, which satisfies the condition 0.32 ≤ FOV / h / D ≤ 0.38, wherein FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the object side of the first lens 1 corresponding to the maximum field of view of the optical lens, and h is the image height corresponding to the maximum field of view of the optical lens. When the high-definition vehicle front-view lens satisfies the condition 0.32 ≤ FOV / h / D ≤ 0.38, it is beneficial to realize a small aperture for the front lens.

[0109] From Table 4, we can observe that (FOV x f) / h = 57.185, which satisfies the condition formula 56 ≤ (FOV x f) / h ≤ 58, wherein FOV is the maximum field of view of the high-definition vehicle front-view lens, f is the total focal length of the optical lens, and h is the image height corresponding to the maximum field of view of the optical lens. By controlling the three indicators FOV, f, and h, when the condition formula 56 ≤ (FOV x f) / h ≤ 58 is satisfied, it is beneficial to reduce the distortion of the lens.

[0110] From Table 4, we can observe that TTL / f = 1.984, and the high-definition vehicle front-view lens satisfies the condition formula TTL / f ≤ 2.2, wherein TTL is the distance from the center of the object side of the first lens 1 to the imaging surface of the optical lens on the optical axis, and f is the total focal length of the lens. This is beneficial to the miniaturization of the lens.

[0111] The high-definition vehicle-mounted front-view lens satisfies the following conditions: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, where f1, f2, f3, and f6 are the focal lengths of the first lens 1, the second lens 2, the third lens 3, and the sixth lens 6, respectively, and f is the focal length of the entire lens group. By reasonably matching the focal lengths of the lenses, it is beneficial to reduce assembly sensitivity and control the back focus drift of the lens within a very small range at high and low temperatures, thus ensuring clear imaging.

[0112] This embodiment also provides a low-cost, high-definition vehicle-mounted front-view camera for use in autonomous driving as a vehicle front-view system.

[0113] like Figure 4 As shown in Example 2, the field curvature distortion diagram of the low-cost high-definition vehicle-mounted forward-looking lens is presented. The left figure is a field curvature curve diagram, where the vertical axis of the field curvature curve is the field angle, and the horizontal axis is the distance of the image point from the paraxial image plane. T represents meridional field curvature, and S represents sagittal field curvature. The field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane, which is used as a function of the field coordinates. It is divided into meridional field curvature and sagittal field curvature. The right figure is a distortion curve diagram, where the vertical axis of the distortion diagram is the field angle, and the horizontal axis is the distortion percentage. Distortion belongs to the principal ray aberration and reflects the similarity of the object. The optical lens in this specific embodiment has a small optical field curvature, small distortion, and clear image.

[0114] Example 3

[0115] like Figure 5 As shown, this invention provides a low-cost, high-definition automotive front-view lens, which includes, sequentially along the incident optical axis, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a parallel plate 10, and an image plane I MA11, wherein...

[0116] The first lens 1 has positive optical power, and its object side is convex and its image side is concave.

[0117] The second lens 2 has negative optical power, and its object side is concave while its image side is convex.

[0118] The third lens 3 has positive optical power, and its object side is convex, and its image side is convex.

[0119] The fourth lens 4 has positive optical power, and its object side is concave and its image side is convex.

[0120] The fifth lens 5 has negative optical power, and its object side is concave, and its image side is concave.

[0121] The sixth lens 6 has positive optical power, and its object side is convex, and its image side is convex.

[0122] The seventh lens 7 has positive refractive power, the object side surface is convex, and the image side surface is concave;

[0123] The eighth lens 8 has negative refractive power, the object side surface is concave, and the image side surface is concave;

[0124] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, and the eighth lens 8 are all glass spherical lenses; the third lens 3 and the fourth lens 4 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens; the first lens 1 has positive refractive power, the object side surface is convex, and the image side surface is concave, the first lens 1 is meniscus-shaped, which is beneficial to collect light and reduce distortion; the diaphragm is arranged between the first lens 1 and the second lens 2, which is beneficial to reduce the lens aperture; the second lens 2 has negative refractive power, which is beneficial to smoothly accept the turned light, reduce aberration, reduce the sensitivity of the lens, and also reduce the lens aperture; the third lens 3 and the sixth lens 6 both have positive refractive power, which is beneficial to turn the light and reduce the length of the lens; the third lens 3 and the fourth lens 4 form a cemented lens, and the fifth lens 5 and the sixth lens 6 form a cemented lens, at least one group of cemented lenses reduces or eliminates chromatic aberration, improves imaging quality, and improves the transmittance of the lens and reduces the assembly difficulty; the optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 3 are shown in table 5.

[0125] Table 5 Optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 3

[0126]

[0127]

[0128] From table 5, we can observe that the first lens 1 Nd1 is 1.791, the first lens 1 Vd1 is 54.900, the first lens Nd1 is greater than 1.79, and Vd1 is greater than 35, wherein Nd1 refers to the refractive index of the first lens 1, and Vd1 refers to the Abbe number of the first lens 1;

[0129] The second lens 2 Nd2 is 1.920, the second lens 2 Vd2 is 20.900, the second lens 2 Nd2 is greater than 1.72, and Vd2 is less than 29, wherein Nd2 refers to the refractive index of the second lens 2, and Vd2 refers to the Abbe number of the second lens 2;

[0130] The third lens 3Nd3 is 1.750, the third lens 3Vd3 is 52.300, the third lens 3Nd3>1.74, Vd3<53, wherein Nd3 refers to the refractive index of the third lens 3, and Vd3 refers to the Abbe number of the third lens 3;

[0131] The fifth lens Nd5 is 1.600, the fifth lens Vd5 is 39.200, the fifth lens Nd5<1.76, Vd5<53, wherein Nd5 refers to the refractive index of the fifth lens, and Vd5 refers to the Abbe number of the fifth lens;

[0132] The seventh lens Nd7 is 1.820, the seventh lens Vd7 is 46.600, the seventh lens Nd7>1.8, Vd7<47, wherein Nd7 refers to the refractive index of the seventh lens, and Vd7 refers to the Abbe number of the seventh lens;

[0133] The specification summary table of the low-cost high-definition vehicle front-view lens provided in Embodiment 3 is shown in Table 6;

[0134] Table 6 Specification summary of the low-cost high-definition vehicle front-view lens provided in Embodiment 3

[0135] f BFL TTL FOV h D Example 3 15.44 3.27 32.5 34.4 9.252 11

[0136] From Table 6, we can observe that BFL / TTL=0.101, which satisfies the condition: BFL / TTL>0.1, wherein BFL is the distance from the image side center of the eighth lens 8 of the high-definition vehicle front-view lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the optical lens on the optical axis, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module;

[0137] From Table 6, we can observe that FOV / h / D=0.338, which satisfies the condition: 0.32FOV / h / D<0.38, wherein FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the object side surface of the first lens 1 corresponding to the maximum field of view of the optical lens, and h is the image height corresponding to the maximum field of view of the optical lens; when the high-definition vehicle front-view lens satisfies the condition: 0.32FOV / h / D<0.38, it is beneficial to realize a small aperture for the front lens;

[0138] From Table 6, we can observe that (FOVxf) / h = 57.408, which satisfies the following condition: 56≤(FOVxf) / h≤58; wherein FOV is the maximum field of view angle of the high-definition vehicle-mounted front-view lens, f is the overall focal length value of the optical lens, and h is the image height corresponding to the maximum field of view angle of the optical lens; by controlling the three indexes FOV, f and h, when 56≤(FOVxf) / h≤58 is satisfied, it is beneficial to reduce the lens distortion;

[0139] From Table 6, we can observe that TTL / f = 2.105, and the high-definition vehicle-mounted front-view lens satisfies the condition: TTL / f≤2.2, wherein TTL is the distance from the object side center of the first lens 1 to the imaging plane of the optical lens on the optical axis, and f is the overall lens focal length; which is beneficial to the miniaturization of the lens.

[0140] The high-definition vehicle-mounted front-view lens satisfies the condition: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, wherein f1, f2, f3 and f6 are the focal lengths of the first lens 1, the second lens 2, the third lens 3 and the sixth lens 6, respectively, and f is the overall lens focal length; by reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity and control the high and low temperature back focus drift of the lens within a small range, thereby satisfying clear imaging.

[0141] The embodiment also provides a low-cost high-definition vehicle-mounted front-view lens for application in automatic driving as a vehicle front-view system.

[0142] As shown in Figure 6 , the field curvature distortion graph of the low-cost high-definition vehicle-mounted front-view lens provided in Embodiment 3 is shown, wherein the left graph is a field curvature curve graph, the vertical coordinate of the field curvature graph is the field of view angle, the horizontal coordinate is the distance of the image point deviating from the near-axial image plane, T represents the meridional field curvature, and S represents the sagittal field curvature; the field curvature curve shows the distance of the current focal plane or image plane to the near-axial focal plane as a function of the field of view coordinate, which is divided into meridional field curvature and sagittal field curvature; the right graph is a distortion curve graph, the vertical coordinate of the distortion graph is the field of view angle, and the horizontal coordinate is the distortion percentage; distortion belongs to principal ray aberration, which reflects the similarity of the object and image; in this specific embodiment, the optical field curvature of the optical lens is small, the distortion is small, and the image is clear.

[0143] Embodiment 4

[0144] As shown in Figure 7 , the present application provides a low-cost high-definition vehicle-mounted front-view lens, which is sequentially provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a parallel flat plate 10 and an image plane I MA11 along the optical axis incident direction, wherein,

[0145] The first lens 1 has positive focal power, the object side surface is convex, and the image side surface is concave;

[0146] The second lens 2 has negative focal power, the object side surface is concave, and the image side surface is convex;

[0147] The third lens 3 has positive focal power, the object side surface is convex, and the image side surface is convex;

[0148] The fourth lens 4 has positive focal power, the object side surface is concave, and the image side surface is concave;

[0149] The fifth lens 5 has negative focal power, the object side surface is convex, and the image side surface is convex;

[0150] The sixth lens 6 has positive focal power, the object side surface is convex, and the image side surface is convex;

[0151] The seventh lens 7 has positive focal power, the object side surface is concave, and the image side surface is convex;

[0152] The eighth lens 8 has negative focal power, the object side surface is concave, and the image side surface is concave;

[0153] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the eighth lens 8 are all glass spherical lenses; the third lens 3 and the fourth lens 4 form a cemented lens, and the sixth lens 6 and the seventh lens 7 form a cemented lens; the first lens 1 has positive focal power, the object side surface is convex, and the image side surface is concave, the first lens 1 is crescent-shaped, which is conducive to collecting light and reducing distortion; the diaphragm 9 is arranged between the first lens 1 and the second lens 2, which is conducive to reducing the lens aperture; the second lens 2 has negative focal power, which is conducive to smoothly accepting the turned light, reducing aberration, reducing lens sensitivity, and also reducing the lens aperture; the third lens 3 and the sixth lens 6 both have positive focal power, which is conducive to turning light and reducing lens length; the third lens 3 and the fourth lens 4 form a cemented lens, and the sixth lens 6 and the seventh lens 7 form a cemented lens, at least one group of cemented lenses reduces or eliminates chromatic aberration, improves imaging quality, the cemented lens improves lens transmittance, and reduces assembly difficulty; the optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 4 are shown in table 7.

[0154] Table 7 Optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 4

[0155]

[0156]

[0157] From Table 7, we can observe that the first lens 1 Nd1 is 1.800, the first lens 1 Vd1 is 42.300, the first lens 1 Nd1 > 1.79, Vd1 > 35, wherein Nd1 refers to the refractive index of the first lens 1, and Vd1 refers to the Abbe number of the first lens 1;

[0158] The second lens 2 Nd2 is 1.810, the second lens 2 Vd2 is 22.700, the second lens 2 Nd2 > 1.72, Vd2 < 29, wherein Nd2 refers to the refractive index of the second lens 2, and Vd2 refers to the Abbe number of the second lens 2;

[0159] The third lens 3 Nd3 is 2.000, the third lens 3 Vd3 is 28.300, the third lens 3 Nd3 > 1.74, Vd3 < 53, wherein Nd3 refers to the refractive index of the third lens 3, and Vd3 refers to the Abbe number of the third lens 3;

[0160] The fifth lens 5 Nd5 is 1.750, the fifth lens 5 Vd5 is 52.300, the fifth lens 5 Nd5 < 1.76, Vd5 < 53, wherein Nd5 refers to the refractive index of the fifth lens 5, and Vd5 refers to the Abbe number of the fifth lens 5;

[0161] The seventh lens 7 Nd7 is 2.000, the seventh lens 7 Vd7 is 25.400, the seventh lens 7 Nd7 > 1.8, Vd7 < 47, wherein Nd7 refers to the refractive index of the seventh lens 7, and Vd7 refers to the Abbe number of the seventh lens 7;

[0162] The specification summary table of the low-cost high-definition vehicle front-view lens provided in Example 4 is shown in Table 8;

[0163] Table 8 Specification summary of the low-cost high-definition vehicle front-view lens provided in Example 4

[0164] f BFL TTL FOV h D Example 4 15.33 3.9 32.5 34.4 9.252 10.1

[0165] From Table 8, we can observe that BFL / TTL = 0.12, which satisfies the condition: BFL / TTL > 0.1, wherein BFL is the distance from the image side center of the eighth lens 8 of the high-definition vehicle front-view lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the optical lens on the optical axis, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module;

[0166] From Table 8, we can observe that FOV / h / D = 0.368, satisfies the following condition: 0.32≤FOV / h / D≤0.38, wherein FOV is the maximum field of view angle of the optical lens; D is the maximum light aperture of the object side of the first lens 1 corresponding to the maximum field of view angle of the optical lens; and h is the image height corresponding to the maximum field of view angle of the optical lens; when the high-definition vehicle-mounted front-view lens satisfies the following condition: 0.32≤FOV / h / D≤0.38, it is beneficial to realize small aperture for the front-end lens.

[0167] From Table 8, we can observe that (FOV x f) / h = 56.999, satisfies the following condition: 56≤(FOV x f) / h≤58; wherein FOV is the maximum field of view angle of the high-definition vehicle-mounted front-view lens, f is the total focal length of the optical lens, and h is the image height corresponding to the maximum field of view angle of the optical lens; controlling the three indexes of FOV, f and h, satisfies the following condition: 56≤(FOV x f) / h≤58, which is beneficial to reduce the lens distortion.

[0168] From Table 8, we can observe that TTL / f = 2.120, and the high-definition vehicle-mounted front-view lens satisfies the condition: TTL / f≤2.2, wherein TTL is the distance from the center of the object side of the first lens 1 to the imaging plane of the optical lens on the optical axis, and f is the total focal length of the lens; which is beneficial to the miniaturization of the lens.

[0169] The high-definition vehicle-mounted front-view lens satisfies the condition: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, wherein f1, f2, f3 and f6 are the focal lengths of the first lens 1, the second lens 2, the third lens 3 and the sixth lens 6, respectively, and f is the total focal length of the lens; by reasonably matching the focal lengths of the lenses, it is beneficial to reduce the assembly sensitivity, control the high and low temperature back focus drift of the lens in a small range, and satisfy clear imaging.

[0170] The embodiment also provides a low-cost high-definition vehicle-mounted front-view lens as a vehicle front-view system for application in automatic driving.

[0171] As Figure 8As shown in the figure, the low-cost high-definition vehicle front-view lens provided by the embodiment 4 provides a field curvature distortion figure, wherein the left figure is a field curvature curve figure, the vertical coordinate of the field curvature figure is the field angle, the horizontal coordinate is the distance of the image point deviating from the paraxial image plane, T represents the meridional field curvature, S represents the sagittal field curvature, the field curvature curve shows the distance of the current focal plane or image plane to the paraxial focal plane as the function of the field coordinate, which is divided into meridional field curvature and sagittal field curvature; the right figure is a distortion curve figure, the vertical coordinate of the distortion figure is the field angle, the horizontal coordinate is the distortion percentage, the distortion belongs to the chief ray aberration, and reflects the similarity degree of the object image. The optical lens in the specific embodiment has smaller optical field curvature and smaller distortion, and the image is clear.

[0172] Embodiment 5

[0173] As Figure 9 shown, the present application provides a low-cost high-definition vehicle front-view lens, which is sequentially provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a parallel flat plate 10 and an image plane I MA11 along the incident direction of the optical axis, wherein,

[0174] The first lens 1 has positive refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0175] The second lens 2 has negative refractive power, the object side surface is a concave surface, and the image side surface is a convex surface;

[0176] The third lens 3 has positive refractive power, the object side surface is a convex surface, and the image side surface is a convex surface;

[0177] The fourth lens 4 has positive refractive power, the object side surface is a convex surface, and the image side surface is a convex surface;

[0178] The fifth lens 5 has negative refractive power, the object side surface is a concave surface, and the image side surface is a concave surface;

[0179] The sixth lens 6 has positive refractive power, the object side surface is a convex surface, and the image side surface is a convex surface;

[0180] The seventh lens 7 has positive refractive power, the object side surface is a convex surface, and the image side surface is a concave surface;

[0181] The eighth lens 8 has negative refractive power, the object side surface is a concave surface, and the image side surface is a concave surface;

[0182] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the eighth lens 8 are all glass spherical lenses; the fourth lens 4, the fifth lens 5 and the sixth lens 6 form a cemented lens; the first lens 1 has a positive focal power, the object side is a convex surface, the image side is a concave surface, the first lens 1 is a meniscus shape, which is beneficial to collect light and reduce distortion; the diaphragm 9 is arranged between the first lens 1 and the second lens 2, which is beneficial to reduce the lens aperture; the second lens 2 has a negative focal power, which is beneficial to smoothly accept the turning light, reduce aberration, reduce lens sensitivity, and also beneficial to reduce the lens aperture; the third lens 3 and the sixth lens 6 both have a positive focal power, which is beneficial to turn the light and reduce the lens length; the fourth lens 4, the fifth lens 5 and the sixth lens 6 form a cemented lens, at least one group of cemented lenses reduces or eliminates chromatic aberration, improves imaging quality, the cemented lens improves the transmittance of the lens and reduces the assembly difficulty; the optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 5 are shown in table 9.

[0183] Table 9 Optical parameters of the low-cost high-definition vehicle-mounted front-view lens provided in embodiment 5

[0184]

[0185] From table 9, we can observe that the first lens 1 Nd1 is 1.910, the first lens 1 Vd1 is 35.300, the first lens 1 Nd1>1.79, Vd1>35, wherein Nd1 refers to the refractive index of the first lens 1, and Vd1 refers to the Abbe number of the first lens 1;

[0186] The second lens 2 Nd2 is 1.950, the second lens 2 Vd2 is 17.900, the second lens 2 Nd2>1.72, Vd2<29, wherein Nd2 refers to the refractive index of the second lens 2, and Vd2 refers to the Abbe number of the second lens 2;

[0187] The third lens 3 Nd3 is 1.810, the third lens 3 Vd3 is 40.900, the third lens 3 Nd3>1.74, Vd3<53, wherein Nd3 refers to the refractive index of the third lens 3, and Vd3 refers to the Abbe number of the third lens 3;

[0188] The fifth lens 5 Nd5 is 1.730, the fifth lens 5 Vd5 is 28.300, the fifth lens 5 Nd5<1.76, Vd5<53, wherein Nd5 refers to the refractive index of the fifth lens 5, and Vd5 refers to the Abbe number of the fifth lens 5;

[0189] The seventh lens 7Nd7 is 2.000, the seventh lens 7Vd7 is 28.300, the seventh lens 7Nd7 is greater than or equal to 1.8, and Vd7 is less than 47, wherein Nd7 refers to the refractive index of the seventh lens 7, and Vd7 refers to the Abbe number of the seventh lens 7;

[0190] The specification summary table of the low-cost high-definition vehicle front-view lens provided in Embodiment 5 is shown in Table 10.

[0191] Table 10 Specification summary table of the low-cost high-definition vehicle front-view lens provided in Embodiment 5

[0192] f BFL TTL FOV h D Example 5 15.24 3.4 32.5 34.4 9.252 10

[0193] From Table 10, we can observe that BFL / TTL = 0.105, which satisfies the condition BFL / TTL ≥ 0.1, wherein BFL is the distance from the image-side center of the eighth lens 8 of the high-definition vehicle front-view lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object-side surface of the first lens 1 to the imaging surface of the optical lens on the optical axis, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module.

[0194] From Table 10, we can observe that FOV / h / D = 0.372, which satisfies the condition 0.32 ≤ FOV / h / D ≤ 0.38, wherein FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the object-side surface of the first lens 1 corresponding to the maximum field of view of the optical lens, and h is the image height corresponding to the maximum field of view of the optical lens. When the high-definition vehicle front-view lens satisfies the condition 0.32 ≤ FOV / h / D ≤ 0.38, it is beneficial to realize a small aperture for the front lens.

[0195] From Table 10, we can observe that (FOV × f) / h = 56.664, which satisfies the condition formula 56 ≤ (FOV × f) / h ≤ 58, wherein FOV is the maximum field of view of the high-definition vehicle front-view lens, f is the total focal length of the optical lens, and h is the image height corresponding to the maximum field of view of the optical lens. By controlling the three indicators FOV, f, and h, when the condition formula 56 ≤ (FOV × f) / h ≤ 58 is satisfied, it is beneficial to reduce the distortion of the lens.

[0196] From Table 10, we can observe that TTL / f = 2.133, and the high-definition vehicle front-view lens satisfies the condition formula TTL / f ≤ 2.2, wherein TTL is the distance from the center of the object-side surface of the first lens 1 to the imaging surface of the optical lens on the optical axis, and f is the total focal length of the lens. This is beneficial to the miniaturization of the lens.

[0197] The high-definition vehicle-mounted front-view lens satisfies the following conditions: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, 0.35≤f6 / f≤0.9, where f1, f2, f3, and f6 are the focal lengths of the first lens 1, the second lens 2, the third lens 3, and the sixth lens 6, respectively, and f is the focal length of the entire lens group. By reasonably matching the focal lengths of the lenses, it is beneficial to reduce assembly sensitivity and control the back focus drift of the lens within a very small range at high and low temperatures, thus ensuring clear imaging.

[0198] This embodiment also provides a low-cost, high-definition vehicle-mounted front-view camera for use in autonomous driving as a vehicle front-view system.

[0199] like Figure 10 As shown in Example 5, the field curvature distortion diagram of the low-cost high-definition automotive front-view lens is presented. The left figure is a field curvature curve diagram, where the vertical axis of the field curvature curve is the field angle, and the horizontal axis is the distance of the image point from the paraxial image plane. T represents meridional field curvature, and S represents sagittal field curvature. The field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane, which is used as a function of the field coordinates. It is divided into meridional field curvature and sagittal field curvature. The right figure is a distortion curve diagram, where the vertical axis of the distortion diagram is the field angle, and the horizontal axis is the distortion percentage. Distortion belongs to the principal ray aberration and reflects the similarity of the object. The optical lens in this specific embodiment has a small optical field curvature, small distortion, and clear image.

[0200] The present invention provides a low-cost, high-definition vehicle-mounted front-view lens and its application, which has the following beneficial effects:

[0201] 1) This invention provides a low-cost high-definition vehicle front-view lens and its application, which solves the problems of high cost and complex processing of using aspherical glass. The low-cost high-definition vehicle front-view lens has the advantages of small optical field curvature, small distortion and clear imaging, and also reduces production costs.

[0202] 2) This invention provides a low-cost, high-definition automotive front-view lens and its application. The first lens has positive optical power, its object side is convex, and its image side is concave. The first lens is meniscus, which is beneficial for collecting light and reducing distortion. The aperture stop is located between the first lens and the second lens, which is beneficial for reducing the lens aperture. The second lens has negative optical power, which is beneficial for receiving refracted light more smoothly, reducing aberrations, reducing lens sensitivity, and also for reducing the lens aperture. The third lens and the sixth lens both have positive optical power, which is beneficial for refracting light and reducing the lens length.

[0203] 3) The application provides a low-cost high-definition vehicle-mounted front-view lens and an application thereof, at least one set of glued lenses in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can reduce or eliminate chromatic aberration, improve imaging quality, glued lenses improve lens transmittance, and reduce assembly difficulty.

[0204] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, modifications can be made to these features and embodiments to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all changes or equivalent replacements falling within the scope of the claims of the present application. In addition, under the guidance of the present application, modifications can be made to these features and embodiments to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A low cost high definition vehicle front view lens characterized in that, A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a parallel flat plate and an image plane IMA are sequentially arranged along an optical axis in an incident direction, wherein The first lens has positive refractive power, a convex object side surface and a concave image side surface; The second lens has negative refractive power, a concave object side surface and a concave or convex image side surface; The third lens has positive refractive power, a convex object side surface and a concave or convex image side surface; The fourth lens has positive refractive power, a convex or concave object side surface and a concave or convex image side surface; The fifth lens has negative refractive power, a convex or concave object side surface and a concave or convex image side surface; The sixth lens has positive refractive power, a convex object side surface and a convex image side surface; The seventh lens has positive refractive power, a convex or concave object side surface and a concave or convex image side surface; The eighth lens has negative refractive power, a concave or convex object side surface and a concave image side surface; The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all glass spherical lenses; The high-definition vehicle-mounted front-view lens satisfies the following conditions: 0.32≤(FOV / h) / D≤0.38, wherein FOV is the maximum field of view of the high-definition vehicle-mounted front-view lens; D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field of view of the high-definition vehicle-mounted front-view lens; and h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted front-view lens.

2. The low cost high definition vehicle front view lens according to claim 1, wherein, At least one of the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is a cemented lens.

3. The low cost high definition vehicle front view lens of claim 1, wherein, The first lens satisfies the following conditions: Nd1>1.79 and Vd1>35, wherein Nd1 is the refractive index of the first lens, and Vd1 is the Abbe number of the first lens; the second lens satisfies the following conditions: Nd2>1.72 and Vd2<29, wherein Nd2 is the refractive index of the second lens, and Vd2 is the Abbe number of the second lens; the third lens satisfies the following conditions: Nd3>1.74 and Vd3<53, wherein Nd3 is the refractive index of the third lens, and Vd3 is the Abbe number of the third lens; the fifth lens satisfies the following conditions: Nd5<1.76 and Vd5<53, wherein Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens; and the seventh lens satisfies the following conditions: Nd7≥1.8 and Vd7<47, wherein Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens.

4. The low cost high definition vehicle front view lens of claim 1, wherein, The high-definition vehicle-mounted front-view lens satisfies the following conditions: BFL / TTL≥0.1, wherein BFL is the distance from the center of the image side surface of the eighth lens of the high-definition vehicle-mounted front-view lens to the imaging plane of the high-definition vehicle-mounted front-view lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens to the imaging plane of the high-definition vehicle-mounted front-view lens on the optical axis.

5. The low cost high definition vehicle front view lens of claim 1, wherein, The maximum field of view angle FOV of the high-definition vehicle-mounted front-view lens, the total focal length value f of the high-definition vehicle-mounted front-view lens, and the image height h corresponding to the maximum field of view angle of the high-definition vehicle-mounted front-view lens satisfy the following condition formula: 56≤(FOV×f) / h≤58.

6. The low cost high definition vehicle front view lens of claim 1, wherein, The high-definition vehicle-mounted front-view lens satisfies the condition formula: TTL / f≤2.2, wherein TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the high-definition vehicle-mounted front-view lens on the optical axis, and f is the total lens focal length.

7. The low cost high definition vehicle front vision lens of claim 1, wherein, The high-definition vehicle-mounted front-view lens satisfies the condition formula: 1.75≤f1 / f≤3, -4≤f2 / f≤-0.6, 0.6≤f3 / f≤2.4, and 0.35≤f6 / f≤0.9, wherein f1, f2, f3, and f6 are the focal lengths of the first lens, the second lens, the third lens, and the sixth lens, respectively, and f is the total lens focal length.

8. The low cost high definition vehicle front view lens of claim 1, wherein, The first lens and the second lens are provided with a diaphragm.

9. The low-cost high-definition vehicle-mounted front-view lens according to any one of claims 1-8 is applied to automatic driving as a front-view system for a vehicle.

Images