Lens calibration tool for automobile rear-mounted lens

Abstract

The utility model relates to the field of lens calibration, and discloses a lens calibration tool for an automobile rear-mounted lens, which comprises a camera body, the bottom of the camera body is provided with a base, the top of the base is fixedly connected with a first supporting plate, the side wall of the first supporting plate is fixedly connected with a telescopic sleeve, and the telescopic sleeve is fixedly connected with a second supporting plate. The inner wall of the telescopic sleeve is fixedly connected with a telescopic spring, the top of the base is fixedly connected with a second supporting plate, the inner wall of the second supporting plate is in threaded connection with a lead screw, and the right end of the lead screw is fixedly connected with a handle. According to the utility model, through the arrangement of the two groups of supporting plates, the telescopic sleeve, the telescopic spring and other structures, the optical path is changed by using the lenses with different degrees, the optical path is adjusted back to the original TTL to recover analysis, and the positioning force is provided for the camera in the calibration operation, so that the calibration error caused by the offset of the camera in the calibration operation is avoided; and meanwhile, a placement point is provided for the lens to facilitate quick replacement for calibration.

Description

Technical Field

[0001] This utility model relates to the field of lens calibration, and in particular to a lens calibration tool for automotive aftermarket lenses. Background Technology

[0002] Automotive rear-mounted cameras are mainly used to assist drivers in better observing the situation behind the vehicle when reversing, thereby improving driving safety and convenience. Automotive rear-mounted cameras have functions such as reversing image, assisting in observing the surrounding environment of the vehicle, and working in conjunction with other systems.

[0003] Due to the rapid development of the automotive and artificial intelligence industries, the importance of camera modules is becoming increasingly apparent. Currently, if a camera module suffers minor damage that alters its focal length, the entire module must be replaced. For example, if a vehicle is involved in a collision that causes the camera lens to shift backward, the entire camera must be replaced to ensure subsequent imaging quality.

[0004] In existing technologies, once a collision causes the lens of a camera to shift backward, the entire camera needs to be replaced. However, camera modules are large and expensive, and the replacement time is long. The compatibility between the camera and other electronic systems in the car, such as reversing camera systems and parking assistance systems, is difficult to guarantee, and it also affects the appearance of the vehicle. Therefore, a lens calibration tool for aftermarket automotive lenses is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a lens calibration tool for automotive aftermarket lenses, which aims to improve the existing technology of lens calibration tools for automotive aftermarket lenses. When the lens shifts backward, the tool adjusts the optical path by using lenses of different powers to avoid replacing the entire camera, which would result in excessive costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lens calibration tool for automotive aftermarket lenses, comprising a camera body, a base at the bottom of the camera body, a support plate I fixedly connected to the top of the base, a telescopic sleeve fixedly connected to the side wall of the support plate I, a telescopic spring fixedly connected to the inner wall of the telescopic sleeve, a support plate II fixedly connected to the top of the base, a lead screw threadedly connected to the inner wall of the support plate II, a handle fixedly connected to the right end of the lead screw, a clamping plate rotatably connected to the left end of the lead screw, a limit rod fixedly connected to the side wall of the clamping plate, and a lens placement assembly at the top of the base.

[0007] As a further description of the above technical solution:

[0008] The side of the clamp away from the lead screw is fixedly connected with an anti-slip sticker, and the limiting rod passes through the second support plate. The outer wall of the limiting rod is slidably connected to the inner wall of the second support plate.

[0009] As a further description of the above technical solution:

[0010] The lens placement assembly includes a placement base, the inner wall of which is provided with a sponge pad.

[0011] As a further description of the above technical solution:

[0012] The bottom of the placement seat is fixedly connected to the top of the base, the center of the placement seat has a circular opening, and the inner wall of the placement seat has a cavity.

[0013] As a further description of the above technical solution:

[0014] The bottom of the sponge pad is in contact with the inner wall of the placement seat.

[0015] As a further description of the above technical solution:

[0016] The inner wall of the placement seat is fixedly connected to a telescopic rod, the movable end of the telescopic rod is fixedly connected to a fixing frame, the inner wall of the fixing frame is rotatably connected to a guide wheel via a rotating shaft, and the outer wall of the telescopic rod is fitted with a limiting spring.

[0017] As a further description of the above technical solution:

[0018] One end of the limiting spring is fixedly connected to the inner wall of the placement seat, and the other end of the limiting spring is fixedly connected to the outer wall of the fixing frame.

[0019] As a further description of the above technical solution:

[0020] The guide wheel is located on the side of the placement seat near the circular opening.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by combining two sets of support plates, telescopic sleeves, telescopic springs, clamping plates, lead screws, limiting rods and lens placement components, when a car rear-mounted camera is moved backward due to a collision, it can use lenses of different powers to change the optical path, adjust back to the original TTL and restore resolution. In addition, it provides positioning force for the camera during calibration, avoiding camera displacement during calibration and preventing calibration errors. At the same time, it provides placement points for lenses to facilitate quick replacement and calibration.

[0023] 2. In this utility model, by setting up structures such as telescopic rods, limiting springs, fixing frames and guide wheels, it can adapt to different sizes of lenses when placing them, provide precise positioning and stability, keep them in a vertical state in front of the camera lens for calibration, and improve image quality. Attached Figure Description

[0024] Figure 1 This is a right-side view of the main structure of a lens calibration tool for automotive aftermarket lenses proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the main structure of a lens calibration tool for automotive aftermarket lenses, as proposed in this utility model, separated on the left side.

[0026] Figure 3 This utility model proposes a lens calibration tool for automotive aftermarket lenses. Figure 2 Enlarged view of region A in the middle;

[0027] Figure 4 This is a cross-sectional schematic diagram of the placement seat structure for a lens calibration tool for automotive aftermarket lenses proposed in this utility model.

[0028] Legend:

[0029] 1. Camera body; 2. Base; 3. Support plate one; 4. Telescopic sleeve; 5. Telescopic spring; 6. Clamping plate; 7. Anti-slip pad; 8. Handle; 9. Lead screw; 10. Limiting rod; 11. Placement seat; 12. Sponge pad; 13. Telescopic rod; 14. Limiting spring; 15. Fixing frame; 16. Guide wheel; 17. Support plate two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1-3This utility model provides an embodiment of a lens calibration tool for automotive aftermarket lenses, comprising a camera body 1, a base 2 at the bottom of the camera body 1 for placement, a support plate 3 fixedly connected to the top of the base 2, a telescopic sleeve 4 fixedly connected to the side wall of the support plate 3, a telescopic spring 5 fixedly connected to the inner wall of the telescopic sleeve 4, a second support plate 17 fixedly connected to the top of the base 2, a lead screw 9 threadedly connected to the inner wall of the second support plate 17, a handle 8 fixedly connected to the right end of the lead screw 9, and a clamping plate 6 rotatably connected to the left end of the lead screw 9. Two sets of clamping plates 6 are provided, with the second set of clamping plates 6 fixedly connected to the movable end of the telescopic sleeve 4. The two sets of clamping plates 6 provide clamping to both sides of the camera body 1. The left side clamping plate 6 has an elastic clamping force that, in environments with slight vibration, counteracts the impact of vibration on the camera body 1 as the telescopic spring 5 extends and retracts, enhancing the stability of the camera installation. Simultaneously, the telescopic spring 5 automatically adjusts the pressure and position of the clamping plate according to the thickness of the camera body 1, adapting to camera bodies 1 of different sizes. An anti-slip pad 7, made of rubber, is fixedly connected to the side of the clamping plate 6 away from the lead screw 9, increasing the friction between the clamping plate 6 and the camera body 1 and ensuring the positioning force on the camera body 1. A limiting rod 10 is fixedly connected to the side wall of the clamping plate 6, penetrating the second support plate 17, with the outer wall of the limiting rod 10 slidably connected to the inner wall of the second support plate 17.

[0032] Reference Figures 1-2 , Figure 4 The top of the base 2 is provided with a lens placement assembly, which includes a placement seat 11. The inner wall of the placement seat 11 is provided with a sponge pad 12. The sponge pad 12 can reduce the friction between the lens and the placement seat 11 when the lens is placed inside the placement seat 11. The softness of the sponge pad 12 can ensure the stable placement of the lens. The bottom of the sponge pad 12 fits into the inner wall of the placement seat 11. The bottom of the placement seat 11 is fixedly connected to the top of the base 2. The center of the placement seat 11 is provided with a circular opening, which facilitates the placement of the lens at the lens position of the camera body 1. The inner wall of the placement seat 11 is provided with a cavity. In scenarios where TTL needs to be restored and resolution needs to be guaranteed, hard optical glass is usually selected, which can ensure the accuracy of the optical path, long-term stability and imaging quality.

[0033] Reference Figure 4A telescopic rod 13 is fixedly connected to the inner wall of the placement seat 11. A fixing frame 15 is fixedly connected to the movable end of the telescopic rod 13. A guide wheel 16 is rotatably connected to the inner wall of the fixing frame 15 via a rotating shaft. The guide wheel 16 is located on the side of the placement seat 11 near the circular opening. A limiting spring 14 is sleeved on the outer wall of the telescopic rod 13. One end of the limiting spring 14 is fixedly connected to the inner wall of the placement seat 11, and the other end of the limiting spring 14 is fixedly connected to the outer wall of the fixing frame 15. Two sets of guide wheels 16 are provided. The two sets of guide wheels 16 contact the two sides of the lens through the telescopic characteristics of the two sets of telescopic rods 13 and the limiting spring 14, providing alignment and guidance when the lens is placed.

[0034] Working principle: When a collision causes a change in the TTL of the lens of a car's aftermarket camera, resulting in a smaller focal length and lower resolution, a computer algorithm can analyze the resolution or TTL change. By adding a 1p glass in front of the camera body 1 to change the optical path, the TTL can be adjusted back to its original value, restoring resolution. First, place the camera body 1 on the base 2, with the lens of the camera body 1 facing the side of the base 11. Manually rotate the handle 8; rotating the handle 8 forwards and backwards controls the right-side clamp 6 to move closer to or further away from the camera body 1, in conjunction with the limiting... The movement of the positioning lever 10 allows the two sets of clamping plates 6 to position the camera body 1. The cooperation between the telescopic sleeve 4 and the telescopic spring 5 provides cushioning when clamping the camera body 1, preventing excessive clamping force. Lenses of various angles are prepared for initial screening, such as lenses from 0-120 degrees. Initial screening tests are conducted at 0, 20, 40, 60, 80, 100, and 120 degrees, using larger step sizes to quickly identify the area with the best performance. A key testing point is set at 20 degrees, and image quality scores are recorded. Assuming the highest score is achieved at 60 degrees, further tests are conducted at 10-degree steps. In the step-size test, the fine screening was between 50 and 70 degrees. It was found that 60 degrees was still the best. Finally, the test was conducted in 5-degree steps, testing 55, 60, and 65 degrees. Finally, 60 degrees was determined to be the best, or 65 degrees might be better. This process was repeated to further refine the parameters. When different lenses enter, they contact the two sets of rubber guide wheels 16. The telescopic rod 13 and the limiting spring 14 ensure that the lens is in a vertical position. At the same time, the sponge pad 12 provides protection for the lens. By continuously refining the parameters, the lens of the corresponding degree can be quickly selected to adjust the optical path direction of the camera body 1. Finally, after selecting the lens of the corresponding degree according to the degree of damage to the camera body 1, the lens is installed at the lens of the camera body 1 to improve the optical path direction adjustment TTL. This avoids the need for lens replacement due to impact to the camera body 1, reduces costs, avoids waste of resources, and has a short repair time with minimal impact on the vehicle's existing system. Adjusting the optical path by changing the curvature or angle of the lens is a core method in optical system design. Its principle is mainly based on the optical laws and theories of Snell's law of refraction and reflection.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens calibration tool for automotive aftermarket lenses, comprising a camera body (1), wherein a base (2) is provided at the bottom of the camera body (1), characterized in that: The top of the base (2) is fixedly connected to a support plate (3), the side wall of the support plate (3) is fixedly connected to a telescopic sleeve (4), the inner wall of the telescopic sleeve (4) is fixedly connected to a telescopic spring (5), the top of the base (2) is fixedly connected to a support plate (17), the inner wall of the support plate (17) is threadedly connected to a lead screw (9), the right end of the lead screw (9) is fixedly connected to a handle (8), the left end of the lead screw (9) is rotatably connected to a clamping plate (6), the side wall of the clamping plate (6) is fixedly connected to a limit rod (10), and the top of the base (2) is provided with a lens placement assembly.

2. The lens calibration tool for automotive aftermarket lenses according to claim 1, characterized in that: The clamping plate (6) is fixedly connected to the side away from the lead screw (9) with an anti-slip sticker (7), and the limiting rod (10) passes through the second support plate (17). The outer wall of the limiting rod (10) is slidably connected to the inner wall of the second support plate (17).

3. The lens calibration tool for automotive aftermarket lenses according to claim 1, characterized in that: The lens placement assembly includes a placement seat (11), and the inner wall of the placement seat (11) is provided with a sponge pad (12).

4. The lens calibration tool for automotive aftermarket lenses according to claim 3, characterized in that: The bottom of the placement seat (11) is fixedly connected to the top of the base (2), the center of the placement seat (11) is provided with a circular opening, and the inner wall of the placement seat (11) is provided with a cavity.

5. The lens calibration tool for automotive aftermarket lenses according to claim 3, characterized in that: The bottom of the sponge pad (12) is in contact with the inner wall of the placement seat (11).

6. The lens calibration tool for automotive aftermarket lenses according to claim 3, characterized in that: The inner wall of the placement seat (11) is fixedly connected to a telescopic rod (13), the movable end of the telescopic rod (13) is fixedly connected to a fixing frame (15), the inner wall of the fixing frame (15) is rotatably connected to a guide wheel (16) via a rotating shaft, and the outer wall of the telescopic rod (13) is fitted with a limiting spring (14).

7. The lens calibration tool for automotive aftermarket lenses according to claim 6, characterized in that: One end of the limiting spring (14) is fixedly connected to the inner wall of the placement seat (11), and the other end of the limiting spring (14) is fixedly connected to the outer wall of the fixing frame (15).

8. A lens calibration tool for automotive aftermarket lenses according to claim 6, characterized in that: The guide wheel (16) is located on the side of the placement seat (11) near the circular opening.

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