Adjustable optical axis structure of fixed-focus dual camera

Abstract

The utility model relates to a kind of adjustable optical axis structure of fixed-focus dual camera, including visible light camera, ultraviolet camera, left-right adjusting knob, adjusting fixed screw and main body fixing frame, the visible light camera and ultraviolet camera are arranged in parallel;Wherein, the visible light camera is connected with the main body fixing frame;The front end of the ultraviolet camera is connected with the main body fixing frame by adjusting fixed screw, for rotating one point of fixed optical axis;While the rear end of the ultraviolet camera is connected with left-right adjusting knob, for adjusting another point of fixed optical axis.This adjustable optical axis structure of fixed-focus dual camera removes motor control system and spectroscope system, realizes low processing cost by manually adjusting camera optical axis parallelism, technical realization simplification, assembly calibration process simplification, overall structure volume size reduction.

Description

Technical Field

[0001] This utility model belongs to the field of ultraviolet optical imaging technology, and in particular relates to an adjustable optical axis structure for a fixed-focus dual camera. Background Technology

[0002] The adjustable optical axis structure of dual cameras is a technology that is gaining increasing attention in various fields such as machine vision, robotics, autonomous driving, and drones. This structure allows users to adjust the optical axes of the two cameras at any time according to their needs, thereby achieving more flexible image processing capabilities. At the production and assembly level, it reduces the cumbersome procedures and processes caused by calibration, and at the image algorithm calibration level, it reduces the calibration difficulty coefficient.

[0003] Chinese patent document CN119211520A discloses a high-precision calibration method for a dual-camera galvanometer gimbal. For a dual-camera galvanometer gimbal consisting of a high-magnification camera, a galvanometer, and a wide-angle camera, a coarse model of the galvanometer angle mapping relationship is first performed to construct a simplified model (e.g., ...). Figure 4 (As shown in the figure). Then, geometric optics modeling and simulation are performed in a computer to visualize the optical path of the galvanometer-type gimbal and obtain the galvanometer deviation. The galvanometer deviation is used to compensate for errors in the simplified model to obtain a more accurate galvanometer angle mapping relationship. This is then processed in a practical application to obtain the galvanometer angle in the dual-camera galvanometer-type gimbal. This existing technology achieves high-precision calibration of the dual-camera galvanometer-type gimbal system, enabling high-precision target positioning and accurate estimation of target positioning errors under different optical configurations. However, this existing technology requires coarse modeling through galvanometer angle mapping relationships followed by fine modeling through optical simulation, making the assembly and calibration process relatively complex. Because the galvanometer has a motor control system, its implementation cost is relatively high, and the control method is complex. Furthermore, because the galvanometer system consists of left-right rotating galvanometers and pitch rotating galvanometers, its structural layout is large, and the structural processing cost is relatively high.

[0004] Existing technical solutions use a motor system to control the angle of the beam splitter, thereby changing the optical path. Since the angle of the two beam splitters needs to be changed, two sets of motors are required to control them separately. This results in high processing costs, complex optical paths, complex control methods, and large overall structural dimensions.

[0005] Therefore, it is necessary to develop a new adjustable optical axis structure for fixed-focus dual cameras. By manually adjusting the parallelism of the camera's optical axis, low processing costs can be achieved, the technology can be simplified, the assembly and calibration process can be simplified, and the overall structural size can be reduced. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable optical axis structure for a fixed-focus dual camera, which eliminates the beam splitter system and achieves low processing costs by manually adjusting the parallelism of the camera's optical axis. This simplifies the technical implementation, simplifies the assembly and calibration process, and thus reduces the size of the entire dual-camera system and the overall structural volume.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is that the adjustable optical axis structure of the fixed-focus dual camera includes a visible light camera, an ultraviolet camera, a left and right adjustment knob, an adjustment fixing screw, and a main body fixing frame, wherein the visible light camera and the ultraviolet camera are arranged in parallel; wherein the visible light camera is connected to the main body fixing frame; The front end of the ultraviolet camera is connected to the main frame via an adjusting screw, which is used to rotate one point of the fixed optical axis; at the same time, the rear end of the ultraviolet camera is connected to a left and right adjustment knob, which is used to adjust another point of the fixed optical axis.

[0008] Using the above technical solution, the visible light camera and the main mounting bracket can be regarded as a rigid body. The front end of the ultraviolet camera is equipped with an adjustment and fixing screw, and the rear end is equipped with a left and right adjustment knob. The front end is equipped with a fixing screw to enable rotation of one point of the fixed optical axis; the rear end is equipped with a left and right adjustment knob to enable adjustment of another point of the fixed optical axis. This allows for manual adjustment of the parallelism of the camera's optical axis, reducing processing costs, simplifying the technical implementation, simplifying the assembly and calibration process, and reducing the overall structural size.

[0009] The ultimate goal of manually adjusting the parallelism of the camera's optical axis by adjusting the fixing screw and the left and right adjustment knobs is to achieve image fusion. The key to image fusion is the parallelism of the optical axes of the two cameras. The adjustable optical axis structure of this fixed-focus dual camera is an assembly with non-compliant form and position tolerances when it leaves the factory. After the cameras are assembled, the difference can be seen by looking at the fused image (observing how many pixels are different in the horizontal direction, while the vertical direction has been guaranteed by machining tolerances). The pixel error in the horizontal direction can be compensated by manually rotating the knobs, thereby ensuring the final form and position tolerances.

[0010] Furthermore, the ultraviolet camera is connected to the main body bracket via a camera mount.

[0011] Furthermore, the camera mount includes a front camera mount and a rear camera mount. The front camera mount connects the ultraviolet camera to the main body mount via adjusting fixing screws, and the left and right adjustment knobs are located on the rear camera mount.

[0012] Furthermore, the adjustable optical axis structure also includes a sheet metal housing, within which both the visible light camera and the ultraviolet camera are housed. The sheet metal housing engages with the rear camera mount via a left-right adjustment knob. The left-right adjustment knob passes through the sheet metal housing and connects to the rear camera mount. This configuration allows the ultraviolet camera to rotate in a circular motion around the adjustment screw when the left-right adjustment knob is rotated forward or backward. The left-right adjustment knob uses a hand-tightening nut, allowing for convenient manual adjustment by the user.

[0013] Furthermore, an adjusting spring is provided between the left and right adjustment knob and the rear camera mounting bracket. The adjusting spring increases the tension between the left and right adjustment knob and the surface of the sheet metal housing, thus enabling adjustment at another point on the optical axis.

[0014] Furthermore, the front-end camera mounting bracket includes an upper front-end camera mounting bracket and a lower front-end camera mounting bracket, which clamp the ultraviolet camera and are connected by structural fixing screws; the rear-end camera mounting bracket includes an upper rear-end camera mounting bracket and a lower rear-end camera mounting bracket, which clamp the ultraviolet camera and are connected by structural fixing screws.

[0015] Preferably, the sheet metal housing has a through hole on its surface, and the left and right adjustment knob passes through the through hole and is connected to the lower part of the rear camera mounting bracket.

[0016] Preferably, the through holes on the surface of the sheet metal housing are gap holes or strip holes.

[0017] Furthermore, the adjustable optical axis structure also includes PCB control board one, PCB control board two, and PCB control board three. PCB control board one is connected to PCB control board three and is also connected to the rear end of the ultraviolet camera through a PCB fixing plate. PCB control board two is fixed to the sheet metal housing through a PCB sheet metal fixing plate.

[0018] Preferably, the sheet metal housing includes an upper sheet metal housing and a lower sheet metal housing, which are connected to form a space for accommodating the ultraviolet camera and the visible light camera.

[0019] Compared with the prior art, the adjustable optical axis structure of the fixed-focus dual camera of this utility model has the following advantages: 1) The adjustable optical axis structure of this fixed-focus dual camera eliminates the beam splitter system and adds a horizontal optical axis adjustment system, thereby increasing the proportion of standard parts in the design and reducing production costs.

[0020] 2) The adjustable optical axis structure of this fixed-focus dual camera has no motor control system and beam splitter system. By manually adjusting the parallelism of the camera optical axis, it achieves low processing cost, simplifies the technical implementation, simplifies the assembly and calibration process, and thus reduces the size of the entire dual camera system and the overall structural volume. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the adjustable optical axis structure of the fixed-focus dual camera of this utility model. Figure 1 ; Figure 2 This is an exploded view of the overall structure of the adjustable optical axis of the fixed-focus dual camera of this utility model. Figure 3 This is a schematic diagram of the adjustable optical axis structure of the fixed-focus dual camera of this utility model. Figure 2 ; Figure 4 It is the optical path diagram of the dual-camera galvanometer gimbal in the existing Chinese patent document CN119211520A; Wherein: 1-Visible light camera; 2-Ultraviolet camera; 3-Left and right adjustment knob; 4-Adjustment fixing screw; 5-PCB fixing sheet metal; 6-Structural fixing screw; 7-Sheet metal shell; 701-Sheet metal upper shell; 702-Sheet metal lower shell; 703-Through hole; 8-PCB fixing board; 9-PCB control board one; 10-Adjustment spring; 11-Screw post; 12-Main body fixing frame; 13-Front-end camera fixing frame; 1301-Front-end camera fixing frame upper; 1302-Front-end camera fixing frame lower; 14-PCB control board two; 15-PCB control board three; 16-Rear-end camera fixing frame; 1601-Rear-end camera fixing frame upper; 1602-Rear-end camera fixing frame lower. Detailed Implementation

[0022] The present technical solution will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-3 As shown, the adjustable optical axis structure of this utility model's fixed-focus dual camera includes a visible light camera 1, an ultraviolet camera 2, a left-right adjustment knob 3, and an adjustment fixing screw 4 and a main body fixing frame 12. The visible light camera 1 and the ultraviolet camera 2 are arranged in parallel. The visible light camera 1 is connected to the main body fixing frame 12. The front end of the ultraviolet camera 1 is connected to the main body fixing frame 12 through the adjustment fixing screw 4, which is used to rotate one point of the fixed optical axis. At the same time, the rear end of the ultraviolet camera 2 is connected to the left-right adjustment knob 3, which is used to adjust the other point of the fixed optical axis. The ultraviolet camera 2 is connected to the main body fixing frame 12 through a camera fixing frame.

[0024] The camera mount includes a front camera mount 13 and a rear camera mount 16. The front camera mount 13 connects the ultraviolet camera 2 to the main body mount 12 via adjusting fixing screws 4. The left and right adjustment knobs 3 are located on the rear camera mount 16. The adjustable optical axis structure also includes a first PCB control board 9, a second PCB control board 14, and a third PCB control board 15. The first PCB control board 9 is connected to the third PCB control board 14 and is connected to the rear end of the ultraviolet camera 2 via a PCB fixing plate 8 and screw posts 11. The second PCB control board 14 is fixed to the sheet metal housing 7 via a PCB sheet metal fixing plate 5.

[0025] like Figure 2 As shown, the adjustable optical axis structure also includes a sheet metal housing 7, within which both the visible light camera 1 and the ultraviolet camera 2 are housed. The sheet metal housing 7 is connected to the rear camera mounting bracket 16 via a left-right adjustment knob 3. The left-right adjustment knob 3 passes through the sheet metal housing 7 and connects to the rear camera mounting bracket 12. This configuration allows the ultraviolet camera 2 to rotate in a circular motion around the adjustment screw 4 when the left-right adjustment knob is rotated forward or backward. The left-right adjustment knob 3 is a hand-tightening nut, allowing for convenient manual adjustment by the user.

[0026] The left and right adjustment knob 3 is provided with an adjustment spring 10 between the sheet metal housing 7 and the rear camera mounting bracket 16. The adjustment spring 10 increases the tension between the left and right adjustment knob 3 and the surface of the sheet metal housing 7, thus enabling the optical axis to be adjusted at another point.

[0027] The ultraviolet camera 2 mounting bracket is divided into two sets, namely the front camera mounting bracket 13 and the rear camera mounting bracket 16. The front camera mounting bracket 13 is connected to the main mounting bracket 12 by adjusting the fixing screw 4, which serves to fix one point of the optical axis and allow it to rotate.

[0028] The lower rear camera mount 1602 of the ultraviolet camera 2 is connected to the sheet metal housing 7 via a left-right adjustment knob 3. A threaded hole is provided on the side of the lower rear camera mount 1602. The left-right adjustment knob 3 passes through the through hole 703 on the surface of the sheet metal housing 7 and is connected to the threaded hole of the lower rear camera mount 1602. An adjustment spring 10 is provided between the left-right adjustment knob 3 and the sheet metal housing 7 to increase the tension between the left-right adjustment knob 3 and the surface of the sheet metal housing 7, which serves to make the optical axis adjustable at another point.

[0029] The front-end camera mount 13 includes an upper front-end camera mount 1301 and a lower front-end camera mount 1302. The upper front-end camera mount 1301 and the lower front-end camera mount 1302 clamp the ultraviolet camera 2 and are connected by structural fixing screws 6. The rear-end camera mount 16 includes an upper rear-end camera mount 1601 and a lower rear-end camera mount 1602. The upper rear-end camera mount 1601 and the lower rear-end camera mount 1602 clamp the ultraviolet camera 2 and are connected by structural fixing screws 6.

[0030] The upper 1301 and lower 1302 of the front-end camera mounting bracket form a mounting bracket assembly that acts as a clamp to fix the ultraviolet camera 2. The ultraviolet camera 2 is structurally clamped and locked by the structural fixing screws 6. Similarly, the upper 1601 and lower 1602 of the rear-end camera mounting bracket form a mounting bracket assembly that acts as a clamp to fix the ultraviolet camera 2. The ultraviolet camera 2 is structurally clamped and locked by the structural fixing screws 6.

[0031] In some specific embodiments, the surface of the lower 1302 of the front-end camera mounting bracket is provided with threaded holes, and the lower 1302 of the front-end camera mounting bracket is connected to the main mounting bracket 12 by passing through the through holes with large gaps on the surface of the main mounting bracket 12 with structural fixing screws 6.

[0032] The sheet metal housing 7 has a through hole 703 on its surface, and the left and right adjustment knob 3 passes through the through hole 703 and is connected to the lower 1602 of the rear camera mounting bracket. The sheet metal housing 7 includes a sheet metal upper shell 701 and a sheet metal lower shell 702, which are connected to form a space to accommodate the ultraviolet camera 2 and the visible light camera 1.

[0033] In some specific embodiments, the through hole 703 on the surface of the sheet metal housing 7 is a gap hole or a strip hole. Because the camera uses fine adjustment, the through hole 703 on the surface of the sheet metal housing 7 is a gap hole. If required, it can be made into a strip hole, which facilitates large-scale adjustment of the ultraviolet camera 2.

[0034] The flatness tolerance of the upper surface of the main mounting bracket 12 (the contact surface with the lower surface of the front camera mounting bracket 1302) is set to 0.05, and the flatness tolerance of the lower surface of the lower surface of the front camera mounting bracket 1302 (the contact surface with the main mounting bracket 12) is also set to 0.05. This eliminates the need to adjust the pitch angle of the ultraviolet camera during installation. The same applies to the rear camera mounting bracket.

[0035] In summary, when the factory assembles the system or the user uses the fixed-focus dual-camera system, turning the left and right adjustment knob 3 clockwise causes the UV camera 2 to rotate counterclockwise, and turning it counterclockwise causes it to rotate clockwise, thus achieving horizontal rotation of the UV camera 2. Since the visible light camera 1 and the main mounting bracket 12 are connected by threads, they can be considered as a single rigid body. The optical axis of the visible light camera 1 remains fixed. Adjusting the left and right adjustment knob 3 makes the optical axis of the UV camera 2 parallel to the optical axis of the visible light camera 1 in the horizontal direction. After the horizontal adjustment is completed, tightening the structural fixing screw 6 ensures that the two 0.05 flatness surfaces of the front camera mounting bracket 1302 and the main mounting bracket 12 are tightly fitted, thus achieving vertical optical axis parallelism.

[0036] Because the flatness of the workpiece surface ensures the parallelism of the optical axis in the pitch direction during the assembly process, subsequent production personnel can adjust the horizontal optical axis parallelism by rotating the knob, which greatly reduces the time workers spend assembling optical parts, improves assembly efficiency, and thus reduces costs and simplifies assembly calibration.

[0037] By eliminating the beam splitter system, the overall size of the dual-camera system was reduced.

[0038] The structural fixing screws 6, adjusting fixing screws 4, slotted screws and adjusting springs 10 used in the design are all standard parts, thereby increasing the proportion of standard parts in the design and reducing processing costs.

[0039] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model, such as changing the number of lamps, should be included within the protection scope of this utility model.

Claims

1. An adjustable optical axis structure for a fixed-focus dual-camera system, characterized in that, The device includes a visible light camera, an ultraviolet camera, a left and right adjustment knob, an adjustment and fixing screw, and a main body mounting frame. The visible light camera and the ultraviolet camera are arranged in parallel. The visible light camera is connected to the main body mounting frame. The front end of the ultraviolet camera is connected to the main frame via an adjusting screw, which is used to rotate one point of the fixed optical axis; at the same time, the rear end of the ultraviolet camera is connected to a left and right adjustment knob, which is used to adjust another point of the fixed optical axis.

2. The adjustable optical axis structure of the fixed-focus dual camera according to claim 1, characterized in that, The ultraviolet camera is connected to the main body bracket via a camera mount.

3. The adjustable optical axis structure of the fixed-focus dual camera according to claim 2, characterized in that, The camera mount includes a front camera mount and a rear camera mount. The front camera mount connects the ultraviolet camera to the main body mount by adjusting the fixing screws. The left and right adjustment knobs are located on the rear camera mount.

4. The adjustable optical axis structure of the fixed-focus dual camera according to claim 3, characterized in that, The adjustable optical axis structure also includes a sheet metal housing, in which both the visible light camera and the ultraviolet camera are housed; the left and right adjustment knobs pass through the sheet metal housing and are connected to the rear camera mounting bracket.

5. The adjustable optical axis structure of the fixed-focus dual camera according to claim 4, characterized in that, The left and right adjustment knobs are provided with an adjustment spring between the sheet metal housing and the rear camera mounting bracket.

6. The adjustable optical axis structure of the fixed-focus dual camera according to claim 4, characterized in that, The front-end camera mounting bracket includes an upper front-end camera mounting bracket and a lower front-end camera mounting bracket. The upper and lower front-end camera mounting brackets clamp the ultraviolet camera and are connected by structural fixing screws. The rear-end camera mounting bracket includes an upper rear-end camera mounting bracket and a lower rear-end camera mounting bracket. The upper and lower rear-end camera mounting brackets clamp the ultraviolet camera and are connected by structural fixing screws.

7. The adjustable optical axis structure of the fixed-focus dual camera according to claim 6, characterized in that, The surface of the sheet metal housing is provided with a through hole, and the left and right adjustment knob passes through the through hole and is connected to the lower part of the rear camera mounting bracket.

8. The adjustable optical axis structure of the fixed-focus dual camera according to claim 7, characterized in that, The through holes on the surface of the sheet metal housing are gap holes or strip holes; the adjusting and fixing screws are flathead plug screws.

9. The adjustable optical axis structure of the fixed-focus dual camera according to claim 6, characterized in that, The adjustable optical axis structure also includes PCB control board one, PCB control board two, and PCB control board three. PCB control board one is connected to PCB control board three and is also connected to the rear end of the ultraviolet camera through a PCB fixing plate. PCB control board two is fixed to the sheet metal housing through a PCB sheet metal fixing plate.

10. The adjustable optical axis structure of the fixed-focus dual camera according to claim 6, characterized in that, The sheet metal housing includes an upper sheet metal shell and a lower sheet metal shell, which are connected to form a space to accommodate the ultraviolet camera and the visible light camera.

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