Lens field angle detection device

Abstract

The utility model relates to a kind of lens field of view angle detection devices, including pedestal, its technical key points are: pedestal upper surface is equipped with center column, and is equipped with the carousel arranged around center column, multiple camera module positioning seats are evenly equipped on the upper surface edge of carousel, signal interface corresponding with the camera module positioning seat and being connected is equipped on the outer periphery of carousel, radial cantilever is fixed at the top of center column, longitudinal adjusting column is fixed at the free end of radial cantilever, cross field of view body is connected at the lower end of longitudinal adjusting column, cross field of view body is composed of arcuate first field of view board, arcuate second field of view board perpendicular to arcuate first field of view board, the center line of cross field of view body is perpendicular to the upper surface of carousel, the rotation path of camera module positioning seat passes through the center line of cross field of view body. The device significantly improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of camera field of view measurement technology, and specifically to a lens field of view detection device. Background Technology

[0002] The field of view (FOP) of a camera, also known as the camera's field of view, refers to the angle formed by the two edges of the lens of an optical instrument, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOP determines the field of view of the camera device; a larger FOP results in a wider field of view but a lower optical magnification. Detecting the FOP is one of the key performance indicators (KPIs) for cameras.

[0003] CN 223007600 U discloses a lens field of view detection device, which includes a vertical field of view scale and a horizontal field of view scale fixedly mounted on a mounting base plate. The mounting base plate has a cross-shaped plate structure. Both the vertical and horizontal field of view scales are arched structures and intersect each other perpendicularly. The inner bottom surface of the vertical field of view scale has vertical graduations, and the inner bottom surface of the horizontal field of view scale has horizontal graduations. The mounting base plate also has a lens positioning bracket for positioning and supporting the lens module, and when the lens module is set on the lens positioning bracket, its camera end is directly opposite the intersection of the vertical and horizontal field of view scales. This device is easy to operate, easy to assemble and disassemble, and easy to carry. However, it still has the following problems: there is only one lens positioning bracket, and only one lens module is tested at a time, resulting in low detection efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a lens field of view detection device with a reasonable structure and reliable operation that solves the above-mentioned problems and significantly improves detection efficiency.

[0005] The technical solution of this utility model is: A lens field of view detection device includes a base. The key technical features are: a central column is provided on the upper surface of the base, and a turntable is arranged around the central column. Multiple camera module positioning seats are evenly distributed along the edge of the upper surface of the turntable. Signal interfaces corresponding to and connected to the camera module positioning seats are provided on the outer circumference of the turntable. A radial cantilever is fixed to the top of the central column, and a longitudinal adjustment column is fixed to the free end of the radial cantilever. A cross-shaped field of view is connected to the lower end of the longitudinal adjustment column. The cross-shaped field of view consists of an arched first field of view plate and an arched second field of view plate perpendicular to the arched first field of view plate. The centerline of the cross-shaped field of view is perpendicular to the upper surface of the turntable. The rotation path of the camera module positioning seats passes through the centerline of the cross-shaped field of view. A first round flat column is provided at each of the two free ends of the arched first field of view plate, and a second round flat column is provided at each of the two free ends of the arched second field of view plate. An annular groove concentric with the turntable is provided on the upper surface of the turntable, with one of the first round flat columns and one of the adjacent second round flat columns located within the annular groove.

[0006] In the aforementioned lens field of view detection device, the inner width of the annular groove is equal to the outer diameter of the first and second circular flat cylinders.

[0007] In the aforementioned lens field of view detection device, the longitudinal adjustment column is a stud, and the stud is provided with an upper locking nut and a lower locking nut. The top surface of the cross-shaped field of view body is provided with a fixed cylinder connected to the lower end of the stud. The free end of the radial cantilever is provided with a radial U-shaped opening. The upper part of the stud is inserted into the radial U-shaped opening, and the upper locking nut and the lower locking nut clamp the radial cantilever between them.

[0008] In the aforementioned lens field of view detection device, the turntable is connected to the central column via a bearing, the upper surface of the base is provided with a support cylinder corresponding to the turntable, the lower surface of the turntable is provided with a concentric gear ring, the upper surface of the base is provided with a stepper motor, and the output shaft of the stepper motor is provided with a drive gear that meshes with the concentric gear ring.

[0009] In the aforementioned lens field of view detection device, the inner surfaces of the arched first field of view plate and the arched second field of view plate are respectively provided with detection scales.

[0010] The beneficial effects of this utility model are: In use, a turntable is used to rotate a camera module to the center position inside the cross-shaped field of view. After the detection is completed, the turntable rotates by a set angle, driving the next camera module to rotate to the center position inside the cross-shaped field of view for field angle detection. The above steps are repeated until all camera modules on the turntable are detected. After the detection of a camera module is completed, a replacement can be made, which significantly improves the detection efficiency. Attached Figure Description

[0011] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Top view; Figure 3 It is a top view of a cross-shaped field of view.

[0012] In the diagram: 1. Arched first field of view plate, 2. Radial cantilever, 3. Longitudinal adjustment column, 4. Upper locking nut, 5. Lower locking nut, 6. Fixing cylinder, 7. Arched second field of view plate, 8. Central column, 9. Turntable, 10. Annular groove, 11. Camera module positioning seat, 12. Concentric gear ring, 13. Support cylinder, 14. Base, 15. Stepper motor, 16. Drive gear, 17. Camera module to be tested, 18. Signal interface, 19. Second round flat column, 20. Radial U-shaped opening, 21. Detection scale, 22. First round flat column. Detailed Implementation

[0013] The present invention will be described in detail with reference to the accompanying drawings.

[0014] like Figures 1-3 As shown, the lens field of view detection device includes a base 14, a central column 8 on the upper surface of the base 14, and a turntable 9 arranged around the central column 8.

[0015] The turntable 9 has eight camera module positioning seats 11 evenly arranged on the upper surface edge, and the turntable 9 has signal interfaces 18 that correspond one-to-one with and are connected to the camera module positioning seats 11 on its outer circumference.

[0016] A radial cantilever 2 is fixed to the top of the central column 8, and a longitudinal adjusting column 3 is fixed to the free end of the radial cantilever 2. The lower end of the longitudinal adjusting column 3 is connected to a cross-shaped field of view. The cross-shaped field of view consists of an arched first field of view plate 1 and an arched second field of view plate 7 perpendicular to the arched first field of view plate 1. The inner surfaces of the arched first field of view plate 1 and the arched second field of view plate 7 are respectively provided with a detection scale 21. The center line of the cross-shaped field of view is perpendicular to the upper surface of the turntable 9, and the rotation path of the camera module positioning seat 11 passes through the center line of the cross-shaped field of view. The two free ends of the arched first field of view plate 1 are respectively provided with a first round flat column 22, and the two free ends of the arched second field of view plate 7 are respectively provided with a second round flat column 19. The upper surface of the turntable 9 is provided with an annular groove 10 concentric with it, and one of the first round flat columns 22 and one of the adjacent second round flat columns 19 are located in the annular groove 10.

[0017] In this embodiment, the inner width of the annular groove 10 is equal to the outer diameter of the first round flat column 22 and the second round flat column 19. The longitudinal adjusting column 3 is a stud, and the stud is provided with an upper locking nut 4 and a lower locking nut 5. The top surface of the cross-shaped field of view is provided with a fixing cylinder 6 connected to the lower end of the stud. The free end of the radial cantilever 2 is provided with a radial U-shaped opening 20. The upper part of the stud is inserted into the radial U-shaped opening 20, and the upper locking nut 4 and the lower locking nut 5 clamp the radial cantilever 2 therebetween. The turntable 9 is connected to the central column 8 by bearings. The upper surface of the base 14 is provided with a support cylinder 13 corresponding to the turntable 9. The lower surface of the turntable 9 is provided with a concentric gear ring 12. The upper surface of the base 14 is provided with a stepper motor 15. The output shaft of the stepper motor 15 is provided with a drive gear 16 that meshes with the concentric gear ring 12.

[0018] Working principle: 1. Install the eight camera modules 17 to be tested above the eight camera module positioning bases 11 respectively. In the initial state, the optical axis of the first camera module 17 to be tested coincides with the cross-shaped field of view.

[0019] 2. First, connect the detection cable so that the first camera module 17 to be tested is connected to the external image acquisition device through the signal interface 18. After the first camera module 17 to be tested is powered on, it takes a picture and captures the detection scale 21 on the inner surface of the cross-shaped field of view, thereby realizing the detection of the field of view angle.

[0020] 3. Start the stepper motor 15 to rotate the turntable 9 by 45 degrees, so that the next camera module 17 to be tested enters the cross-shaped field of view and its optical axis coincides with the center line of the cross-shaped field of view. After this camera module is powered on, it takes a picture to detect the field of view. After the first camera module is removed, the staff can replace it with a new camera module to be tested.

[0021] 4. Repeat the above steps to perform continuous testing.

[0022] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A lens field of view detection device, comprising a base, characterized in that: The base has a central column on its upper surface and a turntable arranged around the central column. Multiple camera module positioning seats are evenly distributed along the edge of the turntable's upper surface. Signal interfaces corresponding to and connected to each camera module positioning seat are provided on the outer circumference of the turntable. A radial cantilever is fixed to the top of the central column, and a longitudinal adjustment column is fixed to the free end of the radial cantilever. A cross-shaped field of view is connected to the lower end of the longitudinal adjustment column. The cross-shaped field of view consists of an arched first field of view plate and an arched second field of view plate perpendicular to the arched first field of view plate. The centerline of the cross-shaped field of view is perpendicular to the upper surface of the turntable. The rotation path of the camera module positioning seats passes through the centerline of the cross-shaped field of view. A first round flat column is provided at each of the two free ends of the arched first field of view plate, and a second round flat column is provided at each of the two free ends of the arched second field of view plate. An annular groove concentric with the turntable is provided on its upper surface, with one of the first round flat columns and one of the adjacent second round flat columns located within the annular groove.

2. The lens field of view detection device according to claim 1, characterized in that: The inner width of the annular groove is equal to the outer diameter of the first and second round flat cylinders.

3. The lens field of view detection device according to claim 1, characterized in that: The longitudinal adjustment column is a stud, and the stud is provided with an upper locking nut and a lower locking nut. The top surface of the cross-shaped field of view is provided with a fixed cylinder connected to the lower end of the stud. The free end of the radial cantilever is provided with a radial U-shaped opening. The upper part of the stud is inserted into the radial U-shaped opening, and the upper locking nut and the lower locking nut clamp the radial cantilever between them.

4. The lens field of view detection device according to claim 1, characterized in that: The turntable is connected to the central column by bearings. The upper surface of the base is provided with a support cylinder corresponding to the turntable. The lower surface of the turntable is provided with a concentric gear ring. The upper surface of the base is provided with a stepper motor. The output shaft of the stepper motor is provided with a drive gear that meshes with the concentric gear ring.

5. The lens field of view detection device according to claim 1, characterized in that: The inner surfaces of the arched first field of view and the arched second field of view are respectively provided with measuring scales.

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