Anti-imaging error dual-lens vehicle-mounted camera module and focusing method thereof

Abstract

The application provides a double-lens vehicle-mounted camera module capable of preventing imaging errors and a focusing method thereof. During focusing, the position of the reflecting mirror and the photosensitive chip is fixed first, then the substrate is fixed to the rear end of the base body, the position of the second camera relative to the substrate is adjusted, the optical center of the second camera is made to coincide with the center of the second photosensitive area on the photosensitive chip, and finally the position of the first camera relative to the first photosensitive area is adjusted, so that the optical center of the first camera coincides with the center of the first photosensitive area after being reflected by the reflecting mirror. The position of the reflecting mirror and the photosensitive chip is fixed first, so that the interval between the two is kept, the imaging errors caused by tolerances are reduced, the two lenses have their own imaging areas on the photosensitive chip to generate corresponding electrical signals, and cross talk is prevented. The steps are simple, the volume is reduced, the blind area of the field of view is reduced, the device can be applied to more thin and small devices, the structure is simple, the layout is reasonable, and the application prospect is good.

Description

Technical Field

[0001] This application relates to the field of lens equipment, specifically to a dual-lens vehicle-mounted camera module for preventing imaging errors and its focusing method. Background Technology

[0002] Traditional car rearview mirrors, due to their reflective angle, display area, and susceptibility to adverse conditions, often result in blind spots and unclear images for drivers, compromising driving safety. With advancements in automotive technology, electronic rearview mirrors have emerged to replace traditional ones. Compared to traditional mirrors, electronic rearview mirrors are smaller, reducing wind resistance and energy consumption; they utilize wide-angle cameras to minimize blind spots; and through superior sensors and optical lenses, they provide drivers with a clearer and more effective field of vision in adverse conditions such as nighttime, rain, and snow.

[0003] However, traditional electronic rearview mirrors generally use one optical lens and one chip to form an image. For large vehicles such as trucks with more blind spots, multiple electronic rearview mirrors are needed to obtain a wider field of view. This results in a larger and more complex imaging module, which cannot be applied to thinner or smaller devices, and also increases costs.

[0004] A few use two optical lenses to match one chip for imaging. Since there will be positional errors when the photosensitive chip is packaged on the substrate or the substrate is locked to the base with screws, the cumulative tolerance will cause the position between the sensor chip and the reflector to be deviated, resulting in the imaging areas of the two lenses being biased to the left or right, or even the light going to another area, which will have imaging problems in the other area. Summary of the Invention

[0005] To overcome the technical problems of blind spots and imaging errors in existing trucks, this application describes an anti-imaging error dual-lens vehicle camera module, which can provide a wider field of view, avoid imaging errors, and save size. It can enhance the monitoring of the situation behind, to the side and below the vehicle, greatly eliminate blind spots, improve driving safety, and can be applied to lighter or smaller devices.

[0006] A dual-lens vehicle-mounted camera module for preventing imaging errors includes: The base body has a receiving cavity on its rear side and a first assembly groove and a second assembly groove that form an angle with each other and are respectively connected to the receiving cavity on its front side. A substrate is disposed at the rear end of the base body, and a photosensitive chip located in the accommodating cavity is disposed thereon. The photosensitive chip is provided with a first photosensitive area and a second photosensitive area. The second camera is installed in the second mounting slot and can image onto the second photosensitive area. The second camera includes a second optical system. A first camera is installed in the first mounting slot and is tilted relative to the photosensitive chip. The first camera includes a first optical system. A reflector is disposed within the base body, located between the first camera and the photosensitive chip, and maintains a relatively fixed position relative to the first photosensitive area, for reflecting light emitted from the first camera onto the first photosensitive area.

[0007] As described above, in a dual-lens vehicle camera module for preventing imaging errors, the first mounting slot and the accommodating cavity are connected by a first light passage, and the inner wall of the first light passage is provided with a mirror groove for placing the reflector on the light emission path of the first camera.

[0008] As described above, in a dual-lens vehicle camera module for preventing imaging errors, the second camera is installed in the second mounting slot and is vertically positioned relative to the photosensitive chip. The second mounting slot and the accommodating cavity are connected by a second light channel, and the light emitted from the second camera is directly imaged onto the photosensitive chip through the second light channel.

[0009] As described above, in a dual-lens vehicle camera module designed to prevent imaging errors, the first photosensitive area and the second photosensitive area are separated by the reflector.

[0010] As described above, in a dual-lens vehicle camera module for preventing imaging errors, the rear end of the base body is provided with several outwardly protruding prepositioning posts, the substrate is provided with prepositioning holes that cooperate with the prepositioning posts, and the base body and the substrate are locked together by fasteners.

[0011] As described above, in a dual-lens vehicle camera module designed to prevent imaging errors, the included angle between the first camera and the second camera is 30°-70°.

[0012] Another objective of this application is to provide a focusing method for the aforementioned dual-lens vehicle-mounted camera module with anti-imaging error features, comprising the following steps: After fixing the positions of the reflector and the photosensitive chip relative to each other, fix the substrate to the rear end of the base body; The second camera is installed in the second mounting slot. The position of the second camera relative to the second photosensitive area is adjusted so that the optical center of the second camera coincides with the center of the second photosensitive area. After the adjustment is completed, the second camera is fixed in the second mounting slot. The first camera is assembled in the first mounting slot, and the position of the first camera relative to the first photosensitive area is adjusted so that the optical center of the first camera coincides with the center of the first photosensitive area after being reflected by the reflector. After the adjustment is completed, the first camera is fixed in the first mounting slot.

[0013] The focusing method for the dual-lens vehicle camera module described above to prevent imaging errors, specifically includes the step of "adjusting the position of the second camera relative to the second photosensitive area so that the optical center of the second camera coincides with the center of the second photosensitive area": Determine the preset center position of the second photosensitive area; Based on the position of the optical center of the second camera, determine the second offset between the optical center of the second camera and the center of the second photosensitive area; Based on this second offset, the position of the second camera relative to the substrate is adjusted so that the optical center of the second camera coincides with the center of the second photosensitive area.

[0014] The focusing method for the dual-lens vehicle camera module described above to prevent imaging errors includes the following steps: "Adjusting the position of the first camera relative to the first photosensitive area so that the optical center of the first camera coincides with the center of the first photosensitive area after being reflected by the mirror." Determine the preset center position of the first photosensitive area; Based on the optical center position of the first camera, determine the first offset between the optical center of the first camera after reflection by the mirror and the center of the first photosensitive area; Based on this first offset, the position of the first camera relative to the substrate is adjusted so that the optical center of the first camera after reflection by the mirror coincides with the center of the second photosensitive area.

[0015] The focusing method of the dual-lens vehicle camera module for preventing imaging errors, as described above, specifically includes "fixing the substrate to the rear end of the base body": first, pre-positioning the substrate at the rear side of the base body, and then locking the substrate to the rear end of the base body with screws.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a dual-lens vehicle camera module to prevent imaging errors. By setting a first lens and a second lens at an angle to each other on the base body, a wider field of view can be provided. At the same time, a first photosensitive area and a second photosensitive area are set on the photosensitive chip. The reflector and the photosensitive chip are relatively fixed in position, and the distance between them can reduce the imaging error caused by tolerance. The reflector can reflect the light emitted from the first lens to the first photosensitive area, and the second lens can directly image onto the second photosensitive area. This ensures that the two lenses have their own imaging areas on the photosensitive chip to sense and generate corresponding electrical signals, preventing crosstalk. This application can image road conditions at different distances and from different angles onto different photosensitive areas of the same photosensitive chip, achieving the purpose of reducing size and reducing blind spots. It enhances the monitoring of the situation behind, to the sides and below the vehicle, greatly eliminates blind spots, improves driving safety, and can be applied to thinner or smaller devices. It has a simple structure, reasonable layout, and good application prospects.

[0017] This application provides a focusing method for a dual-lens vehicle camera module to prevent imaging errors. First, the reflector and the photosensitive chip are fixed in relative positions. Then, the substrate is fixed to the rear end of the base body. Next, the position of the second camera relative to the substrate is adjusted so that the optical center of the second camera coincides with the center of the second photosensitive area on the photosensitive chip. Finally, the position of the first camera relative to the first photosensitive area is adjusted so that the optical center of the first camera, after reflection by the reflector, coincides with the center of the first photosensitive area. The focusing process of this application is simple. By first fixing the reflector and the photosensitive chip in relative positions to maintain a distance between them to reduce imaging errors caused by tolerances, and then automatically aligning the optical centers of the lenses with the centers of the photosensitive areas, it ensures that each lens has its own imaging area on the photosensitive chip to generate corresponding electrical signals, reducing interference with each other's imaging. The process is simple, the focusing effect is obvious, and it has good application prospects. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the focusing process in an embodiment of this application; Figure 2 This is a three-dimensional schematic diagram of the camera module in the embodiments of this application; Figure 3 This is a cross-sectional schematic diagram of the camera module in an embodiment of this application; Figure 4 This is an exploded view of the camera module in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the base body in an embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of the base body in an embodiment of this application; Figure 7 This is a schematic diagram of the camera module structure in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the first optical system in the first lens of the embodiment of this application; Figure 9 The field curvature and distortion curves of the first optical system according to an embodiment of this application are shown. Figure 10 The MTF curve of the first optical system according to an embodiment of this application is shown; Figure 11 A schematic diagram of the structure of the second optical system in the second lens of this application embodiment is shown; Figure 12 The field curvature and distortion curves of the second optical system according to an embodiment of this application are shown. Figure 13 The MTF curve of the second optical system according to an embodiment of this application is shown. Detailed Implementation

[0019] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] When ordinal numbers such as "first" and "second" are mentioned in the embodiments of the present invention, unless they actually express the meaning of order according to the context, they should be understood as being used only for differentiation.

[0021] A dual-lens vehicle camera module for preventing imaging errors includes a base body 5, a substrate 6, a photosensitive chip 3, a second camera 2, a first camera 1, and a reflector 4. The base body 5 has a accommodating cavity 50 on its rear side and a first mounting groove 55 and a second mounting groove 54 at an angle to each other and communicating with the accommodating cavity 50 on its front side. The substrate 6 is located at the rear end of the base body 5 and has a photosensitive chip 3 located within the accommodating cavity 50. The photosensitive chip 3 has a first photosensitive area 32 and a second photosensitive area 31. The second camera 2 is installed in the second mounting groove 54 and can image onto the second photosensitive area 31. The first camera 1 is installed in the first mounting groove 55 and is tilted relative to the photosensitive chip 3. The reflector 4 is located within the base body 5, between the first camera 1 and the photosensitive chip 3, and maintains a relatively fixed position with the first photosensitive area 32, for reflecting light emitted from the first camera 1 onto the first photosensitive area 32.

[0022] This application provides a dual-lens vehicle camera module to prevent imaging errors. By setting a first lens and a second lens at an angle to each other on the base body, a wider field of view can be provided. At the same time, a first photosensitive area and a second photosensitive area are set on the photosensitive chip. The reflector and the photosensitive chip are relatively fixed in position, and the distance between them can reduce imaging errors caused by tolerance. The reflector can reflect the light emitted from the first lens to the first photosensitive area, and the second lens can directly image onto the second photosensitive area. This ensures that the two lenses have their own imaging areas on the photosensitive chip to sense and generate corresponding electrical signals, preventing crosstalk. This application can image road conditions at different distances and from different angles onto different photosensitive areas of the same photosensitive chip, achieving the purpose of reducing size and reducing blind spots. It enhances the monitoring of the situation behind, to the sides and below the vehicle, greatly eliminates blind spots, improves driving safety, and can be applied to thinner or smaller devices. It has a simple structure, reasonable layout, and good application prospects.

[0023] Preferably, the first mounting groove 55 and the accommodating cavity 50 are connected by a first light channel 57, and the first camera 1 is installed in the first mounting groove 55 at an angle relative to the photosensitive chip 3. The inner wall of the first light channel 57 is provided with a mirror groove 58 for placing the reflector 4 on the light emission path of the first camera 1. The reflector 4 is gradually tilted from the first camera 1 toward the photosensitive chip 3 toward the second camera 2. In order to enable the mutually angled lenses to emit light onto the photosensitive chip at the same time, this application sets a reflector on the light emission path of the first lens to reflect the emitted light onto the imaging surface 8. By utilizing the principle of light refraction, the two lenses can simultaneously capture the image, and the two lenses can achieve imaging over a large area towards the rear of the car and the lower side of the car, thereby ensuring a sufficiently large field of view. The tilted reflector can reflect the light emitted from the first lens onto the photosensitive chip. This design makes the structure more compact and saves volume.

[0024] Preferably, when the second camera 2 is installed in the second mounting slot 54, it is vertically positioned relative to the photosensitive chip 3. The second mounting slot 54 and the accommodating cavity 50 are connected by a second light channel 56. The light emitted from the second camera 2 is directly imaged onto the photosensitive chip 3 through the second light channel 56. The second lens 2 of this application can directly mount the captured image onto the photosensitive chip, ensuring that the optical axis enters the photosensitive chip vertically. The dual lenses provide a wider field of view, enhance the monitoring of the situation behind, to the side and below the vehicle, and improve driving safety.

[0025] Preferably, the first photosensitive area 32 and the second photosensitive area 31 are separated by a reflector 4. Without a separation zone, crosstalk can easily occur between the two imaging elements, occupying each other's positions and causing imaging interference between them in each other's areas. In this application, the reflector and the photosensitive chip are relatively fixed in position, eliminating errors and reducing interference with each other's imaging. The lens optical center is automatically aligned with the center of the photosensitive area, reducing tolerances and preventing crosstalk. The photosensitive chip is a CMOS image sensor or a CCD image sensor. By setting two photosensitive areas on the photosensitive chip, high-definition two-dimensional image signals can be acquired separately, making full preparations for generating high-definition images through software later.

[0026] Preferably, the rear end of the base body 5 is provided with a plurality of outwardly protruding prepositioning posts 91, and the substrate 6 is provided with prepositioning holes 92 that cooperate with the prepositioning posts 91. The base body 5 and the substrate 6 are locked together by fasteners. By setting a prepositioning structure, this application can further reduce assembly difficulty and tolerance. By pre-fixing the positions of the reflector and the photosensitive chip, imaging errors can be avoided. The substrate and the base body are locked together by screws, which can pre-fix the substrate and facilitate subsequent lens focusing and fixing.

[0027] Preferably, the angle between the first camera 1 and the second camera 2 is 30°-70°. More preferably, it is 45°-60°. This range provides a wider field of view and is also conducive to the installation of rearview mirrors. It can enhance the monitoring of the situation behind, to the sides, and below the vehicle, greatly eliminate blind spots, improve driving safety, and can be applied to thinner or smaller devices. It has a simple structure, reasonable layout, and good application prospects.

[0028] Preferably, the base body 5 includes a support portion 51 with a rear opening, and a second lens barrel portion 52 and a first lens barrel portion 53 disposed on the front side of the support portion 51. The rear end of the support portion 51 is connected to a substrate 6 for mounting the photosensitive chip 3. The accommodating cavity 50 is formed between the substrate 6 and the support portion 51. The second mounting groove 54 and the first mounting groove 55 are respectively disposed in the second lens barrel portion 52 and the first lens barrel portion 53. The input end of the substrate 6 is electrically connected to the photosensitive chip 3 for transmitting the electrical signals generated when the photosensitive chip 3 is working. The second lens barrel portion 52 and the second lens 2, and the first lens barrel portion 53 and the first lens 1 are all bonded together with adhesive. This application can integrate the second lens and the first lens into one piece on the base. The photosensitive chip can simultaneously receive the light emitted from the second lens and the first lens and sense and generate corresponding electrical signals, making the structure more compact and saving space.

[0029] A focusing method for the aforementioned dual-lens vehicle-mounted camera module designed to prevent imaging errors includes the following steps: S1: After fixing the positions of the reflector 4 and the photosensitive chip 3 relative to each other, fix the substrate 6 to the rear end of the base body 5. S2: Assemble the second camera 2 in the second mounting slot 54, adjust the position of the second camera 2 relative to the second photosensitive area 31 so that the optical center of the second camera 2 coincides with the center of the second photosensitive area 31, and fix the second camera 2 in the second mounting slot 54 after the adjustment is completed. S3: Assemble the first camera 1 in the first mounting slot 55, adjust the position of the first camera 1 relative to the first photosensitive area 32 so that the optical center of the first camera 1 coincides with the center of the first photosensitive area 32 after being reflected by the reflector 4, and fix the first camera 1 in the first mounting slot 55 after the adjustment is completed.

[0030] This application provides a focusing method for a dual-lens vehicle camera module to prevent imaging errors. First, the reflector and the photosensitive chip are fixed in relative positions. Then, the substrate is fixed to the rear end of the base body. Next, the position of the second camera relative to the substrate is adjusted so that the optical center of the second camera coincides with the center of the second photosensitive area on the photosensitive chip. Finally, the position of the first camera relative to the first photosensitive area is adjusted so that the optical center of the first camera, after being reflected by the reflector, coincides with the center of the first photosensitive area. The focusing process of this application is simple. By first fixing the reflector and the photosensitive chip in relative positions to maintain a distance between them to reduce imaging errors caused by tolerances, and then automatically finding the optical center of each lens to coincide with the center of the photosensitive area, it is ensured that each lens has its own imaging area on the photosensitive chip to sense and generate corresponding electrical signals, reducing interference with each other's imaging. The process is simple, the focusing effect is obvious, and it has good application prospects.

[0031] Furthermore, the step of "adjusting the position of the second camera 2 relative to the substrate 6 so that the optical center of the second camera 2 coincides with the center of the second photosensitive area 31" specifically includes: Determine the preset center position of the second photosensitive area 31; Based on the optical center position of the second camera 2, determine the second offset between the center of the second photosensitive area 31 and the optical center of the second camera 2; Based on this second offset, the position of the second camera 2 relative to the substrate 6 is adjusted so that the optical center of the second camera 2 coincides with the center of the second photosensitive area 31.

[0032] The position adjustment device used in the focusing process of this application is a conventional focusing machine in the field. During software setting, the optical center position of the second camera 2 is set in advance. The pixel of the center of the photosensitive chip is set by coordinate point method. The offset between the two is calculated by software. Then, the six-axis platform is used for fine adjustment to make the optical center of the lens coincide with the center of the photosensitive area. After the movement is completed, the second camera 2 is fixed to the base body 5 by dispensing glue.

[0033] Furthermore, the step "adjusting the position of the first camera 1 relative to the first photosensitive area 32 so that the optical center of the first camera 1 coincides with the center of the first photosensitive area 32 after being reflected by the reflector 4" specifically includes: Determine the preset center position of the first photosensitive area 31; Based on the optical center position of the first camera 1, determine the first offset between the optical center of the first camera 1 after reflection by the reflector 4 and the center of the first photosensitive area 31; Based on the first offset, the position of the first camera 1 relative to the substrate 6 is adjusted so that the optical center of the first camera 1 after being reflected by the reflector 4 coincides with the center of the second photosensitive area 31.

[0034] The focusing process in this application uses a position adjustment device that is a conventional focusing machine in the field. The software obtains the pixel point of the center of the photosensitive chip in advance by means of coordinate points. The optical center position of the first camera 1 is set in advance. The software calculates the offset between the two, and then the six-axis platform is used to finely adjust so that the optical center of the lens coincides with the center of the photosensitive area. After the movement is completed, the first camera 1 is fixed to the base body 5 by dispensing glue.

[0035] Furthermore, "fixing the substrate 6 to the rear end of the base body 5" specifically includes: first, pre-positioning the substrate 6 at the rear side of the base body 5, and then locking the substrate 6 to the rear end of the base body 5 with screws.

[0036] like Figure 8 As shown, the first optical system 1 of the first lens 1 includes, along the optical axis from the object plane to the image plane, the following components in sequence: a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16. The object plane side of the first lens 11 is convex, and the image plane side is concave. The object plane side of the second lens 12 is convex, and the image plane side is concave. The object plane side of the third lens 13 is convex, and the image plane side is concave. The object plane side of the fourth lens 14 is convex, and the image plane side is also convex. The object plane side of the fifth lens 15 is convex, and the image plane side is also convex. The object plane side of the sixth lens 16 is concave, and the image plane side is convex. The fifth lens 15 and the sixth lens 16 are combined and bonded together to form the first cemented lens.

[0037] Preferably, the first optical system 1 is a telephoto optical system, and the second optical system 2 is a wide-angle optical system, such as... Figure 2 The diagram shows a structure installed on a car's exterior rearview mirror. In this case, the first optical system 1 is facing the rear of the vehicle to take pictures, and the second optical system 2 is facing the side and below to take pictures. This can enhance the monitoring of the situation behind, to the side and below the vehicle, greatly eliminate blind spots, and improve driving safety.

[0038] Specifically, as a preferred embodiment of the present invention and not a limitation thereof, in this embodiment, the basic parameters of the first optical system can be as shown in Table 1 below; Table 1: Basic parameters of the optical system:

[0039] In the table above, along the optical axis from the object plane to the image plane, S1 and S2 correspond to the two surfaces of the first lens; S3 and S4 correspond to the two surfaces of the second lens; S5 and S6 correspond to the two surfaces of the third lens; STO corresponds to the location of the aperture stop of the optical system; S7 and S8 correspond to the two surfaces of the fourth lens; S9 and S10 correspond to the two surfaces of the fifth lens; S10 and S11 correspond to the two surfaces of the sixth lens; S12 and S13 correspond to the two surfaces of the infrared cut-off filter 27 and / or the protective glass; and S14 corresponds to the sensor imaging surface.

[0040] Depend on Figure 9 and Figure 10 As can be seen, the first optical system 1 given in the embodiment can achieve good imaging quality and has excellent imaging performance.

[0041] like Figure 11 As shown, the second optical system 2 of the second lens 2 includes, in sequence along the optical axis from the object plane to the image plane: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, and a sixth lens 26; The object plane side of the first lens 21 is a plane, and the image plane side is a concave surface; The object plane side of the second lens 22 is concave, and the image plane side is also concave. The object plane side of the third lens 23 is convex, and the image plane side is also convex. The object plane side of the fourth lens 24 is convex, and the image plane side is also convex. The object plane side of the fifth lens 25 is concave, and the image plane side is convex. The object plane side of the sixth lens 26 is convex, and the image plane side is also convex. The second lens 22 and the third lens 23 are combined and bonded together to form a second cemented lens; Lens 4 (24) and lens 5 (25) are bonded together to form a third cemented lens.

[0042] Specifically, as a preferred embodiment of the present invention and not a limitation thereof, in this embodiment, the basic parameters of the second optical system can be as shown in Table 2 below; Table 2: Basic parameters of the second optical system:

[0043] In the table above, along the optical axis from the object plane to the image plane, E1 and E2 correspond to the two surfaces of the first lens; E3 and E4 correspond to the two surfaces of the second lens; E5 and E6 correspond to the two surfaces of the third lens; ETO corresponds to the location of the aperture stop of the optical system; E7 and E8 correspond to the two surfaces of the fourth lens; E8 and E9 correspond to the two surfaces of the fifth lens; E10 and E11 correspond to the two surfaces of the sixth lens; E12 and E13 correspond to the two surfaces of the infrared cut-off filter 27 and / or the protective glass; and E14 corresponds to the sensor imaging surface.

[0044] Depend on Figures 12 to 13 As can be seen, the second optical system 2 given in the embodiment can achieve good imaging quality and has excellent imaging performance.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-lens vehicle-mounted camera module for preventing imaging errors, characterized in that, include: The base body (5) has a accommodating cavity (50) on its rear side and a first assembly groove (55) and a second assembly groove (54) that form an angle with each other and are respectively connected to the accommodating cavity (50). A substrate (6) is disposed at the rear end of the base body (5) and a photosensitive chip (3) located in the accommodating cavity (50) is disposed thereon. The photosensitive chip (3) is provided with a first photosensitive area (32) and a second photosensitive area (31). The second camera (2) is installed in the second mounting slot (54) and can image onto the second photosensitive area (31). The second camera (2) includes a second optical system. The first camera (1) is installed in the first mounting slot (55) and is tilted relative to the photosensitive chip (3). The first camera (1) includes a first optical system. A reflector (4) is disposed inside the base body (5) and located between the first camera (1) and the photosensitive chip (3). The reflector (4) is spaced apart from the photosensitive chip (3) and maintains a relatively fixed position with the first photosensitive area (32). It is used to reflect the light emitted from the first camera (1) onto the first photosensitive area (32). The first assembly groove (55) is connected to the accommodating cavity (50) through the first light channel (57). The inner wall of the first light channel (57) is provided with a mirror groove (58) for placing the reflector (4) on the light emission path of the first camera (1). The base body (5) has a plurality of outwardly protruding prepositions (91) at its rear end, and the base plate (6) has preposition holes (92) that cooperate with the prepositions (91). The base body (5) and the base plate (6) are locked together by fasteners. The first optical system is a long focal length optical system, which includes a first lens (11), a second lens (12), a third lens (13), a fourth lens (14), a fifth lens (15), and a sixth lens (16) in sequence along the optical axis from the object plane to the image plane. The object plane side of the first lens (11) is convex and the image plane side is concave. The object plane side of the second lens (12) is convex and the image plane side is concave. The object plane side of the third lens (13) is convex and the image plane side is concave. The object plane side of the fourth lens (14) is convex and the image plane side is convex. The object plane side of the fifth lens (15) is convex and the image plane side is convex. The object plane side of the sixth lens (16) is concave and the image plane side is convex. The fifth lens (15) and the sixth lens (16) are bonded together to form a first cemented lens. The second optical system is a wide-angle optical system, which includes a first lens (21), a second lens (22), a third lens (23), a fourth lens (24), a fifth lens (25), and a sixth lens (26) sequentially along the optical axis from the object plane to the image plane. The object plane side of the first lens (21) is flat and the image plane side is concave. The object plane side of the second lens (22) is concave and the image plane side is concave. The object plane side of the third lens (23) is convex. The image plane side is convex, the object plane side of the fourth lens (24) is convex and the image plane side is convex, the object plane side of the fifth lens (25) is concave and the image plane side is convex, the object plane side of the sixth lens (26) is convex and the image plane side is convex, the second lens (22) and the third lens (23) are bonded together to form a second cemented lens, and the fourth lens (24) and the fifth lens (25) are bonded together to form a third cemented lens.

2. The dual-lens vehicle-mounted camera module for preventing imaging errors according to claim 1, characterized in that: When the second camera (2) is installed in the second mounting slot (54), it is set vertically relative to the photosensitive chip (3). The second mounting slot (54) and the accommodating cavity (50) are connected through the second light channel (56). The light emitted from the second camera (2) is directly imaged onto the photosensitive chip (3) through the second light channel (56).

3. The dual-lens vehicle-mounted camera module for preventing imaging errors according to claim 1, characterized in that: The first photosensitive area (32) and the second photosensitive area (31) are separated by the reflector (4).

4. A dual-lens vehicle-mounted camera module for preventing imaging errors according to any one of claims 1-3, characterized in that: The angle between the first camera (1) and the second camera (2) is 30°-70°.

5. A focusing method for a dual-lens vehicle-mounted camera module for preventing imaging errors as described in any one of claims 1-4, characterized in that, Includes the following steps: After setting the reflector (4) and the photosensitive chip (3) at intervals and fixing their relative positions, the substrate (6) is fixed to the rear end of the base body (5); The second camera (2) is installed in the second mounting slot (54), and the position of the second camera (2) relative to the second photosensitive area (31) is adjusted so that the optical center of the second camera (2) coincides with the center of the second photosensitive area (31). After the adjustment is completed, the second camera (2) is fixed in the second mounting slot (54). The first camera (1) is assembled in the first mounting slot (55). The position of the first camera (1) relative to the first photosensitive area (32) is adjusted so that the optical center of the first camera (1) coincides with the center of the first photosensitive area (32) after being reflected by the reflector (4). After the adjustment is completed, the first camera (1) is fixed in the first mounting slot (55).

6. The focusing method for the dual-lens vehicle-mounted camera module for preventing imaging errors according to claim 5, characterized in that: The step "adjusting the position of the second camera (2) relative to the second photosensitive area (31) so that the optical center of the second camera (2) coincides with the center of the second photosensitive area (31)" specifically includes: Determine the preset center position of the second photosensitive area (31); Based on the optical center position of the second camera (2), determine the second offset between the optical center of the second camera (2) and the center of the second photosensitive area (31); Based on the second offset, the position of the second camera (2) relative to the substrate (6) is adjusted so that the optical center of the second camera (2) coincides with the center of the second photosensitive area (31).

7. The focusing method for the dual-lens vehicle-mounted camera module for preventing imaging errors according to claim 5, characterized in that: The step "adjusting the position of the first camera (1) relative to the first photosensitive area (32) so that the optical center of the first camera (1) coincides with the center of the first photosensitive area (32) after being reflected by the reflector (4)" specifically includes: Determine the preset center position of the first photosensitive area (32); Based on the optical center position of the first camera (1), determine the first offset between the optical center of the first camera (1) after reflection by the mirror (4) and the center of the first photosensitive area (32); Based on the first offset, the position of the first camera (1) relative to the substrate (6) is adjusted so that the optical center of the first camera (1) after being reflected by the mirror (4) coincides with the center of the first photosensitive area (32).

8. The focusing method for the dual-lens vehicle-mounted camera module for preventing imaging errors according to claim 5, characterized in that: "Fixing the substrate (6) to the rear end of the base body (5)" specifically includes: first, pre-positioning the substrate (6) at the rear side of the base body (5), and then locking the substrate (6) to the rear end of the base body (5) with screws.

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