Event camera comprehensive performance test light source device

Abstract

The utility model discloses a kind of event camera comprehensive performance test light source device, including double channel lamp plate, heat sink, mounting plate, light mixing plate, diffusion plate, middle frame, side plate, front cover, back cover and switch, the utility model is aimed at double channel lamp plate adopts double channel LED, light mixing plate is used to mix the LED light source of different color temperature, diffusion plate is used to convert the point light source of double channel LED into soft area light source, double channel lamp plate is diffused and mixed by light mixing plate and diffusion plate, form Lambert surface or the light field of custom distribution with illumination uniformity greater than 95%, which provides event camera with high consistency test environment without distortion and hot spot, without adopting multi-light source segmented test method, improve test efficiency, ensure the accuracy of imaging and test result.

Description

Technical Field

[0001] This utility model relates to the technical field of light source devices, and in particular to a light source device for comprehensive performance testing of an event camera. Background Technology

[0002] As an emerging visual sensor, event cameras operate by asynchronously outputting "event streams" of pixel coordinates, timestamps, and polarities. Their core characteristics include microsecond-level latency, high dynamic range, and low power consumption. Because event camera responses are based on dynamic changes in scene brightness rather than static image intensity, they have a dynamic range of up to 140dB. However, verifying this metric requires providing continuous, controllable light intensity stimuli from extremely dark to extremely bright in a single test. Traditional light source devices have limited dynamic range and cannot cover such a wide range of illumination, resulting in segmented and coarse testing. This makes it impossible to accurately determine the lower limit of sensitivity, upper limit of overexposure, and signal-to-noise ratio and adaptive switching characteristics of event cameras under different base illumination. Therefore, traditional uniform and constant light sources based on static test cards are no longer suitable for evaluating the performance of event cameras. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a light source device for comprehensive performance testing of an event camera, including a dual-channel light board, a heat sink, a mounting plate, a light mixing plate, a diffuser plate, a middle frame, side plates, a front cover, a rear cover, and a switch. The dual-channel light boards are arranged in an array on the middle frame. The middle frame has a heat sink on the back of the dual-channel light boards, and the heat sink is fixedly connected to a mounting plate for connecting an external circuit board. Side plates are connected around the middle frame, and the middle frame is detachably connected to the front cover and the rear cover through the side plates. A light mixing plate is fixedly connected to the middle frame, and a diffuser plate is provided on the front cover. The light emitted by the dual-channel light boards passes through the light mixing plate and the diffuser plate in sequence to generate a light field. The side plates are provided with a switch for controlling the dual-channel light boards.

[0004] The above technical solution employs dual-channel LEDs, with one channel using a high-intensity range of 100-80,000 lux and the other channel using a low-intensity range of 0.1-100 lux. A mixing plate is used to mix LED light sources of different color temperatures, and a diffuser plate is used to transform the point light source of the dual-channel LEDs into a soft surface light source. The dual-channel LEDs diffuse and mix light through the mixing plate and diffuser plate, forming a Lambertian surface or a customized light field with a uniform illumination of greater than 95%. This provides the event camera with a highly consistent testing environment free of distortion and hot spots, eliminating the need for multi-source segmented testing methods, improving testing efficiency, and ensuring the accuracy of imaging and testing results.

[0005] The present invention is further configured such that the middle frame has an inner folded surface, the heat sink is threaded to the middle frame through the inner folded surface, and the dual-channel lamp plate and the mounting plate are respectively threaded to the front and rear sides of the heat sink.

[0006] Furthermore, the heat sink is provided with threaded hole one, threaded hole two and threaded hole three, the inner folded surface one is provided with countersunk hole corresponding to threaded hole one, and the dual-channel lamp plate and mounting plate are provided with through hole one and through hole two corresponding to threaded hole two and threaded hole three.

[0007] Furthermore, the dual-channel lamp board is provided with a wiring terminal, and the heat sink is provided with an opening slot corresponding to the wiring terminal.

[0008] Furthermore, heat dissipation fins are provided on the back of the heat sink.

[0009] Using the above technical solution, the middle frame, side panels, front cover and rear cover are all integrally bent sheet metal parts and combined to form a metal shell structure. The dual-channel lamp panel is distributed in an array at the middle frame through the heat sink. The heat sink increases the heat dissipation area through heat dissipation fins, and the heat sink is connected to the external metal shell through the middle frame to improve the overall heat dissipation effect of the light source device.

[0010] The present invention is further configured such that the middle frame includes a white frame and a light-shielding frame, the white frame has an outwardly turned surface one and an outwardly turned surface two, the outer side of the light-shielding frame has an outwardly turned surface three corresponding to the outwardly turned surface two, the light-shielding frame is threaded to the white frame through the outwardly turned surface two, the light mixing plate is snapped between the white frame and the light-shielding frame, the diffuser plate is snapped between the front cover and the white frame, the inner side of the light-shielding frame has the inner folded surface one, and the light-emitting surface of the dual-channel lamp panel faces the direction of the white frame.

[0011] Furthermore, the side plate is provided with an inner folded surface two corresponding to the outer folded surface one, and the side plate is fixedly connected to the white frame through the outer folded surface one.

[0012] Furthermore, the first and second outward-facing surfaces are provided with rivet nuts.

[0013] Using the above technical solution, the light-shielding frame is used to prevent light leakage from the dual-channel lamp panel light source. The white frame is placed between the mixing plate and the diffuser plate, and the surface of the white frame is coated with a high reflectivity coating to form a rectangular cavity with high reflectivity on all sides, which is conducive to the mixing and emission of light sources.

[0014] The present invention is further configured such that the side plate has stepped surfaces on both sides, the front cover and the rear cover are snapped onto the side plate through the stepped surfaces, and the stepped surfaces are provided with threaded holes for fixing the front cover and the rear cover.

[0015] By adopting the above technical solution, the side plate is formed into a stepped surface by integral bending, and the height of the stepped surface is the same as the thickness of the front cover or the rear cover. This makes the side plate form a regular rectangular frame structure after installation with the front cover or the rear cover, thus improving the overall aesthetics of the light source device.

[0016] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is the utility model Figure 3 A magnified view of the central A-direction view; Figure 5 This is a front view of the heat sink of this utility model; Figure 6 This is a perspective view of the dual-channel lamp panel of this utility model; Figure 7 This is a perspective view of the mounting plate of this utility model; Figure 8 This is an exploded view of the middle frame structure of this utility model; Figure 9 This is the utility model Figure 3 A magnified view of the central B-direction view; Among them: 1-Dual channel lamp board, 2-Heat dissipation plate, 3-Mounting plate, 4-Light mixing plate, 5-Diffuser plate, 6-Middle frame, 7-Side plate, 8-Front cover, 9-Rear cover, 10-Switch, 11-Wire terminal, 12-Through hole one, 21-Threaded hole one, 22-Threaded hole two, 23-Threaded hole three, 24-Heat dissipation fins, 31-Through hole two, 61-Inner fold surface one, 62-Counterhead hole, 63-White frame, 64-Light shielding frame, 65-Outer fold surface one, 66-Outer fold surface two, 67-Outer fold surface three, 68-Rivet nut, 71-Inner fold surface two, 72-Step surface, 73-Threaded hole four; Detailed Implementation The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0018] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the intentions or conventions of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0019] like Figure 1As shown, this utility model discloses a light source device for comprehensive performance testing of an event camera, including a dual-channel light board 1, a heat sink 2, a mounting plate 3, a light mixing plate 4, a diffuser plate 5, a middle frame 6, side plates 7, a front cover 8, a rear cover 9, and a switch 10. The dual-channel light boards 1 are arranged in an array on the middle frame 6. The middle frame 6 is located on the back of the dual-channel light boards 1 and has a heat sink 2. The heat sink 2 is fixedly connected to the mounting plate 3 for connecting an external circuit board. The middle frame 6 is connected to the side plates 7 around its perimeter. The middle frame 6 is detachably connected to the front cover 8 and the rear cover 9 through the side plates 7. The light mixing plate 4 is fixedly connected to the middle frame 6. The front cover 8 has a diffuser plate 5. The light emitted by the dual-channel light boards 1 passes through the light mixing plate 4 and the diffuser plate 5 in sequence to generate a light field. The side plate 7 has a switch 10 for controlling the dual-channel light boards 1.

[0020] In this embodiment, the middle frame 6 has an inner folded surface 61. The heat sink 2 is threaded to the middle frame 6 through the inner folded surface 61. The dual-channel lamp panel 1 and the mounting plate 3 are threaded to the front and rear sides of the heat sink 2, respectively. The heat sink 2 has a threaded hole 21, a threaded hole 22, and a threaded hole 23. The inner folded surface 61 has a countersunk hole 62 corresponding to the threaded hole 21. The dual-channel lamp panel 1 and the mounting plate 3 have through holes 12 and 31 corresponding to the threaded holes 22 and 33, respectively. The mounting plate 3 is used to install the corresponding dual-channel lamp panel 1. The drive circuit board and control circuit board are provided. The dual-channel lamp board 1 is provided with a terminal 11. The heat sink 2 is provided with an opening slot corresponding to the terminal 11. The back of the heat sink 2 is provided with heat dissipation fins 24. The middle frame 6, side plate 7, front cover 8 and rear cover 9 are all integrally bent sheet metal parts and combined to form a metal shell structure. The dual-channel lamp board 1 is located in the middle frame 6 in an array through the heat sink 2. The heat sink 2 increases the heat dissipation area through the heat dissipation fins 24. The heat sink 2 is connected to the external metal shell through the middle frame 6 to improve the overall heat dissipation effect of the light source device.

[0021] In this embodiment, the middle frame 6 includes a white frame 63 and a light-shielding frame 64. The white frame 63 has an outward-facing surface 65 and an outward-facing surface 66. The outer side of the light-shielding frame 64 has an outward-facing surface 67 corresponding to the outward-facing surface 66. The light-shielding frame 64 is threaded to the white frame 63 through the outward-facing surface 66. The light-mixing plate 4 is snapped between the white frame 63 and the light-shielding frame 64. The diffuser plate 5 is snapped between the front cover 8 and the white frame 63. The inner side of the light-shielding frame 64 has an inward-folding surface 61. The light-emitting surface of the dual-channel lamp panel 1... Facing the white frame 63, the side plate 7 has an inner folded surface 71 corresponding to the outer folded surface 65. The side plate 7 is fixedly connected to the white frame 63 through the outer folded surface 65. The outer folded surface 65 and the outer folded surface 66 are provided with rivet nuts 68. The light-shielding frame 64 is used to prevent light leakage from the light source of the dual-channel lamp plate 1. The white frame 63 is located between the light mixing plate 4 and the diffuser plate 5, and the surface of the white frame 63 is coated with a high reflectivity coating to form a rectangular cavity with high reflectivity on all sides, which is conducive to the mixing and emission of light sources.

[0022] In this embodiment, the side plate 7 has stepped surfaces 72 on both sides. The front cover 8 and the rear cover 9 are snapped onto the sides of the side plate 7 through the stepped surfaces 72. The stepped surfaces 72 are provided with threaded holes 73 for fixing the front cover 8 and the rear cover 9. The side plate 7 forms the stepped surfaces 72 by integral bending. The height H of the stepped surfaces 72 is the same as the thickness T of the front cover 8 or the rear cover 9. This makes the side plate 7 form a regular rectangular frame structure after it is installed with the front cover 8 and the rear cover 9, which improves the overall aesthetics of the light source device.

[0023] The working principle of this utility model is as follows: the dual-channel light board 1 uses dual-channel LEDs, one channel uses a high light intensity range of 100-80,000 lux, and the other channel uses a low light intensity range of 0.1-100 lux with low noise. The mixing plate 4 is used to mix LED light sources of different color temperatures, and the diffuser plate 5 is used to convert the point light source of the dual-channel LEDs into a soft surface light source. The dual-channel light board 1 is controlled by a rocker switch 10. The dual-channel light board 1 diffuses and mixes light through the mixing plate 4 and the diffuser plate 5 to form a Lambertian surface or a customized light field with a uniform illumination of greater than 95%. This provides the event camera with a highly consistent testing environment without distortion or hot spots, ensuring the accuracy of imaging and testing results.

[0024] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A light source device for comprehensive performance testing of an event camera, characterized in that, The device includes a dual-channel lamp panel (1), a heat sink (2), a mounting plate (3), a light mixing plate (4), a diffuser plate (5), a middle frame (6), a side plate (7), a front cover (8), a rear cover (9), and a switch (10). The dual-channel lamp panel (1) is arranged in an array on the middle frame (6). The middle frame (6) is located on the back of the dual-channel lamp panel (1) and has a heat sink (2). The heat sink (2) is fixedly connected to a mounting plate (3) for connecting an external circuit board. The middle frame (6) is connected to the side plate (7) around its perimeter. The middle frame (6) is detachably connected to the front cover (8) and the rear cover (9) through the side plate (7). The middle frame (6) is fixedly connected to the light mixing plate (4). The front cover (8) has a diffuser plate (5). The light emitted by the dual-channel lamp panel (1) passes through the light mixing plate (4) and the diffuser plate (5) in sequence to generate a light field. The side plate (7) has a switch (10) for controlling the dual-channel lamp panel (1).

2. The event camera comprehensive performance testing light source device according to claim 1, characterized in that: The middle frame (6) is provided with an inner folded surface (61), and the heat sink (2) is threaded to the middle frame (6) through the inner folded surface (61). The dual-channel lamp plate (1) and the mounting plate (3) are respectively threaded to the front and rear sides of the heat sink (2).

3. The event camera comprehensive performance testing light source device according to claim 2, characterized in that: The heat sink (2) is provided with threaded hole one (21), threaded hole two (22) and threaded hole three (23), the inner folded surface one (61) is provided with countersunk hole (62) corresponding to threaded hole one (21), and the dual-channel lamp plate (1) and mounting plate (3) are provided with through hole one (12) and through hole two (31) corresponding to threaded hole two (22) and threaded hole three (23).

4. The event camera comprehensive performance testing light source device according to claim 3, characterized in that: The dual-channel lamp board (1) is provided with a terminal (11), and the heat sink (2) is provided with an opening slot corresponding to the terminal (11).

5. The event camera comprehensive performance testing light source device according to claim 4, characterized in that: The heat sink (2) has heat dissipation fins (24) on its back side.

6. The event camera comprehensive performance testing light source device according to claim 2, characterized in that: The middle frame (6) includes a white frame (63) and a light-shielding frame (64). The white frame (63) is provided with an outward flip surface one (65) and an outward flip surface two (66). The outer side of the light-shielding frame (64) is provided with an outward flip surface three (67) corresponding to the outward flip surface two (66). The light-shielding frame (64) is threaded to the white frame (63) through the outward flip surface two (66). The light mixing plate (4) is snapped between the white frame (63) and the light-shielding frame (64). The diffuser plate (5) is snapped between the front cover (8) and the white frame (63). The inner side of the light-shielding frame (64) is provided with the inner fold surface one (61). The light-emitting surface of the dual-channel lamp plate (1) faces the white frame (63).

7. The event camera comprehensive performance testing light source device according to claim 6, characterized in that: The side plate (7) is provided with an inner folded surface (71) corresponding to the outer folded surface (65), and the side plate (7) is fixedly connected to the white frame (63) through the outer folded surface (65).

8. The event camera comprehensive performance testing light source device according to claim 7, characterized in that: The first outward-facing surface (65) and the second outward-facing surface (66) are provided with rivet nuts (68).

9. The event camera comprehensive performance testing light source device according to claim 1, characterized in that: The side plate (7) has stepped surfaces (72) on both sides. The front cover (8) and the rear cover (9) are snapped onto the sides of the side plate (7) through the stepped surfaces (72). The stepped surfaces (72) have four threaded holes (73) for fixing the front cover (8) and the rear cover (9).

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