A vehicle-mounted MOS imaging lens and an inspection platform for inspecting the lens

Abstract

The application relates to the technical field of vehicle-mounted imaging equipment, in particular to a vehicle-mounted MOS imaging lens and an inspection platform for inspecting the lens, which comprises an optical system, the optical system is sequentially arranged from an object side to an image side along an optical path of light incidence and is sequentially arranged as a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens; the first lens is a meniscus concave negative lens, the second lens is a concave-convex positive lens, the third lens is a double-convex positive lens, the fourth lens is a concave-convex negative lens, the fifth lens is a double-convex positive lens, the sixth lens is a meniscus convex negative lens, the fourth lens and the fifth lens form a cemented lens group; the second lens, the fourth lens, the fifth lens and the sixth lens are plastic aspheric lenses. The application has the effect of improving the efficiency of the vehicle-mounted MOS imaging lens and the inspection platform for inspecting the lens in the use process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted imaging equipment, in particular to a vehicle-mounted MOS imaging lens and an inspection platform for inspecting the lens. BACKGROUND

[0002] The intelligent cabin, also known as an intelligent automobile occupant monitoring system (OMS), is designed based on the dual concerns of driving safety and the safety and comfort experience of passengers in the vehicle. While ensuring driving safety, the intelligent cabin is also committed to improving the passenger's experience of using the vehicle. It replaces the traditional complex mechanical button control mode with advanced computer vision-based human-computer interaction technology. In this system, the passenger only needs to make a simple gesture, and the sensor of the intelligent cabin can recognize and understand the passenger's intention, and then automatically activate the corresponding function, greatly enriching and optimizing the passenger's experience of using the vehicle.

[0003] In order to adapt to complex driving environments and vehicle-mounted optical monitoring systems, vehicle-mounted optical inspection systems, also known as OMS, require a large field of view and high optical performance, such as high resolution. The commonly used lens is a full-glass structure. Although this structure can provide good optical performance, it is often too large in size, which is not conducive to the integration of the system and also increases the cost. Therefore, in order to meet the market demand for small-size and low-cost OMS lenses, new lens technology needs to be developed to reduce the size and cost while maintaining optical performance, and an infrared confocal design is needed to achieve high-definition imaging at night. SUMMARY

[0004] In order to improve the convenience of the vehicle-mounted MOS imaging lens and the inspection platform for inspecting the lens during operation, the present application provides a vehicle-mounted MOS imaging lens and an inspection platform for inspecting the lens.

[0005] The present application provides a vehicle-mounted MOS imaging lens, which adopts the following technical solution:

[0006] A vehicle-mounted MOS imaging lens, comprising an optical system, the optical system is sequentially arranged from the object side to the image side along the light incident path as a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens; the first lens is a meniscus concave negative lens, the second lens is a concave-convex positive lens, the third lens is a double-convex positive lens, the fourth lens is a concave-convex negative lens, the fifth lens is a double-convex positive lens, and the sixth lens is a meniscus convex negative lens; the fourth lens and the fifth lens form a cemented lens group; the second lens, the fourth lens, the fifth lens and the sixth lens are plastic aspherical lenses.

[0007] In one specific embodiment, the object side surface of the first lens is planar, 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 convex; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is convex; and the object side surface of the sixth lens is convex, and the image side surface is concave.

[0008] In one specific embodiment, the first lens and the third lens are both glass spherical lenses, and the second lens, the fourth lens, the fifth lens and the sixth lens are plastic aspherical lenses.

[0009] In one specific embodiment, the air gap between the first lens and the second lens is 1.8 to 2.2 mm; the air gap between the second lens and the stop is 0.0 to 0.3 mm; the air gap between the stop and the third lens is 0.0 to 0.3 mm; the air gap between the third lens and the fourth lens is 0.0 to 0.6 mm; and the air gap between the fifth lens and the sixth lens is 0.2 to 1.0 mm.

[0010] In one specific embodiment, the focal length of the optical system is 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, in order, wherein f1, f2, f3, f4, f5 and f6 satisfy the following ratios with respect to f: -2 < f1 / f < -1; 5 < f2 / f < 8; 1 < f3 / f < 2; -2 < f4 / f < -1; 1 < f5 / f < 2; and -9 < f6 / f < -7.

[0011] In one specific embodiment, N d is the refractive index, and V d is the Abbe number, wherein the refractive index and the Abbe number of the first lens satisfy the following relationships: 1.4 ≤ N d ≤ 1.7, and V d ≥ 55; the refractive index and the Abbe number of the second lens satisfy the following relationships: 1.5 ≤ N d ≤ 1.8, and V d ≤ 60; the refractive index and the Abbe number of the third lens satisfy the following relationships: 1.4 ≤ N d ≤ 1.8, and V d ≥ 55; the refractive index and the Abbe number of the fourth lens satisfy the following relationships: 1.4 ≤ N d ≤ 1.8, and V d ≤ 60; and the refractive index and the Abbe number of the fifth lens satisfy the following relationships: 1.4 ≤ N d ≤ 1.6, and Vd ≥50; the Abbe number of the sixth lens satisfies the relationship: 1.5≤N d ≤1.8, V d ≤60.

[0012] In one specific embodiment, the aspherical surface curve equation of the aspherical lens is:

[0013]

[0014] wherein Z is the sagittal height of the aspherical surface at a height h along the optical axis from the vertex of the aspherical surface, c is the paraxial curvature of the aspherical surface, k is the conic constant, and a1, a2, a3, a4, a5, a6, a7, and a8 are high-order term coefficients.

[0015] In one specific embodiment, the total optical length TTL of the optical system satisfies the relationship: TTL / f≤5, and the F number of the optical system satisfies the relationship: F≤2.4.

[0016] In one specific embodiment, the image height H of the optical system satisfies the relationship: H / f≥1.0.

[0017] In one specific embodiment, a base plate is provided, a fixed column is mounted on the base plate, a first rotating drum is rotatably mounted on the fixed column, and a first gear is mounted on the first rotating drum; a first mounting column is mounted on the base plate, a second rotating drum is mounted on the first mounting column, a second gear is mounted on the second rotating drum, the second gear is in meshing connection with the first gear, a first support is mounted on the first rotating drum, a first swing arm is hingedly connected to the first support, and a loading disc is rotatably mounted on the first swing arm; a third rotating drum is rotatably mounted on the first rotating drum, a third gear is mounted on the third rotating drum, a second mounting column is mounted on the base plate, a fourth gear is rotatably mounted on the second mounting column, and the fourth gear is in meshing connection with the third gear; a second support is mounted on the third rotating drum, a second swing arm is hingedly connected to the second support, and the second swing arm is hingedly connected to the loading disc; a fifth rotating drum is rotatably mounted on the third rotating drum, a fifth gear is mounted on the fifth rotating drum, a third mounting column is mounted on the base plate, a sixth rotating drum is mounted on the third mounting column, a sixth gear is mounted on the sixth rotating drum, and the sixth gear is in meshing connection with the fifth gear; a third support is mounted on the fifth rotating drum, a third swing arm is hingedly connected to the third support, and the third swing arm is in rotatable connection with the loading disc.

[0018] By adopting the above technical scheme, the lens is placed on the carrier disc, the first gear is controlled to rotate by rotating the second gear, the first gear drives the first support to rotate, the first support pulls the first swing arm to swing, the first swing arm pulls the carrier disc to tilt, the tilt angle of the lens is quickly adjusted, and the operator can conveniently inspect the lens; the second swing arm is controlled to swing by rotating the third gear, and the third swing arm is controlled to swing by rotating the fifth gear, so that the carrier disc is quickly tilted in multiple directions, and the operator can conveniently inspect the lens from different angles, so that the lens is quickly inspected and maintained, the carrier disc with the rotatable tilt angle supports the lens, the risk of lens falling is avoided, factors of scratching the lens are reduced, and the efficiency during lens inspection is improved.

[0019] In one specific implementation, the carrier disc is provided with a mounting groove, the carrier disc is provided with a receiving groove, the receiving groove is in communication with the mounting groove, the carrier disc is provided with a fixing assembly for fixing the lens, the fixing assembly comprises a fixing block, the fixing block is slidingly installed on the carrier disc, the fixing block is arranged in the receiving groove, a first lead screw is rotatably installed on the fixing block, the first lead screw is threadedly connected with the carrier disc, a supporting rod is installed on the fixing block, a second lead screw is threadedly connected with the supporting rod, the second lead screw is vertically arranged, and a lens pressing plate is rotatably installed at the bottom end of the second lead screw.

[0020] By adopting the above technical scheme, the first lead screw is controlled to rotate to control the fixing block to move and press the lens, and the second lead screw is controlled to press the lens by the lens pressing plate, so that the lens can be quickly fixed, the stability of the lens during inspection is enhanced, and the lens is prevented from falling out of the carrier disc.

[0021] In summary, the present application has at least one of the following beneficial technical effects:

[0022] 1. The lens design of the present application achieves an imaging angle of more than 172 degrees, which significantly expands the monitoring field of view, making the monitoring of passengers in the vehicle more comprehensive, thereby significantly improving safety and monitoring efficiency.

[0023] 2. The lens design has excellent stability and can maintain image clarity under different temperature conditions, which ensures that high-quality images can be provided even under different environmental temperature conditions, enhancing the reliability of the monitoring system.

[0024] 3. Through the optical lens matching, the lens design of the present application controls the aspheric coefficient term to be within eight terms, reducing the tolerance sensitivity. This not only simplifies the assembly process, but also improves production efficiency and product consistency, suitable for large-scale production.

[0025] 4. The application adopts a combination design of two glass lenses and four plastic lenses, which reduces material costs and enhances market competitiveness of the product without sacrificing optical performance.

[0026] 5. The lens design effectively compensates for focal plane displacement under different temperature environments through reasonable matching of glass and plastic aspheric lenses, showing good thermal stability and ensuring good imaging performance under different temperature environments.

[0027] 6. The application precisely corrects axial chromatic aberration, vertical chromatic aberration and high-order chromatic aberration, ensuring high imaging quality even at large angles, which is crucial for improving the accuracy and reliability of image analysis.

[0028] 7. The day and night confocal lens of the application can maintain the consistency of the focal point when switching the spectrum, ensuring that the image remains clear under both daylight and infrared light, which is particularly important for all-weather monitoring systems.

[0029] 8. The infrared waveband spectrum of the application is 940nm, which has strong anti-interference ability and penetration, and can penetrate obstacles such as smoke and dust, having unique advantages in monitoring and other fields, especially in low-visibility conditions. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of a vehicle-mounted MOS imaging lens of an embodiment of the application.

[0031] Figure 2 is an axial chromatic aberration curve of an embodiment of the application.

[0032] Figure 3 is a vertical chromatic aberration curve of an embodiment of the application.

[0033] Figure 4 is a field curvature distortion curve of an embodiment of the application.

[0034] Figure 5 is a relative luminance diagram of an embodiment of the application.

[0035] Figure 6 is a chief ray angle diagram of an embodiment of the application.

[0036] Figure 7 is an MTF infrared light curve of an embodiment of the application.

[0037] Figure 8 is an MTF visible light curve of an embodiment of the application.

[0038] Figure 9 is a schematic diagram of an inspection table of an embodiment of the application.

[0039] Figure 10 is a sectional view of the fixed column 32 of the embodiment of the present application.

[0040] Figure 11 is a schematic view of the installation position relationship of the fifth and sixth gears embodying the embodiment of the present application.

[0041] Figure 12 is a schematic view of the fixed assembly of the embodiment of the present application.

[0042] Reference signs: 11, first lens; 12, second lens; 13, diaphragm; 14, third lens; 15, fourth lens; 16, fifth lens; 17, sixth lens; 18, first equivalent glass flat plate; 2, image plane; 31, bottom plate; 32, fixed column; 331, first rotating drum; 332, first gear; 333, first mounting column; 334, second rotating drum; 335, second gear; 336, first handle; 337, first support; 338, first swing arm; 341, third rotating drum; 342, third gear; 343, second mounting column; 344, fourth rotating drum; 345, fourth gear; 346, second handle; 347, second support; 348, second swing arm; 351, rotating drum; 352, fifth gear; 353, third mounting column; 354, sixth rotating drum; 355, sixth gear; 356, third handle; 357, third support; 358, third swing arm; 4, carrier plate; 41, mounting groove; 42, receiving groove; 431, fixed block; 432, first screw rod; 433, support rod; 434, second screw rod; 435, pressing plate. DETAILED DESCRIPTION

[0043] The following will be described in detail in combination with the accompanying drawings. Figures 1-12 The present application will be further described in detail.

[0044] The embodiment of the present application discloses a vehicle-mounted MOS imaging lens, and refers to Figure 1 , which comprises an optical system, the optical system is sequentially provided with a first lens 11, a second lens 12, a diaphragm 13, a third lens 14, a fourth lens 15, a fifth lens 16 and a sixth lens 17 from a light incident path from an object side to an image side, Figure 1 The image plane is shown in FIG. 2. Without considering the reverse bending caused by the aspherical surface coefficient, the first lens 11 is a meniscus concave negative lens, the second lens 12 is a concave-convex positive lens, the third lens 14 is a double-convex positive lens, the fourth lens 15 is a concave-convex negative lens, the fifth lens 16 is a double-convex positive lens, and the sixth lens 17 is a meniscus convex negative lens, wherein the fourth lens 15 and the fifth lens 16 form a cemented lens group; the second lens 12, the fourth lens 15, the fifth lens 16 and the sixth lens 17 are aspherical lenses.

[0045] The object side of the first lens 11 is a plane, and the image side is a concave surface; the object side of the second lens 12 is a concave surface, and the image side is a convex surface; the object side of the third lens 14 is a convex surface, and the image side is a convex surface; the object side of the fourth lens 15 is a convex surface, and the image side is a concave surface; the object side of the fifth lens 16 is a convex surface, and the image side is a convex surface; and the object side of the sixth lens 17 is a convex surface, and the image side is a concave surface.

[0046] The first lens 11 and the third lens 14 are glass spherical lenses, and the second lens 12, the fourth lens 15, the fifth lens 16, and the sixth lens 17 are plastic aspherical lenses.

[0047] Since the first lens 11 and the second lens 12 are lenses with negative focal lengths, they can adjust large-angle light, and the plastic aspherical lenses can reduce the distortion of the optical system. Through reasonable lens matching, the optical system realizes super-wide-angle, large-aperture, day and night focus, and good correction of on-axis and off-axis aberrations, and has good imaging quality.

[0048] A first equivalent glass flat plate 18 is further arranged between the sixth lens 17 and the imaging surface, and an infrared band-pass cutoff film is coated on the side of the first equivalent glass flat plate 18 away from the sixth lens 17, which plays the role of a color filter.

[0049] The air gap between the first lens 11 and the second lens 12 is 1.8 mm to 2.2 mm; the air gap between the second lens 12 and the diaphragm 13 is 0.0 mm to 0.3 mm; the air gap between the diaphragm 13 and the third lens 14 is 0.0 mm to 0.3 mm; the air gap between the third lens 14 and the fourth lens 15 is 0.0 mm to 0.6 mm; and the air gap between the fifth lens 16 and the sixth lens 17 is 0.2 mm to 1.0 mm.

[0050] The focal length of the optical system is f, and the focal lengths of the first lens 11, the second lens 12, the third lens 14, the fourth lens 15, the fifth lens 16, and the sixth lens 17 are f1, f2, f3, f4, f5, and f6, respectively, which satisfy the following ratios: -2 < f1 / f < -1; 5 < f2 / f < 8; 1 < f3 / f < 2; -2 < f4 / f < -1; 1 < f5 / f < 2; and -9 < f6 / f < -7.

[0051] In this embodiment, N d is the refractive index, and V d is the Abbe number. The refractive index and the Abbe number of the first lens 11 satisfy the relationship: 1.4 ≤ N d ≤ 1.7, and V d ≥ 55; the refractive index and the Abbe number of the second lens 12 satisfy the relationship: 1.5 ≤ N d≤ 1.8, V d ≤ 60; the refractive index and Abbe number of the third lens 14 satisfy the relationship: 1.4 ≤ N d ≤ 1.8, V d ≥ 55; the refractive index and Abbe number of the fourth lens 15 satisfy the relationship: 1.4 ≤ N d ≤ 1.8, V d ≤ 60; the refractive index and Abbe number of the fifth lens 16 satisfy the relationship: 1.4 ≤ N d ≤ 1.6, V d ≥ 50; the refractive index and Abbe number of the sixth lens 17 satisfy the relationship: 1.5 ≤ N d ≤ 1.8, V d ≤ 60.

[0052] In this embodiment, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL / f ≤ 6.

[0053] In this embodiment, the image height H of the optical system and the focal length f of the optical system satisfy: H / f ≥ 1.0.

[0054] In this embodiment, the technical indicators achieved by the optical system are as follows:

[0055] (1) focal length: 2.5 ≤ EFFL ≤ 3.5 mm, note: EFFL refers to the effective focal length of the optical system;

[0056] (2) aperture F ≤ 2.4;

[0057] (3) field of view angle: 2w ≥ 172°;

[0058] (4) working waveband: visible light waveband and 940 nm waveband.

[0059] To achieve the above design parameters, the specific design of the optical system is shown in Table 1:

[0060]

[0061]

[0062] Table 1

[0063] In this embodiment, the aspherical surface curve equation expressions of the second lens 12, the fourth lens 15, the fifth lens 16, and the sixth lens 17 are as follows:

[0064]

[0065] Where Z is the distance from the vertex of the aspherical surface to the optical axis at a height of h; c is the paraxial curvature of the aspherical surface; k is the conic constant; and α1, α2, α3, α4, α5, α6, α7, and α8 are all higher-order coefficients.

[0066] In this embodiment, the aspherical coefficients of each aspherical lens in the optical system are shown in Table 2:

[0067]

[0068] Table 2

[0069] The optical system, by rationally allocating the materials, optical power, surface shape, center thickness of each lens, and on-axis distance between each lens, meets the requirements of lens imaging performance while also meeting the requirements of small size and low cost.

[0070] When the vehicle-mounted OMS lens is imaging, light enters from left to right through the first lens 11, the second lens 12, the aperture 13, the third lens 14, the fourth lens 15, the fifth lens 16, and the sixth lens 17, and then forms an image on the imaging surface after passing through the first equivalent glass plate 18.

[0071] In this example, the axial chromatic aberration curve, transverse chromatic aberration curve, field curvature distortion curve, relative brightness curve, principal ray angle curve, MTF infrared curve, and MTF visible light curve of the optical lens across its entire working wavelength range are shown in the following figures: Figures 2 to 8 As shown. Figure 2 The optical lens provided in this example uses a low-dispersion material for its first lens element to achieve good transverse chromatic aberration performance, with axial aberration shift within -0.015mm to 0.04mm. Figure 3 The third lens element of the optical lens provided in this example uses a low-dispersion material to correct axial chromatic aberration. The transverse chromatic aberration of the longest and shortest wavelengths is controlled within -1µm to 12µm, which can effectively correct chromatic aberration at the edge of the field of view and the second-order spectrum of the entire image plane. Figure 4 The optical lens provided in this embodiment effectively controls field curvature, with field curvature at different wavelengths within ±0.1mm. The F-Theta distortion of the optical lens is controlled within 25%, achieving good control over distortion at various wavelengths. A good linear relationship is achieved between image height and field of view, and image compression in edge angle regions is relatively smooth, effectively improving the clarity of the unfolded image. Figure 5 and Figure 6 The optical lens provided in this example has a relative brightness greater than 67% across the entire field of view and a principal ray angle of less than 20 degrees. The use of a forward-positioned aperture in the optical lens is beneficial for achieving high relative brightness and a low principal ray angle. Figure 7 and Figure 8The optical lens provided by the embodiment has infrared light MTF values of 0.35 or above and visible light MTF values of 0.4 or above in the full field of view; in the range of 0-160 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and the imaging quality and the detail resolution are good.

[0072] The above optical system is only an application example of the present application, but for those skilled in the art, it is completely feasible to design various different styles of vehicle-mounted OMS lenses according to the guidance of the present application, and it does not involve complex innovative work. Without deviating from the core principles and spirits of the present application, any equivalent changes, adjustments, replacements or improvements made according to the patent application scope of the present application should be considered as part of the present application.

[0073] The embodiment of the present application also discloses an inspection platform for the inspection lens, referring to Figure 9 、 Figure 10 、 Figure 11 and Figure 12 , comprising a bottom plate 31, a fixed column 32 is fixedly installed on the bottom plate 31, a first rotating drum 331 is rotatably installed on the fixed column 32, a first gear 332 is fixedly installed on the first rotating drum 331, a first mounting column 333 is fixedly installed on the bottom plate 31, a second rotating drum 334 is rotatably installed on the first mounting column 333, a second gear 335 is fixedly installed on the second rotating drum 334, the second gear 335 is meshingly connected with the first gear 332, and a first handle 336 is fixedly installed on the second rotating drum 334. A first support 337 is fixedly installed on the other end of the first rotating drum 331 away from the first gear 332, a first swing arm 338 is hingedly connected to the one end of the first support 337 away from the first rotating drum 331, and a loading disc 4 is rotatably installed on the one end of the first swing arm 338 away from the first support 337.

[0074] A third rotating drum 341 is rotatably installed on the first rotating drum 331, a third gear 342 is fixedly installed on the third rotating drum 341, the third gear 342 is arranged above the first gear 332, a second mounting column 343 is fixedly installed on the bottom plate 31, a fourth rotating drum 344 is rotatably installed on the second mounting column 343, a fourth gear 345 is fixedly installed on the fourth rotating drum 344, the fourth gear 345 is meshingly connected with the third gear 342, and a second handle 346 is fixedly installed on the fourth rotating drum 344. A second support 347 is fixedly installed on the other end of the third rotating drum 341 away from the third gear 342, the second support 347 is arranged below the first support 337, a second swing arm 348 is fixedly hingedly connected to the one end of the second support 347 away from the third rotating drum 341, and the one end of the second swing arm 348 away from the second support 347 is also rotatably connected with the loading disc 4.

[0075] The fifth rotating drum 351 is rotatably installed on the third rotating drum 341, the fifth gear 352 is fixedly installed on the fifth rotating drum 351, and the fifth gear 352 is arranged above the third gear 342. The third mounting column 353 is fixedly installed on the bottom plate 31, the sixth rotating drum 354 is rotatably installed on the third mounting column 353, the sixth gear 355 is fixedly installed on the sixth rotating drum 354, the sixth gear 355 is in meshing connection with the fifth gear 352, and the third handle 356 is fixedly installed on the sixth rotating drum 354. The third support 357 is fixedly installed on the other end of the fifth rotating drum 351 away from the fifth gear 352, the third support 357 is arranged below the second support 347, the third swing arm 358 is hingedly connected to the end of the third support 357 away from the fifth rotating drum 351, and the end of the third swing arm 358 away from the third support 357 is also rotatably connected to the loading tray 4. In the embodiment, the three connection points of the first swing arm 338, the second swing arm 348 and the third swing arm 358 on the loading tray 4 are arranged on the trisection line of the loading tray 4.

[0076] The mounting groove 41 for placing the lens is arranged on the loading tray 4, the fixing assembly for fixing the lens is arranged on the loading tray 4, the receiving groove 42 is arranged on the loading tray 4 and is in communication with the mounting groove 41, the fixing assembly comprises the fixing block 431, the fixing block 431 is slidably installed on the loading tray 4, the fixing block 431 is arranged in the receiving groove 42, the first lead screw 432 is rotatably installed on the fixing block 431, the first lead screw 432 is in threaded connection with the loading tray 4, and the end of the first lead screw 432 away from the fixing block 431 extends out of the loading tray 4. The support rod 433 is fixedly installed on the fixing block 431, the second lead screw 434 is in threaded connection with the support rod 433, the second lead screw 434 is vertically arranged, and the pressing piece 435 is rotatably installed at the bottom end of the second lead screw 434. In the embodiment, the fixing block 431 and the pressing piece 435 are made of soft rubber or silicone material.

[0077] In the use process of the lens, the lens may be unclear, scratches may appear on the surface of the lens, and the camera may fall to the ground. At this time, the camera needs to be inspected and maintained. In daily life, most operators directly hold the lens in their hands, irradiate the lens through a light source, and rotate and tilt the angle of the lens to check whether the lens is abnormal. However, the operator may easily contaminate the lens with fingerprints during the process of holding the lens by hand, which affects observation, and the lens may also be easily worn and damaged due to falling.

[0078] When the lens needs to be inspected, the lens is placed in the mounting groove 41 on the carrier disc 4, the first screw rod 432 is rotated to push the fixing block 431 out of the storage groove 42 to clamp the lens, preventing the lens from moving on the carrier disc 4, the second screw rod 434 is rotated to push the lens pressing piece 435 to press on the lens, enhancing the stability of the lens and preventing the lens from falling. After the lens is fixed, the first gear 332 is driven to rotate by rotating the second gear 335 controlled by the first handle 336, the first support 337 is driven to rotate by the first gear 332, the first support 337 pulls the first swing arm 338 to swing downward, the first swing arm 338 pulls the carrier disc 4 to tilt to one side of the connection position of the first swing arm 338 and the carrier disc 4. Because the second swing arm 348 is hinged to the second support 347, the second swing arm 348 is rotationally connected to the carrier disc 4, the third swing arm 358 is hinged to the third support 357, and the third swing arm 358 is rotationally connected to the carrier disc 4. When the first swing arm 338 pulls the carrier disc 4 to tilt, the second swing arm 348 and the third swing arm 358 will simultaneously lift the carrier disc 4, and cooperate with the first swing arm 338 to complete the tilting of the carrier disc, thereby facilitating the operator to inspect the lens.

[0079] By rotating the second handle 346 to control the swing of the second swing arm 348 and rotating the third handle 356 to control the swing of the third swing arm 358, the carrier disc 4 can be quickly rotated and tilted in multiple directions, which is convenient for the operator to inspect the lens from different angles, thereby quickly inspecting and maintaining the lens. By rotating the carrier disc 4 to support the lens, the risk of lens falling is avoided, the factors that cause scratches on the lens are reduced, and the efficiency of the lens inspection process is improved.

[0080] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A vehicle-mounted MOS imaging lens characterized in that: The optical system comprises six lens pieces arranged in order from the object side to the image side along the light incident path as a first lens (11), a second lens (12), a diaphragm (13), a third lens (14), a fourth lens (15), a fifth lens (16) and a sixth lens (17); the first lens (11) is a meniscus concave negative lens, the second lens (12) is a concave-convex positive lens, the third lens (14) is a double-convex positive lens, the fourth lens (15) is a concave-convex negative lens, the fifth lens (16) is a double-convex positive lens, and the sixth lens (17) is a meniscus convex negative lens; the fourth lens (15) and the fifth lens (16) form a cemented lens group; the second lens (12), the fourth lens (15), the fifth lens (16) and the sixth lens (17) are plastic aspherical lenses; the image side surface of the first lens (11) is concave; the object side surface of the second lens (12) is concave, and the image side surface is convex; the object side surface of the third lens (14) is convex, and the image side surface is convex; the object side surface of the fourth lens (15) is convex, and the image side surface is concave; the object side surface of the fifth lens (16) is convex, and the image side surface is convex; the object side surface of the sixth lens (17) is convex, and the image side surface is concave; the focal length of the optical system is f, and the focal lengths of the first lens (11), the second lens (12), the third lens (14), the fourth lens (15), the fifth lens (16) and the sixth lens (17) are f1, f2, f3, f4, f5 and f6 in order, wherein f1, f2, f3, f4, f5 and f6 satisfy the following ratios: -2 < f1 / f < -1; 5 < f2 / f < 8; 1 < f3 / f < 2; -2 < f4 / f < -1; 1 < f5 / f < 2; and -9 < f6 / f < -7. 2.The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: The object side surface of the first lens (11) is a plane. 3.The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: The first lens (11) and the third lens (14) are glass spherical lenses, and the second lens (12), the fourth lens (15), the fifth lens (16) and the sixth lens (17) are plastic aspherical lenses.

4. The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: The air gap between the first lens (11) and the second lens (12) is 1.8 to 2.2 mm; the air gap between the second lens (12) and the diaphragm (13) is 0.0 to 0.3 mm; the air gap between the diaphragm (13) and the third lens (14) is 0.0 to 0.3 mm; the air gap between the third lens (14) and the fourth lens (15) is 0.0 to 0.6 mm; and the air gap between the fifth lens (16) and the sixth lens (17) is 0.2 to 1.0 mm.

5. The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: N d V is the refractive index. d Let N be the Abbe constant. The refractive index of the first lens (11) and the Abbe constant satisfy the following relationship: 1.4 ≤ N d ≤1.7,V d ≥55; The refractive index and Abbe constant of the second lens (12) satisfy the following relationship: 1.5≤N d ≤1.8, V d ≤60; The refractive index and Abbe constant of the third lens (14) satisfy the following relationship: 1.4≤N d ≤1.8, V d ≥55; The refractive index and Abbe constant of the fourth lens (15) satisfy the following relationship: 1.4≤N d ≤1.8, V d ≤60; The refractive index and Abbe constant of the fifth lens (16) satisfy the following relationship: 1.4≤N d ≤1.6,V d ≥50; The refractive index and Abbe constant of the sixth lens (17) satisfy the following relationship: 1.5≤N d ≤1.8, V d ≤60.

6. The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: The aspherical curve equation expression of the aspherical lens is: Z is the sag of the aspherical surface at a position with a height of h along the optical axis from the vertex of the aspherical surface, c is the paraxial curvature of the aspherical surface, k is the conic constant, and a1, a2, a3, a4, a5, a6, a7, and a8 are high-order coefficients.

7. The vehicle-mounted MOS imaging lens according to claim 1, characterized in that: The total optical length TTL of the optical system and the focal length f of the optical system satisfy TTL / f ≤ 5; the F number of the optical system is ≤ 2.4; and the image height H of the optical system and the focal length f of the optical system satisfy H / f ≥ 1.0.

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