Vehicle-mounted lens

Abstract

This invention discloses a vehicle-mounted lens, comprising, from the object side to the image side, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, an aperture stop, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an image plane. The first lens, with its large aperture, can collect more light information at the same focal length, achieving clear imaging in low light and correcting axial chromatic aberration. The second, third, fourth, fifth, sixth, and seventh lenses correct system chromatic aberration, spherical aberration, and image plane curvature. The vehicle-mounted lens is confocal day and night, with a total optical length controlled within 17.5mm and a field of view of up to 150°, thus providing a high-performance, wide-field-of-view, day-and-night confocal vehicle-mounted lens.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and more particularly to automotive lenses. Background Technology

[0002] With the rapid development of intelligent driver assistance systems, various in-vehicle cameras are now widely used in various vehicle models. As driver assistance systems become increasingly sophisticated, the demand for cameras that monitor the driver's condition is increasing. To accurately capture the driver's facial expressions and state, and to provide timely and accurate warnings of fatigue and dangerous driving, new and higher requirements are placed on the clear imaging of in-vehicle monitoring cameras. Existing monitoring cameras suffer from several problems, including a small field of view, resulting in a limited monitoring range, blind spots, large size, inconvenient installation and use, poor high and low temperature stability, and generally low resolution. Summary of the Invention

[0003] The main objective of this invention is to propose a vehicle-mounted lens, which aims to provide a high-performance, wide-angle, day-night confocal lens for vehicles.

[0004] To achieve the above objectives, the present invention proposes a vehicle-mounted lens, wherein the vehicle-mounted lens has an object side and an image side arranged opposite to each other along the optical axis. The vehicle-mounted lens includes, from the object side to the image side, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, an aperture, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an image plane, so that the total optical length of the vehicle-mounted lens is controlled within 17.5 mm and the field of view can reach 150°.

[0005] Optionally, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7. The vehicle-mounted lens satisfies the following conditions:

[0006] -1.40≤f1 / f≤-1.52; and -31≤f2 / f≤-32.3, and 2.4≤f3 / f≤3.6; and 2.0≤f4 / f≤3; and -35.5≤f5 / f≤-35; and 6.0≤f6 / f≤6.8; and -4.8≤f7 / f≤-4.

[0007] Optionally, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0008] The object-side surface of the second lens is concave, and the image-side surface is also concave.

[0009] The object-side surface of the third lens is convex, and the image-side surface is also convex.

[0010] The object-side surface of the fourth lens is convex, and the image-side surface is also convex.

[0011] The object-side surface of the fifth lens is concave, and the image-side surface is also concave.

[0012] The object-side surface of the sixth lens is convex, and the image-side surface is also convex.

[0013] The object-side surface of the seventh lens is convex, and the image-side surface is concave.

[0014] Optionally, both the first lens and the third lens are glass spherical lenses;

[0015] The second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all plastic aspherical lenses.

[0016] Optionally, the vehicle-mounted lens further includes a first filter, which is disposed between the third lens and the fourth lens.

[0017] Optionally, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0018] The object-side surface of the second lens is concave, and the image-side surface is convex.

[0019] The object-side surface of the third lens is convex, and the image-side surface is also convex.

[0020] The object-side surface of the fourth lens is convex, and the image-side surface is also convex.

[0021] The object-side surface of the fifth lens is concave, and the image-side surface is also concave.

[0022] The object-side surface of the sixth lens is convex, and the image-side surface is also convex.

[0023] The object-side surface of the seventh lens is concave, and the image-side surface is also concave.

[0024] Optionally, the first lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all glass spherical lenses;

[0025] Both the second lens and the seventh lens are plastic aspherical lenses.

[0026] Optionally, the refractive index of the first lens is Nd1, and the dispersion coefficient is Vd1, wherein Nd1≤1.8 and Vd1≥50;

[0027] The refractive index of the second lens is Nd2, and the dispersion coefficient is Vd2, where Nd2≤1.7 and Vd2≤25;

[0028] The refractive index of the third lens is Nd3, and the dispersion coefficient is Vd3, wherein Nd3≤2.0 and Vd3≥40;

[0029] The fourth lens has a refractive index of Nd4 and a dispersion coefficient of Vd4, wherein Nd4 ≤ 1.6 and Vd4 ≥ 70;

[0030] The fifth lens has a refractive index of Nd5 and a dispersion coefficient of Vd5, wherein Nd5≤2.0 and Vd5≥20;

[0031] The refractive index of the sixth lens is Nd6, and the dispersion coefficient is Vd6, where Nd6≤2 and Vd6≥70;

[0032] The refractive index of the seventh lens is Nd7, and the dispersion coefficient is Vd7, where Nd6≤2 and Vd6≥50.

[0033] Optionally, the fifth lens and the sixth lens are cemented together; and / or,

[0034] The second filter is disposed between the seventh lens and the image plane.

[0035] Optionally, the vehicle-mounted lens satisfies the following condition: BFL / TTL > 0.169, where BFL is the distance from the center of the image-side surface of the sixth lens of the vehicle-mounted lens to the image plane of the vehicle-mounted lens on the optical axis, and TTL is the distance from the center of the object-side surface of the first lens to the image plane of the optical lens on the optical axis; and / or,

[0036] The vehicle-mounted lens satisfies the following condition: 62.5≤(FOV×f) / h≤63.5, where FOV is the maximum field of view of the vehicle-mounted lens, f is the focal length of the vehicle-mounted lens, and h is the image height corresponding to the maximum field of view of the vehicle-mounted lens.

[0037] In the technical solution provided by this invention, from the object side to the image side, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, an aperture stop, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an image plane are arranged sequentially. The first lens, with its large aperture, can collect more light information at the same focal length, achieving clear imaging in low light and correcting axial chromatic aberration. The aperture stop limits the beam's aperture along the axis, blocking some light during zooming, reducing light spots, improving image contrast, and contributing to improved image quality. The second lens... The third, fourth, fifth, sixth, and seventh lenses can correct system chromatic aberration, spherical aberration, and image plane curvature. The total optical length of the vehicle-mounted lens is controlled within 17.5mm, and the field of view can reach 150°. The vehicle-mounted lens has a large field of view, giving it a wide range of field of view and more complete information acquisition. At the same time, through optimization, the lens does not defocus in environmental conditions of -40℃ to +105℃, and can work normally in both day and night conditions. It can also work stably in environments with large temperature differences between day and night, and has a wide range of applications. Therefore, it provides a high-performance, wide field of view, and day-night confocal vehicle-mounted lens. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of embodiment 1 of the vehicle-mounted lens provided by the present invention;

[0040] Figure 2 for Figure 1 Distortion and field curvature images of a vehicle-mounted camera at room temperature (25℃);

[0041] Figure 3 for Figure 1 MTF curve of a vehicle-mounted camera in the visible light band;

[0042] Figure 4 This is a schematic diagram of the structure of embodiment 2 of the vehicle-mounted lens provided by the present invention;

[0043] Figure 5 for Figure 4 Distortion and field curvature images of a vehicle-mounted camera at room temperature (25℃);

[0044] Figure 6 for Figure 4 MTF curve of vehicle-mounted lens in the visible light band.

[0045] Explanation of icon numbers:

[0046] 1 First lens 6 Sixth lens 2 Second lens 7 Seventh Lens 3 Third lens 8 aperture 4 Fourth lens 9 Photosensitive chip 5 Fifth lens

[0047] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0050] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0051] With the rapid development of intelligent driver assistance systems, various in-vehicle cameras are now widely used in various vehicle models. As driver assistance systems become increasingly sophisticated, the demand for cameras that monitor the driver's condition is increasing. To accurately capture the driver's facial expressions and state, and to provide timely and accurate warnings of fatigue and dangerous driving, new and higher requirements are placed on the clear imaging of in-vehicle monitoring cameras. Existing monitoring cameras suffer from several problems, including a small field of view, resulting in a limited monitoring range, blind spots, large size, inconvenient installation and use, poor high and low temperature stability, and generally low resolution.

[0052] To address the above problems, this invention provides a vehicle-mounted lens. Figure 1 This is a specific embodiment of the vehicle-mounted lens provided by the present invention.

[0053] Please see Figure 1 The vehicle-mounted lens has an object side and an image side arranged opposite to each other along the optical axis. The vehicle-mounted lens includes a first lens 1 with negative optical power, a second lens 2 with negative optical power, a third lens 3 with positive optical power, an aperture 8, a fourth lens 4 with positive optical power, a fifth lens 5 with negative optical power, a sixth lens 6 with positive optical power, a seventh lens 7 with negative optical power, and an image plane arranged sequentially from the object side to the image side, so that the total optical length of the vehicle-mounted lens is controlled within 17.5mm and the field of view can reach 150°.

[0054] In the technical solution provided by this invention, from the object side to the image side, a first lens 1 with negative optical power, a second lens 2 with negative optical power, a third lens 3 with positive optical power, an aperture 8, a fourth lens 4 with positive optical power, a fifth lens 5 with negative optical power, a sixth lens 6 with positive optical power, a seventh lens 7 with negative optical power, and an image plane are arranged sequentially. The first lens 1, with its large aperture, can collect more light information at the same focal length, achieving clear imaging in low light and correcting axial chromatic aberration. The aperture 8 limits the on-axis light beam aperture, blocking some light during zooming, reducing light spots, improving image contrast, and contributing to improved image quality. The second lens 1... Lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 can correct system chromatic aberration, spherical aberration, and image plane curvature. The total optical length of the vehicle-mounted lens is controlled within 17.5mm, and the field of view can reach 150°. The vehicle-mounted lens has a large field of view, giving it a wide range of field of view and more complete information acquisition. At the same time, through optimization, the lens does not defocus in environmental conditions of -40℃ to +105℃, and can work normally in both day and night conditions. It can also work stably in environments with large temperature differences between day and night, and has a wide range of applications. Therefore, it provides a high-performance, wide field of view, day and night confocal vehicle-mounted lens.

[0055] Specifically, in this embodiment, the focal length of the first lens 1 is f1, the focal length of the second lens 2 is f2, the focal length of the third lens 3 is f3, the focal length of the fourth lens 4 is f4, the focal length of the fifth lens 5 is f5, the focal length of the sixth lens 6 is f6, and the focal length of the seventh lens 7 is f7. The vehicle-mounted lens satisfies the following conditions: -1.40≤f1 / f≤-1.52; and -31≤f2 / f≤-32.3; and 2.4≤f3 / f≤3.6; and 2.0≤f4 / f≤3; and -35.5≤f5 / f≤-35; and 6.0≤f6 / f≤6.8; and -4.8≤f7 / f≤-4.

[0056] In a specific embodiment 1, the object-side surface of the first lens 1 is convex, and the image-side surface is concave; the object-side surface of the second lens 2 is concave, and the image-side surface is concave; the object-side surface of the third lens 3 is convex, and the image-side surface is convex; the object-side surface of the fourth lens 4 is convex, and the image-side surface is convex; the object-side surface of the fifth lens 5 is concave, and the image-side surface is concave; the object-side surface of the sixth lens 6 is convex, and the image-side surface is convex; and the object-side surface of the seventh lens 7 is convex, and the image-side surface is concave.

[0057] Specifically, because glass lenses are less susceptible to focus shift due to thermal expansion and contraction, they effectively resist heat-induced lens deformation, maintaining high precision over extended periods. In this embodiment, both the first lens 1 and the third lens 3 are glass spherical lenses. By using spherical lenses, assembly sensitivity is reduced while ensuring image quality and reliability, thus improving the yield rate. Furthermore, in existing automotive lenses of the same type, plastic aspherical lenses are used to achieve confocal focusing and control costs. This results in poor lens reliability and an inability to adapt to environments with large temperature differences. To ensure better stability for the automotive lens while also considering cost, in this embodiment, plastic lenses are used because they have strong impact resistance, are lightweight, and have low cost. The second lens 2, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 are all plastic aspherical lenses. The characteristic of aspherical lenses is that their curvature changes continuously from the center to the periphery, unlike spherical lenses which have a constant curvature from the center to the periphery. Aspherical lenses have better curvature radius characteristics, which has the advantages of improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving the image quality of the lens. Furthermore, using glass lenses reduces the impact of temperature on the lens's optical performance. The automotive lens uses a glass-plastic hybrid material, which not only saves costs and has strong impact resistance, but also ensures the stability of the system and its adaptability to high and low temperatures.

[0058] Thus, by rationally designing the optical parameters and materials of each lens, the vehicle-mounted lens can avoid defocusing in high-temperature environments and ensure clear resolution. The system uses plastic material with extremely low water absorption while fully considering the changes in refractive index and Abbe number of various lens materials at high and low temperatures, matching the changes in surface shape and air gap. This achieves a positive and negative match of the changes in various factors such as high and low temperatures and humidity, ensuring the synchronization and clarity of the image plane in high and low temperature and different humidity environments.

[0059] It should be noted that, in this embodiment 1, the basic parameters of the curvature radius, thickness, and material of each lens type in the vehicle-mounted optical lens are shown in Table 1, where the units of curvature radius and thickness are millimeters (mm).

[0060] Table 1

[0061]

[0062]

[0063] The surface shapes of each facet of the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens satisfy the following formula:

[0064]

[0065] Where z represents the axial sagitta in the Z direction of the aspherical surface; y represents the height of the aspherical surface; c represents the curvature of the fitted sphere, which is the reciprocal of the radius of curvature; k represents the conic coefficient; and A, B, C, D, E, and F represent the higher-order aspherical coefficients, respectively. The shape and size of the aspherical surfaces on the object side and image side of the lens can be set using the above parameters.

[0066] The aspheric coefficients are shown in Table 2 below:

[0067] Table 2

[0068]

[0069]

[0070] Table 2 shows a design value for the aspherical coefficient of the lens in the vehicle-mounted lens described in Embodiment 1. The specific value can be adjusted according to product requirements and is not a limitation of the embodiments of the present invention.

[0071] Furthermore, in this embodiment, the vehicle-mounted lens also includes a first filter, which is disposed between the third lens 3 and the fourth lens 4. The first filter can effectively filter out stray light in non-operating wavelength bands to reduce optical noise, thereby reducing difficulties for subsequent optoelectronic module processing and improving image quality.

[0072] Figure 2 The image shows the distortion and field curvature of the vehicle-mounted lens according to Embodiment 1 of the present invention at a normal temperature of 25°C. Figure 3 The MTF curve of a vehicle-mounted lens according to Embodiment 1 of the present invention is shown. As can be seen from the figure above, the spherical aberration, field curvature, and distortion of the optical system in this embodiment can be well corrected.

[0073] In another specific embodiment 2, the object-side surface of the first lens 1 is convex and the image-side surface is concave; the object-side surface of the second lens 2 is concave and the image-side surface is convex; the object-side surface of the third lens 3 is convex and the image-side surface is convex; the object-side surface of the fourth lens 4 is convex and the image-side surface is convex; the object-side surface of the fifth lens 5 is concave and the image-side surface is concave; the object-side surface of the sixth lens 6 is convex and the image-side surface is convex; and the object-side surface of the seventh lens 7 is concave and the image-side surface is concave.

[0074] Specifically, in this embodiment, the first lens 1, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are all glass spherical lenses; the second lens 2 and the seventh lens 7 are both plastic aspherical lenses.

[0075] More specifically, the first lens 1 has a refractive index of Nd1 and a dispersion coefficient of Vd1, where Nd1 ≤ 1.8 and Vd1 ≥ 50; the second lens 2 has a refractive index of Nd2 and a dispersion coefficient of Vd2, where Nd2 ≤ 1.7 and Vd2 ≤ 25; the third lens 3 has a refractive index of Nd3 and a dispersion coefficient of Vd3, where Nd3 ≤ 2.0 and Vd3 ≥ 40; and the fourth lens 4 has a refractive index of Nd4. The dispersion coefficient is Vd4, where Nd4≤1.6 and Vd4≥70; the refractive index of the fifth lens 5 is Nd5, and the dispersion coefficient is Vd5, where Nd5≤2.0 and Vd5≥20; the refractive index of the sixth lens 6 is Nd6, and the dispersion coefficient is Vd6, where Nd6≤2 and Vd6≥70; the refractive index of the seventh lens 7 is Nd7, and the dispersion coefficient is Vd7, where Nd6≤2 and Vd6≥50.

[0076] It should be noted that, in this embodiment 2, the basic parameters of the curvature radius, thickness, and material of each lens type in the vehicle-mounted optical lens are shown in Table 3, where the units of curvature radius and thickness are millimeters (mm).

[0077] Table 3

[0078]

[0079] The surface shapes of each facet of the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens satisfy the following formula:

[0080]

[0081] Where z represents the axial sagitta in the Z direction of the aspherical surface; y represents the height of the aspherical surface; c represents the curvature of the fitted sphere, which is the reciprocal of the radius of curvature; k represents the conic coefficient; and A, B, C, D, E, and F represent the higher-order aspherical coefficients, respectively. The shape and size of the aspherical surfaces on the object side and image side of the lens can be set using the above parameters.

[0082] The aspheric coefficients are shown in Table 4 below:

[0083] Table 4

[0084]

[0085] Table 4 shows a design value for the aspherical coefficient of the lens in the vehicle-mounted lens described in Embodiment 2. The specific value can be adjusted according to product requirements and is not a limitation of the embodiments of the present invention.

[0086] Furthermore, in Embodiment 2, to improve the image quality of the optical system, reduce light energy loss, increase imaging clarity, and protect the scale surface, the manufacturing process is further optimized to meet design requirements. This involves the rational use of cemented components, appropriate allocation of optical power, and consideration of the thermal parameters of the glass material. This effectively corrects aberrations and achieves a heat-free imaging effect at high and low temperatures, while also effectively reducing chromatic aberration to achieve a confocal imaging surface in both the visible and near-infrared bands, ensuring simultaneous clarity and meeting the requirements for day and night use. The fifth lens 5 and the sixth lens 6 are cemented together. This effectively corrects chromatic aberration in the visible and infrared bands, facilitating the realization of confocal imaging in both bands.

[0087] In this embodiment 2, the second filter is disposed between the seventh lens 7 and the image plane.

[0088] Figure 5 The image shows the distortion and field curvature of the vehicle-mounted lens according to Embodiment 2 of the present invention at a normal temperature of 25°C. Figure 6 The MTF curve of a vehicle-mounted lens according to Embodiment 2 of the present invention is shown. As can be seen from the figure above, the spherical aberration, field curvature, and distortion of the optical system in this embodiment can be well corrected.

[0089] In the embodiments provided by the present invention, the vehicle-mounted lens satisfies the following condition: BFL / TTL > 0.169, where BFL is the distance from the center of the image-side surface of the sixth lens 6 of the vehicle-mounted lens to the image plane of the vehicle-mounted 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 image plane of the optical lens on the optical axis; and / or,

[0090] The vehicle-mounted lens satisfies the following condition: 62.5≤(FOV×f) / h≤63.5, where FOV is the maximum field of view of the vehicle-mounted lens, f is the focal length of the vehicle-mounted lens, and h is the image height corresponding to the maximum field of view of the vehicle-mounted lens.

[0091] Specifically, the vehicle-mounted lens also includes a photosensitive chip 9. The surface of the photosensitive chip 9 facing the object is the image plane, which can be the surface of a camera element such as a CCD or CMOS. It is understood that the light carrying the information of the object being photographed can pass through the first lens 1, the second lens 2, the third lens 3, the aperture 8, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 in sequence, and finally be imaged on the image plane.

[0092] The present invention also provides a motor vehicle, the motor vehicle including the above-described vehicle-mounted lens. Since the motor vehicle includes the vehicle-mounted lens, the specific structure of the vehicle-mounted lens is as described in the above embodiments. Since the vehicle-mounted lens of this motor vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0093] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vehicle-mounted camera, characterized by comprising: The vehicle-mounted lens has an object side and an image side arranged opposite each other along the optical axis. The lens comprises, from the object side to the image side, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, an aperture, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an image plane, arranged sequentially from the object side to the image side. This arrangement ensures that the total optical length of the vehicle-mounted lens is controlled within 17.5 mm, and the field of view can reach 150°. The vehicle-mounted lens meets the following conditions: Wherein, the object-side surface of the first lens is numbered 1, and the image-side surface is numbered 2; the object-side surface of the second lens is numbered 3, and the image-side surface is numbered 4; the object-side surface of the third lens is numbered 5, and the image-side surface is numbered 6; the object-side surface of the fourth lens is numbered 8, and the image-side surface is numbered 9; the object-side surface of the fifth lens is numbered 10, and the image-side surface is numbered 11; the object-side surface of the sixth lens is numbered 11, and the image-side surface is numbered 12; the object-side surface of the sixth lens is numbered 13, and the image-side surface is numbered 14; ND is the refractive index of the lens, and VD is the dispersion coefficient of the lens. The fifth lens and the sixth lens are glued together; The units for radius of curvature and thickness are millimeters (mm).

2. The vehicle-mounted lens as described in claim 1, characterized in that, The vehicle-mounted lens also includes a first filter, which is disposed between the third lens and the fourth lens.

3. The vehicle-mounted lens as described in claim 1, characterized in that, The object-side surface of the first lens is convex, and the image-side surface is concave. The object-side surface of the second lens is concave, and the image-side surface is convex. The object-side surface of the third lens is convex, and the image-side surface is also convex. The object-side surface of the fourth lens is convex, and the image-side surface is also convex. The object-side surface of the fifth lens is concave, and the image-side surface is also concave. The object-side surface of the sixth lens is convex, and the image-side surface is also convex. The object-side surface of the seventh lens is convex, and the image-side surface is concave.

4. The vehicle-mounted lens as described in claim 3, characterized in that, The first lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all glass spherical lenses; Both the second lens and the seventh lens are plastic aspherical lenses.

5. The vehicle-mounted lens as described in claim 1, characterized in that, The vehicle-mounted lens also includes a second filter, which is disposed between the seventh lens and the image plane.

Images