Vehicle-mounted around-view camera and lens clamping device

Abstract

The invention relates to the technical field of camera equipment, in particular to a vehicle-mounted around-view camera which comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. The first lens is a meniscus negative lens, the second lens is a negative lens, the third lens has positive focal power, the fourth lens is a biconvex positive lens, the fifth lens is a biconcave negative lens, and the sixth lens is a biconvex positive lens. According to the invention, the imaging efficiency of the vehicle-mounted around-view camera in the use process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of camera equipment, and in particular to a vehicle-mounted surround-view camera and a lens clamping device. Background Art

[0002] With the rapid development of intelligent connected vehicles and autonomous driving technologies, market demand for automotive surround-view cameras, a key component of intelligent assisted driving systems, continues to grow. To address the challenge of maintaining stable imaging capabilities in harsh weather and environments with large temperature fluctuations, innovative solutions are being developed. For example, waterproof layers and sealing rings are designed to prevent water mist, ensuring excellent imaging in all environments.

[0003] These lenses achieve ultra-wide angles, high resolutions, and excellent temperature characteristics through carefully designed optical systems. They have a maximum field of view exceeding 210°, an effective field of view exceeding 200°, and optimized primary and higher-order aberrations, resulting in excellent overall optical performance. Lens design must not only feature high image quality and a wide field of view, but also be small and low-cost, able to meet operating requirements in ambient temperatures ranging from -40°C to 105°C. As domestic companies have made significant progress in the fields of lenses and modules, gradually breaking the market monopoly of foreign manufacturers, and the trend of domestic substitution is evident, automotive surround-view lenses are required to improve image quality, expand field of view, enhance environmental adaptability, reduce costs, and promote domestic substitution to meet the needs of the development of intelligent connected vehicles and autonomous driving technologies. Summary of the Invention

[0004] In order to improve the convenience of operating a vehicle-mounted surround-view camera, the present application provides a vehicle-mounted surround-view camera.

[0005] This application provides a vehicle-mounted surround-view camera, which adopts the following technical solutions: A vehicle-mounted surround-view camera includes a first lens, a second lens, a third lens, an aperture, a fourth lens, a fifth lens, and a sixth lens, which are arranged in sequence from left to right along an incident light path; the first lens is a negative meniscus lens, the second lens is a negative lens, the third lens has positive focal power, the fourth lens is a biconvex positive lens, the fifth lens is a biconcave negative lens, and the sixth lens is a biconvex positive lens.

[0006] In a specific implementation manner, the first lens and the third lens are glass lenses, and the second lens, the fourth lens, the fifth lens, and the sixth lens are plastic lenses.

[0007] In a specific possible implementation manner, the fifth lens and the sixth lens are cemented together to form a cemented lens group.

[0008] In a specific embodiment, the focal length of the optical system is set to f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are f1, f2, f3, f4, f5, and f6, respectively, where f1, f2, f3, f4, f5, and f6 satisfy the following ratio with f: -5 <f1 / f<-3,-3<f2 / f<-1,2<f3 / f<4,2<f4 / f<4,-2<f5 / f<0,1<f6 / f<3。

[0009] In a specific embodiment, N d is the refractive index, V d is the Abbe constant, and the first lens satisfies the relationship: 1.5≤N d ≤1.9,V d ≤60; the second lens satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the third lens satisfies the relationship: 1.5≤N d ≤1.9, V d ≤55; the fourth lens satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the fifth lens satisfies the relationship: 1.4≤N d ≤1.8,V d ≤55; the sixth lens satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65.

[0010] In a specific embodiment, the second lens, the fourth lens, the fifth lens, and the sixth lens are aspherical lenses; the aspherical curve equation of the aspherical lens is expressed as: Z is the height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the cone constant; α1, α2, α3, α4, α5, α6, α7, and α8 are all high-order coefficients.

[0011] A lens clamping device includes a base, on which a toothed disc, a first gear and a second gear are rotatably mounted, the first gear and the second gear are meshed with the toothed disc, the second gear is threadedly connected to a screw, the screw is mounted on a lifting disc, the lifting disc is mounted with a positioning ring for positioning the lens, a guide rod is mounted on the lifting disc, a movable block is slidably mounted on the guide rod, a connecting rod is hinged on the movable block, the connecting rod is hinged to the base at one end away from the movable block, and a chuck for clamping and fixing the lens is mounted on the movable block.

[0012] By adopting the above technical solution, when the first, second, third, fourth, fifth, and sixth lenses exhibit any abnormality and require inspection, the lenses are removed and placed on the positioning ring of the lifting plate. The first gear is then rotated to control the screw to move up and down. The screw drives the lifting plate up and down, facilitating the rapid adjustment of the height of the lifting plate to change the distance between the lens and the operator, making it easier for the operator to inspect the lens and also enabling the rapid adjustment of the distance between the lens and the light source. When the lifting plate moves upward, the connecting rod pulls the movable block to slide on the guide rod, controlling the movable block and the chuck to center and clamp the lens, thereby enhancing the stability of the lens and preventing the lens from moving when the operator wipes or handles the lens.

[0013] In a specific possible implementation scheme, a telescopic sleeve is installed on the movable block, a telescopic rod is slidably installed on the telescopic sleeve, the chuck is installed on the telescopic rod, a spring is sleeved on the telescopic rod, one end of the spring is connected to the chuck, and the other end is connected to the telescopic sleeve.

[0014] By adopting the above technical solution, the chuck is made into a movable chuck, and the spring provides elastic force so that the chuck can elastically clamp the lens to prevent the chuck from damaging the lens.

[0015] In a specific embodiment, a concave arc surface is provided on a side of the clamping head away from the movable block.

[0016] By adopting the above technical solution, the clamp is set to an arc-shaped surface, which makes it easier for the clamp to fit the lens and increases the stability of clamping.

[0017] In a specific embodiment, a gasket is installed on a side of the clamp away from the movable block.

[0018] By adopting the above technical solution, adding a gasket can enhance the protection of the lens and prevent damage to the lens.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. Ultra-wide-angle field of view: The vehicle-mounted surround-view lens of this invention has a maximum field of view exceeding 210°, with an effective field of view exceeding 200°, capable of covering a wider area. This feature enables the lens to provide a more comprehensive field of view in the vehicle-mounted surround-view system, helping the driver better perceive the surrounding environment and improving driving safety and convenience.

[0020] 2. Large Aperture Design: While common ultra-wide-angle lenses have an aperture of F2.0 or higher, this lens has an aperture of F1.9. The advantages are as follows: Enhanced Luminous Flux: The large aperture design captures more light and enhances image brightness. This allows the lens to provide clear images even in low-light conditions, improving the imaging quality of vehicle-mounted surround-view cameras at night or in low-light environments.

[0021] Improve detail resolution: The large aperture design not only increases image brightness, but also improves detail resolution, making the image clearer.

[0022] 3. A rational combination of materials and structure: A combination of glass and plastic lenses: The first and third lenses are high-refractive-index glass lenses, while the second, fourth, fifth, and sixth lenses are plastic lenses. This material combination precisely corrects for axial chromatic aberration, vertical chromatic aberration, and higher-order chromatic aberration. While maintaining optical performance, it reduces material costs and enhances the product's market competitiveness. The lightness of the plastic lenses also helps reduce the overall weight of the lens. Cemented Lens Design: The fifth and sixth lenses are cemented together to form a cemented lens. This anomalous cementation not only corrects common axial and vertical chromatic aberrations, but also corrects more advanced chromatic aberrations, such as secondary spectral aberrations. This is particularly important for optical systems requiring high-precision imaging, significantly improving image quality and preventing color distortion and blur when capturing high-contrast or colorful scenes.

[0023] 4. Low-ghosting design: The optical system of this invention uses optical software to simulate and analyze the optical path of stray light and ghosting, and then precisely adjusts the shape, size, and position of key components such as optical lenses, as well as the curvature and tilt angle of optical surfaces, to achieve a ghosting intensity of better than 100dB. By adjusting these parameters, unintended focal points in the imaging optical path caused by reflections from optical component surfaces, as well as virtual image focal points formed by multiple reflections in the ghosting optical path, are effectively eliminated. This significantly reduces the impact of ghosting on image quality and improves the overall performance of the optical system.

[0024] Specialized optical coatings, such as anti-reflection and anti-reflection coatings, applied to optical components can reduce light reflection and stray light. Optical coatings also increase light transmittance and enhance image quality. Blackening the edges of lenses further absorbs scattered light, effectively controlling stray light and ghosting.

[0025] Properly placing an aperture in an optical system can effectively block non-imaging light from entering the system, reducing the interference of stray light. The aperture can precisely control the incident angle and aperture of light, thereby reducing the generation of ghosting and stray light, and optimizing image quality.

[0026] 1. Low Tolerance Sensitivity and High Manufacturability: This invention precisely optimizes the surface incident angle of optical components, controlling the incident angle to less than 45 degrees. By simplifying the optical system using aspheric surfaces, the optical system's sensitivity to machining tolerances, assembly tolerances, and environmental tolerances is reduced, resulting in the optical system's low error sensitivity, relaxed tolerance requirements, and improved resistance to error-induced image quality degradation. Furthermore, these relaxed tolerance requirements make the optical system easier to mass-produce, reducing manufacturing costs and time, and effectively improving the optical system's manufacturability.

[0027] 2. Good thermal performance stability: The lens design of the present invention effectively solves the problems of poor high and low temperature resolution and focus drift caused by the glass and plastic mixed design in the prior art by rationally matching glass and plastic aspherical lenses, and adopting a specific optical power distribution and an optical system composed of lenses with specific materials and structural shapes. The key lenses use materials with a relatively large thermal expansion coefficient (TCE) for thermal drift stability design. This design can maintain the stability of the defocus curve and meet the resolution requirements within a wide temperature range, showing good thermal stability, thereby significantly enhancing the reliability and applicability of the lens under various climatic conditions. Appendix Figures 8 to 13 The defocus curves and MTF vs Field curves at different temperatures are displayed, further verifying its stable imaging performance in high and low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the arrangement of lenses in the vehicle-mounted surround-view camera according to an embodiment of the present application.

[0029] Figure 2 1 is an axial chromatic aberration curve diagram of an embodiment of the present application.

[0030] Figure 3 2 is a vertical axis chromatic aberration curve diagram of an embodiment of the present application.

[0031] Figure 4 4 is a field curvature distortion curve diagram of an embodiment of the present application.

[0032] Figure 5 It is a relative brightness diagram of an embodiment of the present application.

[0033] Figure 6 This is a diagram of the chief ray angle (Chief Ray Angle) of an embodiment of the present application.

[0034] Figure 7 : is an MTF curve diagram of an embodiment of the present application.

[0035] Figure 8 This is a 100 lp / mm defocus curve at 25°C according to an embodiment of the present application.

[0036] Figure 9 This is a 100lp / mm defocus curve at -40°C of an embodiment of the present application.

[0037] Figure 10 This is a 100 lp / mm defocus curve at 105°C according to an embodiment of the present application.

[0038] Figure 11 This is a graph of 100 lp / mm MTF vs Field at 25°C according to an embodiment of the present application.

[0039] Figure 12 This is a graph of 100 lp / mm MTF vs Field at -40°C according to an embodiment of the present application.

[0040] Figure 13 This is a graph of 100 lp / mm MTF vs Field at 105°C according to an embodiment of the present application.

[0041] Figure 14 Schematic diagram of a lens holding device according to an embodiment of the present application.

[0042] Figure 15 It is a cross-sectional view of the lifting plate of an embodiment of the present application.

[0043] Figure 16 Schematic diagram of a chuck according to an embodiment of the present application.

[0044] Figure numerals: 11, first lens; 12, second lens; 13, third lens; 14, fourth lens; 15, fifth lens; 16, sixth lens; 17, first equivalent glass plate; 18, second equivalent glass plate; 2, aperture; 3, imaging surface; 4, base; 41, gear plate; 42, first gear; 421, handle; 43, second gear; 44, screw; 45, lifting plate; 451, slide groove; 46, positioning ring; 461, guide rod; 462, movable block; 463, connecting rod; 464, telescopic sleeve; 465, telescopic rod; 466, chuck; 467, spring; 468, gasket; 47, light source. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-16 This application is described in further detail.

[0046] The present application discloses a vehicle-mounted surround view camera, referring to Figure 1, comprising, arranged from left to right along the incident light path, a first lens 11, a second lens 12, a third lens 13, an aperture 2, a fourth lens 14, a fifth lens 15, and a sixth lens 16. The first lens 11 is a negative meniscus lens, the second lens 12 is a negative lens, the third lens 13 has positive focal power, the fourth lens 14 is a biconvex positive lens, the fifth lens 15 is a biconcave negative lens, and the sixth lens 16 is a biconvex positive lens. A first equivalent glass plate 17 and a second equivalent glass plate 18 are sequentially arranged on the side of the sixth lens 16 away from the fifth lens 15. The first equivalent glass plate 17 is a color filter, the second equivalent glass plate 18 is a protective glass plate, and the side of the second equivalent glass plate 18 away from the first equivalent glass plate 17 forms the imaging surface 3.

[0047] The first lens 11 and the third lens 13 are glass lenses, and the second lens 12 , the fourth lens 14 , the fifth lens 15 and the sixth lens 16 are plastic lenses.

[0048] The fifth lens 15 and the sixth lens 16 are cemented together to form a cemented lens group.

[0049] In the embodiment of the present invention, the focal length of the optical system is set to f, and the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are f1, f2, f3, f4, f5, and f6, respectively, where f1, f2, f3, f4, f5, and f6 satisfy the following ratio with f: -5 <f1 / f<-3,-3<f2 / f<-1,2<f3 / f<4,2<f4 / f<4,-2<f5 / f<0,1<f6 / f<3。

[0050] In the embodiment of the present invention, N d is the refractive index, V d is the Abbe constant, and the first lens 11 satisfies the relationship: 1.5≤N d ≤1.9,V d ≤60; the second lens 12 satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the third lens 13 satisfies the relationship: 1.5≤N d ≤1.9, V d ≤55; the fourth lens 14 satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the fifth lens 15 satisfies the relationship: 1.4≤N d ≤1.8,V d ≤55; the sixth lens 16 satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65.

[0051] In the embodiment of the present invention, the second lens 12, the fourth lens 14, the fifth lens 15 and the sixth lens 16 are aspherical lenses; the aspherical curve equation is expressed as: In the embodiment of the present invention, Z is the height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the cone constant; α1, α2, α3, α4, α5, α6, α7, and α8 are all high-order coefficients.

[0052] The total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL / f≤12.

[0053] The F number of the optical system is ≤2.0.

[0054] The half-image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH / f≥1.5.

[0055] In this embodiment, light rays are formed from left to right through the first lens 11, the second lens 12, the third lens 13, the aperture 2, the fourth lens 14, the fifth lens 15, and the sixth lens 16, and the following conditions are met: (1) Focal length: 1.2 ≤ EFFL ≤ 1.8 mm; (2) Aperture F≤2.0; (3) Field of view: 2w ≥ 200° To achieve the above design parameters, the specific design adopted by the optical system of this embodiment is shown in the following table: The aspheric coefficients of the aspheric lenses of the optical system of this embodiment are as follows: The optical system satisfies the requirements of small size and low cost while meeting the requirements of lens imaging performance by rationally allocating the material, optical focal length, surface shape, center thickness of each lens, and axial distance between lenses.

[0056] The axial chromatic aberration curve, vertical chromatic aberration curve, field curvature distortion curve, relative brightness diagram, chief ray angle diagram and MTF curve diagram of the optical lens are as follows: Figures 2 to 7 As shown. Figure 2 The offset of the axial aberration of the optical lens provided in this example is controlled within -0.02mm to 0.03mm, and the optical lens can better correct the axial aberration. Figure 3The vertical axis chromatic aberration of the longest wavelength and the shortest wavelength of the optical lens provided in this example is controlled within -1um to 10um. The optical lens can perfectly correct the chromatic aberration of the edge field of view and the secondary spectrum of the entire image plane. Figure 4 The field curvature of the optical lens provided in this example is within ±0.05mm at different wavelengths. The field curvature of the optical lens is effectively controlled, and the FTheta distortion of the optical lens is controlled within 1%. The distortion of the optical lens at each wavelength is well controlled, and a good linear relationship is obtained between the image height and the field angle. The image compression in the edge angle area is relatively smooth, which effectively improves the clarity of the expanded image. Figure 5 and Figure 6 The optical lens provided in this example has a full field of view relative brightness greater than 60% and a chief ray angle less than 16 degrees. The architecture of this optical lens is conducive to achieving high relative brightness and low chief ray angle, and can be well matched with the chip sensor, which is conducive to improving imaging quality. Figure 7 The MTF value of the optical lens provided in this example is above 0.3 in the entire field of view. In the range of 0 to 160 lp / mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, with good imaging quality and good detail resolution. Figures 8 to 13 The defocus curves and MTF vs Field curves of the optical lens provided in this example at different temperatures verify its stable imaging performance in high and low temperature environments.

[0057] The present application also provides a lens holding device, referring to Figure 14 、 Figure 15 and Figure 16, including a base 4, on which a toothed disc 41, a first gear 42, and a second gear 43 are rotatably mounted. The first gear 42 and the second gear 43 are both meshed and connected to the toothed disc 41. A rotating handle 421 is fixedly connected to the first gear 42. A screw 44 is threadedly connected to the second gear 43. The screw 44 is coaxially arranged with the second gear 43 and passes through the second gear 43. A lifting plate 45 is fixedly mounted on the end of the screw 44 away from the base 4. A positioning ring 46 for positioning the lens is fixedly mounted on the lifting plate 45. The positioning ring 46 is set at the exact center of the lifting plate 45 and is made of rubber. A light source 47 is fixedly mounted on the base 4 to illuminate the positioning ring 46. A slide groove 451 is provided on the lifting plate 45, and a guide rod 461 is fixedly installed on the lifting plate 45, and the guide rod 461 is arranged in the slide groove 451. A movable block 462 is slidably installed on the guide rod 461, and a connecting rod 463 is hinged on the bottom surface of the movable block 462, and the end of the connecting rod 463 away from the movable block 462 is hinged to the base 4; a telescopic sleeve 464 is fixedly installed on the movable block 462, and a telescopic rod 465 is slidably installed on the telescopic sleeve 464, and the telescopic rod 465 can be retracted in the telescopic sleeve 464, and a chuck 466 is fixedly installed on the end of the telescopic rod 465 away from the movable block 462, and a spring 467 is sleeved on the telescopic rod 465, one end of the spring 467 is fixedly connected to the chuck 466, and the other end is fixedly connected to the telescopic sleeve 464. One end of the clamp 466 away from the telescopic rod 465 is set as a concave arc plate, and a gasket 468 is fixedly installed on the concave arc surface of the clamp 466. The gasket 468 is a soft rubber gasket. In this embodiment, a total of three groups of clamps 466 are set to clamp the lens.

[0058] When the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 have any abnormalities and need to be inspected, the lenses are removed and placed on the positioning ring 46 of the lifting plate 45. The positioning ring 46 is made of rubber material, which can not only reduce the wear and tear on the lenses and prevent scratches on the lenses, but also increase the friction between the lenses and the positioning ring 46 to prevent the lenses from slipping on the positioning ring 46. The handle 421 is rotated to control the rotation of the first gear 42, the first gear 42 drives the gear plate 41 to rotate, and the gear plate 41 drives the second gear 43 to rotate. When the second gear 43 rotates, the screw 44 is controlled to move up and down, and the screw 44 drives the lifting plate 45 up and down. This facilitates the rapid adjustment of the height of the lifting plate 45 to change the distance between the lens and the operator, making it easier for the operator to inspect the lens, and also allows the rapid adjustment of the distance between the lens and the light source 47.

[0059] When the lifting plate 45 moves upward, the connecting rod 463 pulls the movable block 462 to slide on the guide rod 461, controlling the movable block 462 to slide close to the positioning ring 46. The movable block 462 drives the clamp 466 to center and clamp the lens. The spring 467 provides elastic force to elastically clamp the lens, thereby enhancing the stability of the lens and preventing the lens from moving when the operator wipes or handles the lens.

[0060] The working principle of the embodiment of the present application is as follows: light enters the first lens 11, the second lens 12, the third lens 13, the aperture 2, the fourth lens 14, the fifth lens 15, the sixth lens 16, and the first equivalent glass plate 17 disposed behind the sixth lens 16 from left to right, and then forms an image on the imaging surface 3. When the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 have any abnormalities and need to be inspected, the lens is removed and placed on the positioning ring 46 of the lifting plate 45. The handle 421 is rotated to control the rotation of the first gear 42. The first gear 42 drives the gear plate 41 to rotate, and the gear plate 41 drives the second gear 43 to rotate. The rotation of the second gear 43 controls the vertical movement of the screw 44, which drives the lifting plate 45 up and down. The screw 44 facilitates the vertical movement of the lifting plate 45, facilitating the rapid adjustment of the height of the lifting plate 45 to change the distance between the lens and the operator, making it easier for the operator to inspect the lens and also allowing the rapid adjustment of the distance between the lens and the light source 47.

[0061] When the lifting plate 45 moves upward, the connecting rod 463 pulls the movable block 462 to slide on the guide rod 461, controlling the movable block 462 to slide close to the positioning ring 46. The movable block 462 drives the clamp 466 to center and clamp the lens. The spring 467 provides elastic force to elastically clamp the lens, thereby enhancing the stability of the lens and preventing the lens from moving when the operator wipes or handles the lens.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle-mounted surround view camera, characterized in that: The invention comprises a first lens (11), a second lens (12), a third lens (13), an aperture (2), a fourth lens (14), a fifth lens (15) and a sixth lens (16) which are arranged in sequence from left to right along the incident light path of the light; the first lens (11) is a meniscus negative lens, the second lens (12) is a negative lens, the third lens (13) has positive focal power, the fourth lens (14) is a biconvex positive lens, the fifth lens (15) is a biconcave negative lens, and the sixth lens (16) is a biconvex positive lens.

2. The vehicle-mounted surround view camera according to claim 1, characterized in that: The first lens (11) and the third lens (13) are glass lenses, and the second lens (12), the fourth lens (14), the fifth lens (15), and the sixth lens (16) are plastic lenses.

3. The vehicle-mounted surround view camera according to claim 2, characterized in that: The fifth lens (15) and the sixth lens (16) are glued together to form a glued lens group.

4. The vehicle-mounted surround view camera according to claim 1, characterized in that: Assuming the focal length of the optical system is f, the focal lengths of the first lens (11), the second lens (12), the third lens (13), the fourth lens (14), the fifth lens (15), and the sixth lens (16) are f1, f2, f3, f4, f5, and f6, respectively, wherein f1, f2, f3, f4, f5, and f6 satisfy the following ratio with f: -5 <f1 / f<-3,-3<f2 / f<-1,2<f3 / f<4,2<f4 / f<4,-2<f5 / f<0,1<f6 / f<3。 5. The vehicle-mounted surround view camera according to claim 1, characterized in that: N d is the refractive index, V d is the Abbe constant, and the first lens (11) satisfies the relationship: 1.5≤N d ≤1.9,V d ≤60; the second lens (12) satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the third lens (13) satisfies the relationship: 1.5≤N d ≤1.9, V d ≤55; the fourth lens (14) satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65; the fifth lens (15) satisfies the relationship: 1.4≤N d ≤1.8,V d ≤55; the sixth lens (16) satisfies the relationship: 1.4≤N d ≤1.8, V d ≤65.

6. The vehicle-mounted surround view camera according to claim 1, characterized in that: The second lens (12), the fourth lens (14), the fifth lens (15) and the sixth lens (16) are aspheric lenses; the aspheric curve equation of the aspheric lens is expressed as: Z is the height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the cone constant; α1, α2, α3, α4, α5, α6, α7, and α8 are all high-order coefficients.

7. A lens clamping device for clamping a lens of a vehicle-mounted surround view camera according to claims 1-6, characterized in that: The invention comprises a base (4), a toothed disc (41), a first gear (42) and a second gear (43) being rotatably mounted on the base (4), the first gear (42) and the second gear (43) being meshed with the toothed disc (41), a screw rod (44) being threadedly connected to the second gear (43), a lifting disc (45) being mounted on the screw rod (44), a positioning ring (46) for positioning the lens being mounted on the lifting disc (45), a guide rod (461) being mounted on the guide rod (461), a movable block (462) being slidably mounted on the movable block (462), a connecting rod (463) being hinged to the base (4), an end of the connecting rod (463) away from the movable block (462) being hinged to the base (4), and a chuck (466) for clamping and fixing the lens being mounted on the movable block (462).

8. The lens holding device according to claim 7, characterized in that: A telescopic sleeve (464) is installed on the movable block (462), a telescopic rod (465) is slidably installed on the telescopic sleeve (464), the chuck (466) is installed on the telescopic rod (465), a spring (467) is sleeved on the telescopic rod (465), one end of the spring (467) is connected to the chuck (466), and the other end is connected to the telescopic sleeve (464).

9. The lens holding device according to claim 7, characterized in that: A concave arc surface is provided on a side of the clamping head (466) away from the movable block (462).

10. The lens holding device according to claim 7, characterized in that: A gasket (468) is installed on the side of the clamp (466) away from the movable block (462).

Images