A front view lens for a car

Abstract

The invention provides an automobile front-view lens, which has the advantages of miniaturization, large field of view and high imaging quality, and is characterized in that: a first lens has negative focal power, an object side surface is convex, and an image side surface is concave; a second lens has negative focal power, an object side surface is concave, and an image side surface is convex; a third lens has positive focal power, an object side surface is convex, and an image side surface is convex; a fourth lens has any one of positive focal power and negative focal power, an object side surface is concave or convex, and an image side surface is convex or concave; a fifth lens has any one of positive focal power and negative focal power, an object side surface is convex or concave, and an image side surface is convex; a sixth lens has positive focal power, an object side surface is convex, and an image side surface is concave; and the automobile front-view lens satisfies: FOV≥140°.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and is applicable to the field of automobile front-view systems and driving assistance, and specifically relates to an automobile front-view lens. Background Art

[0002] With the continuous development of intelligent and safe driving of automobiles, the requirements for active driving or assisted driving imaging lenses are constantly increasing. While maintaining the high resolution of the lens, the requirements for environmental stability are becoming increasingly higher, especially for the front-view lens that involves the driver's active safety.

[0003] In recent years, the design trend of front-view lenses has also been developing towards miniaturization. In the process of miniaturization of lens modules, people also hope that the lens has both high pixels and field of view, so as to facilitate the acquisition of a wider field of view. The field of view of existing front-view lenses is not large enough, which can easily lead to problems such as too small camera monitoring range and many blind spots. It is also not conducive to clear and effective recording and restoration of the incident, and can no longer meet the requirements of the front-view lens for higher and higher image resolution and clarity. Therefore, how to design a miniaturized, large field of view, and high-quality front-view lens is a current demand. Summary of the invention

[0004] In view of the above problems, the present invention provides a front-view lens for an automobile, which has the advantages of being small in size, having a large field of view, and having high imaging quality.

[0005] The technical solution is as follows: a front-view lens for automobiles, which includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side along the optical axis, characterized in that:

[0006] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0007] The second lens has negative optical power, its object side surface is concave, and its image side surface is convex;

[0008] The third lens has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0009] The fourth lens has any one of positive and negative optical power, and its object side surface is any one of concave and convex, and its image side surface is any one of convex and concave;

[0010] The fifth lens has any one of positive and negative refractive power, its object side surface is any one of convex and concave, and its image side surface is convex;

[0011] The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0012] The automotive front view lens meets the following requirements:

[0013] FOV ≥ 140°

[0014] Wherein, FOV is the maximum field of view angle of the front-view camera of the automobile.

[0015] Furthermore, the automotive front view lens satisfies the following relationship:

[0016] 0.5<|f1 / f|<3.5; |f2 / f|≥4.0; 1.0<|f3 / f|<3.0; 0.5<|f4 / f|<2.5; 0.5<|f5 / f|<2.5; 1.0<|f6 / f|<3.0; wherein f1, f2, f3, f4, f5, f6 are the focal lengths of the first lens to the sixth lens respectively, and f is the focal length of the entire group of the automotive front view lens.

[0017] Furthermore, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all glass lenses, and any one of the first lens and the sixth lens is a glass aspherical lens.

[0018] Furthermore, it also includes an aperture, which is located between any two adjacent lenses; it also includes a filter and a protective glass, the filter is arranged on the image side of the sixth lens, and the protective glass is arranged on the image side of the filter.

[0019] Furthermore, the fourth lens and the fifth lens are glued together to form a group of glued lenses.

[0020] Furthermore, the fourth lens and the fifth lens are separate lenses.

[0021] Furthermore, the first lens also satisfies the following conditions: 1.8<Nd1<1.9, 40<Vd1<50; wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens;

[0022] The second lens also satisfies the following conditions: 1.8<Nd2<2.0, 30<Vd2<40; wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens;

[0023] The third lens also satisfies the following conditions: 1.7<Nd3<1.8, 50<Vd3<60; wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens;

[0024] The fourth lens also satisfies the following conditions: 1.5<Nd4<1.7, 60<Vd4<70; wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens;

[0025] The fifth lens also satisfies the following conditions: 1.7<Nd5<1.8, 20<Vd5<30; wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens;

[0026] The sixth lens also satisfies the following conditions: 1.8<Nd6<1.9, 30<Vd6<50; wherein Nd6 is the light refractive index of the sixth lens, and Vd6 is the Abbe constant of the sixth lens.

[0027] Furthermore, the automobile front view lens meets the following conditions:

[0028] BFL / TTL<0.2

[0029] Among them, BFL is the distance from the center of the image side of the last lens of the automotive front-view lens to the imaging surface of the automotive front-view lens on the optical axis; TTL is the distance from the center of the object side of the first lens to the imaging surface of the automotive front-view lens on the optical axis.

[0030] Furthermore, the automobile front view lens meets the following conditions:

[0031] d / h / FOV<0.02

[0032] Among them, FOV is the maximum field of view angle of the automobile front-view lens; d is the maximum light clearance aperture of the object side of the first lens corresponding to the maximum field of view angle of the automobile front-view lens; and h is the image height corresponding to the maximum field of view angle of the automobile front-view lens, and FOV is the maximum field of view angle of the automobile front-view lens.

[0033] Furthermore, the automobile front view lens meets the following conditions:

[0034] TTL / h / FOV<0.03

[0035] Among them, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the automotive front-view lens on the optical axis, FOV is the maximum field of view angle of the automotive front-view lens; and h is the image height corresponding to the maximum field of view angle of the automotive front-view lens.

[0036] The automotive front-view lens of the present invention can produce an automotive front-view lens with a large field of view and high imaging quality by only using six glass lenses. It is not easy to have a shooting blind spot during the monitoring and shooting process, the field of view is large, and the imaging effect is good. When using it, the user can obtain more details from the picture, making the driving record and driving assistance more accurate, and having wide practicality. In addition, the present invention has a simple and compact structure and a small number of lenses, which is conducive to the miniaturization design of the lens, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural assembly diagram of the automotive front-view lens of the present invention;

[0038] Figure 2 is an MTF curve diagram of the automotive front view lens in the embodiment at 25°C;

[0039] Figure 3 is a defocus curve diagram of the automotive front view lens in the embodiment at 25°C;

[0040] Figure 4 is a defocus curve diagram of the automotive front view lens in the embodiment at 85°C;

[0041] Figure 5 It is a defocus curve diagram of the automotive front view lens in the embodiment at -40°C. DETAILED DESCRIPTION

[0042] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0044] See Figure 1 The automotive front view lens of the present invention comprises, in order from the object side to the image side along the optical axis: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6. Specifically:

[0045] The first lens 1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave;

[0046] The second lens 2 has negative optical power, its object side surface S3 is concave, and its image side surface S4 is convex;

[0047] The third lens 3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is convex;

[0048] The fourth lens 4 has positive refractive power, and its object side surface S8 is convex, and its image side surface is convex;

[0049] The fifth lens 5 has negative refractive power, and its object-side surface S9 is concave, and its image-side surface S10 is convex;

[0050] The sixth lens 6 has positive refractive power, its object side surface is convex S11, and its image side surface S12 is concave;

[0051] The lens has better imaging quality through the reasonable distribution of optical power;

[0052] Car front view lens meets:

[0053] FOV ≥ 140°

[0054] Among them, FOV is the maximum field of view angle of the car's front-view lens, thus achieving wide angle.

[0055] Furthermore, the automotive front view lens satisfies the following relationship:

[0056] 0.5<|f1 / f|<3.5;|f2 / f|≥4.0;1.0<|f3 / f|<3.0;0.5<|f4 / f|<2.5;0.5<|f5 / f|<2.5;1.0<|f6 / f|<3.0;wherein, f1, f2, f3, f4, f5, f6 are the focal lengths of the first lens to the sixth lens respectively, and f is the focal length of the entire group of the automotive front view lens. Through the reasonable distribution of focal lengths, the system has better imaging quality and lower sensitivity.

[0057] In order to further optimize the performance of the optical lens, the automotive front view lens of this embodiment also includes an aperture 7, a filter 8, and a protective glass 9. The aperture 7 is arranged between the third lens 3 and the fourth lens 4. The filter 8 is arranged on the image plane side of the sixth lens 6. The main function of the filter 8 is to filter the interference of the infrared band on the imaging. The protective glass 9 is arranged on the image plane side of the filter 8. The main function of the protective glass 9 is to protect the image sensor.

[0058] In this embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are all glass lenses. The first lens 1 is a glass aspherical lens, which adopts a full glass design and has more stable thermal performance in high and low temperature use environments, and has strong and stable ambient temperature performance, which greatly improves the safety of autonomous driving. Therefore, the optical lens according to the above embodiment of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0059] In traditional designs, when adopting an all-glass structure to maintain the same imaging performance, the number of lenses is bound to increase, and the total optical length of the lens is bound to increase accordingly, which is contrary to the development trend of miniaturization of lenses. However, the automotive front-view lens of the present invention has a good balance between the requirements of imaging performance and miniaturization. It adopts a six-piece optical lens without increasing the number of lenses.

[0060] When plastic lenses are used, there is a problem of defocused image blur caused by temperature changes due to the large thermal expansion coefficient of plastic. At high and low temperatures, the thermal expansion coefficient of plastic lenses is larger than that of glass lenses, which naturally leads to the environmental stability of the glass-plastic hybrid structure being worse than that of all-glass. Glass lenses are more stable than glass-plastic hybrids. The automotive front-view lens of the present invention adopts an all-glass design and has strong and stable environmental temperature performance. The aspheric lens can not only shorten the optical length of the lens, but also the aspheric characteristics have the characteristics of improving imaging performance. By using only one glass aspheric lens, while achieving high resolution and strong and stable environmental temperature performance of the vehicle-mounted lens, it also has the advantages of relative miniaturization and low cost, avoiding the use of a large number of glass aspheric lenses that make the lens cost too high.

[0061] The automotive front view lens provided in this embodiment is easy to process and has low cost. The lens used therein has only one glass aspherical lens, and the rest are spherical lenses. While ensuring high image quality, the lens material can be produced by general domestic manufacturers, thereby reducing processing costs.

[0062] At the same time, the glass lens design can improve brightness, enhance transmittance, and obtain good imaging quality; at the same time, because the lenses in the design are all made of glass, they are resistant to high temperatures and moisture, have stable performance, and are suitable for industrial use. The overall imaging of this type of automotive front-view lens is higher and the field of view is larger, so the automotive front-view lens using this structure can effectively shorten the total length of the lens and reduce the size of the lens.

[0063] In this embodiment, the fourth lens 4 and the fifth lens 5 are glued together to form a group of glued lenses, which can reduce system chromatic aberration; of course, in other embodiments of the present invention, the fourth lens 4 and the fifth lens 5 can also be separate lenses.

[0064] In addition, in this implementation, the front view camera of the car meets the following conditions:

[0065] The first lens 1 also satisfies the following conditions: 1.8<Nd1<1.9, 40<Vd1<50; wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens;

[0066] The second lens 2 also satisfies the following conditions: 1.8<Nd2<2.0, 30<Vd2<40; wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens;

[0067] The third lens 3 also satisfies the following conditions: 1.7<Nd3<1.8, 50<Vd3<60; wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens;

[0068] The fourth lens 4 also satisfies the following conditions: 1.5<Nd4<1.7, 60<Vd4<70; wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens;

[0069] The fifth lens 5 also satisfies the following conditions: 1.7<Nd5<1.8, 20<Vd5<30; wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens;

[0070] The sixth lens 6 also satisfies the following conditions: 1.8<Nd6<1.9, 30<Vd6<50; wherein Nd6 is the light refractive index of the sixth lens, and Vd6 is the Abbe constant of the sixth lens. By specifying the ratio of the lens dispersion coefficients, it is helpful to improve the performance of the optical system within the conditional range.

[0071] In addition, in this embodiment, the front view lens of the car meets the conditions: BFL / TTL<0.2,

[0072] Among them, BFL is the distance from the center of the image side of the last lens of the car front view lens to the imaging surface of the car front view lens on the optical axis; TTL is the distance from the center of the object side of the first lens to the imaging surface of the car front view lens on the optical axis.

[0073] Furthermore, the front view lens of the car meets the following conditions: d / h / FOV<0.02,

[0074] Among them, FOV is the maximum field of view angle of the car's front-view lens; d is the maximum aperture of the object side of the first lens corresponding to the maximum field of view angle of the car's front-view lens; and h is the image height corresponding to the maximum field of view angle of the car's front-view lens. FOV is the maximum field of view angle of the car's front-view lens.

[0075] Furthermore, the front view lens of the car meets the following conditions:

[0076] TTL / h / FOV<0.03

[0077] Among them, TTL is the distance from the center of the object side of the first lens to the imaging surface of the automobile front view lens on the optical axis, FOV is the maximum field of view angle of the automobile front view lens; h is the image height corresponding to the maximum field of view angle of the automobile front view lens. By controlling the focal length and maximum field of view angle and other parameters of the automobile front view lens, the optical distortion and image deformation are relatively small during the imaging process, ensuring the imaging quality, facilitating the subsequent recognition and judgment of the imaging details, and providing good imaging assistance for driving assistance.

[0078] Specifically, the present invention provides specific optical parameters of an automotive front-view lens according to one embodiment, as shown in the following table:

[0079]

[0080]

[0081] Table 1

[0082] In Table 1, when the curvature radius of the aperture and protective glass surface is Infinity, it means that the surface is a plane.

[0083] The optical performance parameters of the automotive front view lens of this embodiment are shown in Table 2:

[0084] parameter TTL(mm) f(mm) d(mm) h(mm) FOV(°) BFL(mm) Numeric 22.5 4.47 9.6 6.3 140° 2.9

[0085] Table 2

[0086] In this embodiment, the maximum field of view angle FOV of the automotive front view lens, the maximum light clearance aperture d of the object side surface S1 of the first lens L1 corresponding to the maximum field of view angle of the automotive front view lens, and the image height h corresponding to the maximum field of view angle of the automotive front view lens satisfy d / h / FOV=0.01; the optical back focus BFL of the automotive front view lens and the total optical length TTL of the automotive front view lens satisfy BFL / TTL=0.13; and the total optical length TTL of the automotive front view lens, the maximum field of view angle FOV of the automotive front view lens, and the image height h corresponding to the maximum field of view angle of the automotive front view lens satisfy TTL / h / FOV=0.026. The optical lens meets the design requirements of large field of view and miniaturization, and has high pixels and shooting field of view, excellent optical characteristics, and wide practicality.

[0087] In this embodiment, the first lens 1 is an aspherical lens, and the aspherical surface shapes are described as follows:

[0088]

[0089] Among them, Z(h) is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis, c=1 / r, r represents the radius of curvature of the aspherical mirror surface, k is the cone coefficient conic, and A, B, C, D, E, F, G, and H are the coefficients of the high-order terms of the aspherical surface.

[0090] The aspheric coefficients are shown in Table 3 below:

[0091] Surface number K A B C D E F G H S1 -5.297 0 -4.069e-3 -5.203e-4 1.500e-6 -3.789e-7 -2.419e-9 0 0 S2 -0.946 0 2.555e-3 1.039e-3 -9.437e-5 9.2491e-7 9.290e-8 0 0

[0092] Table 3

[0093] The optical theory simulation is performed on the vehicle-mounted optical lens in the above embodiment. Figure 2 is the MTF curve of the vehicle-mounted optical lens in the above embodiment at 25°C, Figure 2The horizontal axis is the spatial frequency, and the vertical axis is the contrast; TSDiff.Limit is the diffraction limit in the meridian and sagittal directions, and TS0.00 (deg) represents the diffraction curve in the meridian and sagittal directions at the image plane 0.00 field of view; the MTF value is used to evaluate the imaging clarity of the vehicle lens, and the value range is 0 to 1. The larger the MTF, the better the imaging quality of the system. Figure 2 It can be seen that the MTF curves in the meridian direction T and sagittal direction S of each field of view are dense, which means that the vehicle-mounted lens has good consistency on the entire imaging surface IMA and can produce high-quality and clear images on the entire imaging surface.

[0094] Figure 3 is a defocus curve diagram of the automotive front-view optical lens in the above embodiment at 25°C, Figure 4 is a defocus curve diagram of the automotive front-view optical lens in the above embodiment at 85°C, Figure 5 is a defocus curve of the automotive front-view optical lens in the above embodiment at -40°C, with the horizontal axis being the defocus amount in millimeters. Figure 3 , 4 5 It can be seen that the automotive front-view optical lens in this embodiment ensures the imaging requirements of stable optical characteristics in the range of low temperature -40°C to high temperature 85°C, realizes the imaging performance of the optical system adaptively adjusted in the range of -40°C to high temperature 85°C, and has strong stable ambient temperature performance.

[0095] In an embodiment of the present invention, another automotive front-view optical lens is provided. Specifically,

[0096] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0097] The second lens has negative optical power, its object side surface is concave, and its image side surface is convex;

[0098] The third lens has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0099] The fourth lens has negative optical power, and its object side surface is concave, and its image side surface is concave;

[0100] The fifth lens has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0101] The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0102] In addition, in this embodiment, the fourth lens and the fifth lens are separate lenses, there is an air gap between any two adjacent lenses, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all glass lenses, and the sixth lens is an aspherical lens.

[0103] In an embodiment of the present invention, there is also a front-view optical lens for an automobile, specifically,

[0104] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0105] The second lens has negative power, its object side surface is concave, and its image side surface is convex;

[0106] The third lens has positive power, its object side surface is convex, and its image side surface is convex;

[0107] The fourth lens has positive refractive power, and its object side surface is concave and its image side surface is concave;

[0108] The fifth lens has negative power, and its object side surface is convex, and its image side surface is convex;

[0109] The sixth lens has positive power, its object side surface is convex, and its image side surface is concave;

[0110] In addition, in this embodiment, the fourth lens and the fifth lens are cemented lenses, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all glass lenses, and the first lens is an aspherical lens.

[0111] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A front-view lens for automobiles, comprising, in order from the object side to the image side along the optical axis: The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are characterized by: The first lens has negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, its object side surface is concave, and its image side surface is convex; The third lens has positive refractive power, and its object side surface is convex, and its image side surface is convex; The fourth lens has any one of positive and negative optical power, and its object side surface is any one of concave and convex, and its image side surface is any one of convex and concave; The fifth lens has any one of positive and negative refractive power, its object side surface is any one of convex and concave, and its image side surface is convex; The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The automotive front view lens meets the following requirements: FOV ≥ 140° Wherein, FOV is the maximum field of view angle of the front view lens of the vehicle; The automotive front view lens satisfies the following relationship: 0.5<|f1 / f|<3.5;|f2 / f|≥4.0;1.0<|f3 / f|<3.0;0.5<|f4 / f|<2.5;0.5<|f5 / f|<2.5;1.0<|f6 / f|<3.0;wherein, f1, f2, f3, f4, f5, f6 are the focal lengths of the first lens to the sixth lens respectively, and f is the focal length of the entire group of the automotive front view lens; The first lens also satisfies the following conditions: 1.8<Nd1<1.9, 40<Vd1<50; wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; The second lens also satisfies the following conditions: 1.8<Nd2<2.0, 30<Vd2<40; wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; The third lens also satisfies the following conditions: 1.7<Nd3<1.8, 50<Vd3<60; wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens; The fourth lens also satisfies the following conditions: 1.5<Nd4<1.7, 60<Vd4<70; wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; The fifth lens also satisfies the following conditions: 1.7<Nd5<1.8, 20<Vd5<30; wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; The sixth lens also satisfies the following conditions: 1.8<Nd6<1.9, 30<Vd6<50; wherein Nd6 is the light refractive index of the sixth lens, and Vd6 is the Abbe constant of the sixth lens; The automotive front view lens meets the following conditions: BFL / TTL<0.2, Wherein, BFL is the distance from the center of the image side of the last lens of the automotive front-view lens to the imaging surface of the automotive front-view lens on the optical axis; TTL is the distance from the center of the object side of the first lens to the imaging surface of the automotive front-view lens on the optical axis; The automotive front view lens meets the following conditions: d / h / FOV<0.02, Wherein, FOV is the maximum field of view angle of the automotive front-view lens; d is the maximum aperture of the object side of the first lens corresponding to the maximum field of view angle of the automotive front-view lens; and h is the image height corresponding to the maximum field of view angle of the automotive front-view lens, and FOV is the maximum field of view angle of the automotive front-view lens; The automotive front view lens meets the following conditions: TTL / h / FOV<0.03 Among them, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the automotive front-view lens on the optical axis, FOV is the maximum field of view angle of the automotive front-view lens; and h is the image height corresponding to the maximum field of view angle of the automotive front-view lens.

2. The automotive front view lens according to claim 1, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all glass lenses, and any one of the first lens and the sixth lens is a glass aspherical lens.

3. The automotive front view lens according to claim 1, characterized in that: It also includes an aperture, which is located between any two adjacent lenses; it also includes a filter and a protective glass, the filter is arranged on the image side of the sixth lens, and the protective glass is arranged on the image side of the filter.

4. The automotive front view lens according to claim 1, characterized in that: The fourth lens and the fifth lens are cemented together to form a group of cemented lenses.

5. The automotive front view lens according to claim 1, characterized in that: The fourth lens and the fifth lens are separate lenses.

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