Reflection-type near-infrared light source box

Abstract

The utility model discloses a reflection-type near-infrared light source box, which comprises a test box, a mobile module, a target plate and a light source module, and is characterized in that the test box is provided with a test cavity; the moving module comprises a second moving mechanism, and the second moving mechanism can be used for mounting the to-be-tested camera and can drive the to-be-tested camera to perform position adjustment in the test cavity; the target plate is arranged in the test cavity, and the target plate is located in an image acquisition range of the to-be-tested camera; the light source module is arranged in the test cavity, the light source module comprises near-infrared lamp beads, the light source module is used for emitting light to the target plate, and the camera to be tested can obtain image information of the target plate under irradiation of the light source module. According to the utility model, the camera test in a near-infrared light illumination environment can be realized, and the test position of the camera can be conveniently adjusted.

Description

Technical Field

[0001] This utility model relates to the field of camera testing equipment technology, and in particular to a reflective near-infrared light source box. Background Technology

[0002] Camera imaging performance varies significantly under different lighting conditions. For cameras that need to handle nighttime video recording, such as area camera modules, nighttime monitoring requires adaptation to both visible light and concealed modes. The visible light mode uses visible light illumination, while the concealed mode uses near-infrared light illumination. Current technology for testing the imaging performance of area camera modules involves placing the test object in a designated location and then using the camera module to observe its image quality. This testing is conducted under visible light conditions and cannot meet the requirements for testing cameras under near-infrared illumination, meaning it cannot simulate testing camera modules under near-infrared illumination in concealed mode. Furthermore, current camera testing technologies do not allow for convenient adjustment of the camera's position, resulting in low testing convenience. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a reflective near-infrared light source box, enabling camera testing under near-infrared illumination, and facilitating adjustment of the camera's testing position.

[0004] A reflective near-infrared light source box according to an embodiment of the present invention includes:

[0005] The test chamber is equipped with a test cavity;

[0006] The mobile module includes a second mobile mechanism, which can mount the camera under test and can move the camera under test to adjust its position within the test chamber.

[0007] The target plate is set inside the test cavity and is located within the image acquisition range of the camera under test;

[0008] The light source module is set inside the test chamber. The light source module includes near-infrared lamp beads and is used to emit light onto the target plate. The camera under test can acquire image information of the target plate under the illumination of the light source module.

[0009] A reflective near-infrared light source box according to an embodiment of the present utility model has at least the following beneficial effects:

[0010] After the camera under test is installed on the second moving mechanism, it emits near-infrared light through the near-infrared LEDs on the light source module. The near-infrared light is reflected on the inner surface of the test chamber, creating a near-infrared illumination environment within the test cavity to enable camera testing under near-infrared illumination. The near-infrared light shines onto the target plate and is reflected. A portion of the near-infrared light reflected from the target plate enters the camera lens of the camera under test, achieving image imaging under near-infrared illumination. By changing the position of the second moving mechanism, the position of the camera under test can be easily adjusted, allowing the camera to be placed in different positions within the test cavity for testing. This enables testing of the camera under test against the light reflected from the target plate at different test positions and distances, making it widely applicable and suitable for various testing environments.

[0011] According to an embodiment of the present invention, a reflective near-infrared light source box includes a moving module that further comprises a first moving mechanism. The first moving mechanism includes a first guide rail and a first slider that are matched and slidably connected. The first guide rail is fixedly connected to the inside of the test box, and the first slider is connected to a second moving mechanism. The distance between the second moving mechanism and the target plate can be adjusted through the first moving mechanism, which in turn adjusts the distance between the camera under test and the target plate, facilitating the adjustment of different test distances for testing the camera under test.

[0012] According to an embodiment of the present invention, a reflective near-infrared light source box is provided with a first window on the side of the test box opposite to the target plate. A first moving mechanism is provided perpendicular to the target plate and extends from the first window to the outside of the test box. The first moving mechanism can drive the camera under test to move to the outside of the test cavity for position adjustment, extend the test distance, and expand the test range.

[0013] According to an embodiment of the present invention, a reflective near-infrared light source box includes a second moving mechanism comprising a second guide rail and a second slider that are slidably connected, with the second guide rail fixedly connected to a first slider. The distance between the camera under test and the first moving mechanism can be adjusted via the second guide rail and the second slider.

[0014] According to an embodiment of the present invention, a reflective near-infrared light source box includes a second moving mechanism further comprising multiple first bolts, a first platform, and a second platform. The first platform is connected to the second platform via the first bolts, and the second platform is fixedly connected to a second slider. By adjusting the multiple first bolts, the distance between different positions of the first platform and the second platform can be adjusted to adjust the horizontal alignment of the first platform with the camera under test.

[0015] According to an embodiment of the present invention, a reflective near-infrared light source box includes a second moving mechanism further comprising a screw, a nut, and an elastic element. One end of the screw is fixedly connected to a first platform, and the other end of the screw passes through a second platform and is threadedly connected to the nut. The elastic element is sleeved on the screw and disposed between the second platform and the nut. The combination of the screw, nut, and elastic element limits the relative position of the first and second platforms in the horizontal direction, thereby better achieving positional fixation and horizontal adjustment of the first and second platforms.

[0016] According to an embodiment of the present invention, a reflective near-infrared light source box is provided. The test box also includes a target plate fixing door and a second bolt. A second window is provided on the side of the test box near the target plate. The target plate fixing door and the second window can be detachably connected by the second bolt, which improves the convenience of target plate replacement.

[0017] According to an embodiment of the present invention, a reflective near-infrared light source box has a slot on the target plate fixing door to quickly fix the target plate and facilitate the replacement of the target plate.

[0018] According to an embodiment of the present invention, a reflective near-infrared light source box includes a light source module that further comprises visible light LEDs, with multiple light source modules arranged in an arc around a first window. Near-infrared and visible light can be used for testing respectively, and the light field uniformity within the testing cavity is strong.

[0019] According to an embodiment of the present invention, a reflective near-infrared light source box further includes an adjustment control module, which is electrically connected to the light source module to control the light output of the light source module.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a perspective view of a reflective near-infrared light source box according to an embodiment of the present utility model;

[0023] Figure 2 This is a perspective view of a reflective near-infrared light source box according to an embodiment of the present invention from another direction;

[0024] Figure 3 This is an exploded view of the test chamber structure of a reflective near-infrared light source box according to an embodiment of the present invention.

[0025] Figure 4 This is a side view of a reflective near-infrared light source box according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Sectional view of section AA;

[0027] Figure 6 for Figure 4 Sectional view of section BB;

[0028] Figure 7 This is a side view of the second moving mechanism of a reflective near-infrared light source box according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] Test box 100; Test chamber 110; First window 120; Second window 130; Target plate fixing door 140; Slot 141; Second bolt 150;

[0031] First moving mechanism 200; first guide rail 210; first slider 220;

[0032] Second moving mechanism 300; second guide rail 310; second slider 320; first bolt 330; first platform 340; second platform 350; screw 360; nut 370; elastic element 380;

[0033] Light source module 400;

[0034] Target plate 500;

[0035] Near-infrared radiometer 600; first probe 610; first telescopic rail 620;

[0036] Visible light illuminance meter 700; second probe 710; second telescopic rail 720;

[0037] Adjustment control module 800; control panel component 810; light source adjustment component 820; constant current power supply 830;

[0038] Test bench 900. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] Reference Figures 1 to 7 This utility model embodiment provides a reflective near-infrared light source box, including a test box 100, a moving module, a light source module 400, and a target plate 500. The test box 100 is internally surrounded by a test cavity 110, within which the target plate 500 and the light source module 400 are disposed. The moving module is connected to the test box 100. The moving module includes a second moving mechanism 300, which can mount a camera under test and can move the camera under test to adjust its position within the test cavity 110. The target plate 500 is disposed within the test cavity 110 and is located within the image acquisition range of the camera under test. The light source module 400 is disposed within the test cavity 110 and includes near-infrared LEDs that emit near-infrared light. The light source module 400 is used to emit light onto the target plate 500, allowing the camera under test to acquire image information of the target plate 500 under illumination by the light source module 400. Specifically, the inner surface of the test chamber 100 is coated with a barium sulfate coating to form a diffuse reflection surface inside the test chamber 100, thereby enhancing the uniformity of the light field within the test cavity 110. Specifically, the target plate 500 is a reflective target plate that can reflect the light source to the camera under test. Specifically, the second moving mechanism 300 is provided with mounting holes, and the camera under test can be fixedly mounted on the second moving mechanism 300 using screws. It should be noted that the "inner side" mentioned in this application refers to the side closest to the test cavity 110 after the component is assembled.

[0044] During testing, the camera under test (DUT) is mounted on the second moving mechanism 300. A black light-blocking cloth is then used to cover the test chamber, moving module, light source module 400, target plate 500, and the DUT mounted on the moving module, forming a sealed optical path space. The light source module 400 emits near-infrared light within the test chamber 110. This near-infrared light is reflected by a barium sulfate coating on the inner surface of the test chamber 100, creating a highly uniform light field within the test chamber 110. The near-infrared light illuminates the target plate 500 and is reflected there. A portion of the reflected near-infrared light enters the camera lens of the DUT, achieving image formation. When the position of the DUT needs to be changed, simply adjust the position of the second moving mechanism 300, moving the DUT within the test chamber 110 to adjust its position.

[0045] Near-infrared light is emitted by the near-infrared LEDs on the light source module 400, creating a near-infrared illumination environment within the test cavity 110, enabling camera testing under near-infrared illumination. The second moving mechanism 300 can move the camera under test within the test cavity 110 to adjust its position, facilitating the adjustment of the camera's position and allowing it to be placed at different locations within the test cavity for testing. This enables testing of the camera under test at different test positions and distances against the light reflected from the target plate, providing a wide range of applications and adapting to various testing environments. The inner surface of the test chamber 100 is coated with a barium sulfate coating, whose reflectivity is close to that of a standard Lambertian reflection, resulting in strong light source reflectivity and forming a diffuse reflection surface inside the test chamber 100. This enhances the uniformity of the light field in the test cavity 110 and improves the reliability of the light source box test.

[0046] As a preferred option, the near-infrared light reflectance of the target plate 500 is not less than 0.85; the test box 100 is made of aluminum alloy, the outer surface of the test box 100 is sprayed with black paint, and the inner surface is covered with light-shielding tape to cover all seams to ensure the optical path is sealed.

[0047] According to some embodiments of this application, refer to Figure 1 The moving module also includes a first moving mechanism 200, which includes a first guide rail 210 and a first slider 220 that are slidably connected. The first guide rail 210 is fixedly connected to the inside of the test chamber 100, and the first slider 220 is connected to the second moving mechanism 300. Specifically, the first guide rail 210 is fixedly connected to the inside of the bottom of the test chamber 100. The distance between the second moving mechanism 300 and the target plate 500 can be adjusted through the first moving mechanism 200, which also allows for adjustment of the distance between the camera under test and the target plate 500. This facilitates adjusting different test distances for testing the camera under test and has advantages such as long sliding stroke, high load capacity, and good rigidity.

[0048] According to some embodiments of this application, a first window 120 is provided on the side of the test chamber 100 opposite to the target plate 500, and a first moving mechanism 200 is provided perpendicular to the target plate 500. The first moving mechanism 200 extends from the first window to the outside of the test chamber 100, and can drive the camera under test to move to the outside of the test cavity 110 for position adjustment, extend the test distance, and expand the test range.

[0049] As a preferred option, the distance between the camera under test and the target plate 500 is adjustable from 0.2m to 1m.

[0050] According to some embodiments of this application, refer to Figure 1 The second moving mechanism 300 includes a second guide rail 310 and a second slider 320 that are slidably connected. The second guide rail 310 is fixedly connected to the first slider 220 to adjust the distance between the second slider 320 and the first moving mechanism 200. Specifically, the second guide rail 310 is arranged along the height direction, and the camera under test is connected to the second slider 320. By adjusting the position of the second slider 320 on the second guide rail 310, the position and height of the camera under test can be adjusted. As a preferred embodiment, the position and height of the camera under test is adjustable from 0.1m to the center height of the target plate 500.

[0051] Furthermore, referring to Figure 7 The second moving mechanism 300 also includes multiple first bolts 330, a first platform 340, and a second platform 350. The first platform 340 is connected to the second platform 350 via the first bolts 330, and the second platform 350 is fixedly connected to the second slider 320. By adjusting the multiple first bolts 330, the distance between different positions of the first platform 340 and the second platform 350 can be adjusted, thereby adjusting the level of the first platform 340. Specifically, the first platform 340 is provided with mounting holes, and the camera under test can be fixedly mounted on the first platform 340 with screws. The second slider 320 is connected through a combination of the first platform 340, the second platform 350, and the first bolts 330. By adjusting the level of the first platform 340, the level of the camera under test can be adjusted.

[0052] As a preferred embodiment, four first bolts 330 are provided, positioned near the four corners of the first platform 340 to better adjust its level. Furthermore, the first bolts 330 are threadedly connected to the first platform 340, and their bottom ends contact the second platform 350. The level of the first platform 340 is adjusted by regulating the height of each first bolt 330 extending from the first platform 340. Additionally, rubber washers are provided at the bottom ends of the first bolts 330 to improve the vibration isolation and stability of the first platform 340.

[0053] Furthermore, referring to Figure 7The second moving mechanism 300 also includes a screw 360, a nut 370, and an elastic element 380. One end of the screw 360 is fixedly connected to the first platform 340, and the other end of the screw 360 passes through the second platform 350 and is threadedly connected to the nut 370. The elastic element 380 is sleeved on the screw 360 and positioned between the second platform 350 and the nut 370. Specifically, the elastic element 380 is a spring. Through the combination of the screw 360, the nut 370, and the spring, the relative position of the first platform 340 and the second platform 350 in the horizontal direction can be limited, and the second platform 350 can be pushed towards the first platform 340. In conjunction with the first bolt 330, the position fixation and horizontal adjustment of the first platform 340 and the second platform 350 can be better achieved.

[0054] As a preferred embodiment, four screws 360, four nuts 370, and four elastic elements 380 are provided, each corresponding to one of the four first bolts 330 located next to the first bolt 330.

[0055] According to some embodiments of this application, refer to Figure 3 The test chamber 100 also includes a target plate fixing door 140 and second bolts 150. A second window 130 is provided on the side of the test chamber 100 away from the first window 120. The target plate fixing door 140 is detachably connected to the second window 130 via the second bolts 150. The target plate 500 is installed on the target plate fixing door 140. When the target plate 500 needs to be replaced, simply unscrew the two second bolts 150 and remove the target plate fixing door 140 from the second window 130 for easy replacement, which is highly convenient. The target plate fixing door 140 matches the second window 130. When the target plate fixing door 140 is connected to the second window 130, it can prevent light leakage in the test chamber 110 and ensure reliable test results.

[0056] Furthermore, referring to Figure 6 The target plate fixing door 140 is provided with slots 141 for quick fixing of the target plate 500. Specifically, multiple slots 141 are respectively located on the left and right edges and the bottom edge of the inner side of the target plate fixing door 140. The target plate 500 can be locked into the multiple slots 141, and the left and right sides and bottom of the target plate 500 are limited and fixed. When it is necessary to replace the target plate 500, simply lift the target plate 500 upwards to disengage it from all the slots 141, making it convenient to replace the target plate 500.

[0057] According to some embodiments of this application, refer to Figure 5The light source module 400 also includes visible light LEDs, and multiple light source modules 400 are arranged in an arc around the first window 120. The light source module 400 can emit near-infrared light and visible light, and can be used for testing using near-infrared light and visible light respectively; the multiple light source modules 400 arranged in an arc can emit test light more uniformly within the test cavity 110, further enhancing the uniformity of the near-infrared light field or visible light field within the test cavity 110.

[0058] As a preferred option, the light source module 400 includes 3200k visible light LEDs, 6500k visible light LEDs, 850nm near-infrared LEDs, and 920nm near-infrared LEDs. The four types of LEDs are evenly distributed on the light source module 400 to improve the uniformity of the light source.

[0059] As a preferred solution, in order to achieve a light source uniformity of over 85%, three light source modules 400 are provided. Each light source module 400 is equipped with a diffuse reflection lens. Combined with a test chamber 100 with a black paint coating on the outer surface and a barium sulfate coating on the inner surface, and with all seams on the inner surface of the test chamber 100 covered with light-shielding tape, the required light uniformity can be measured.

[0060] As a preferred embodiment, the light source module 400 also includes an angle adjustment module (not shown in the attached figure) which can adjust the light emission angle of the light source.

[0061] It should be noted that, referring to Figure 2 and Figure 6 In other embodiments, a near-infrared radiometer 600 and a visible light illuminance meter 700 are provided on the test chamber 100 to monitor the near-infrared irradiance and visible light illuminance values ​​within the test cavity 110 in real time. Specifically, a first telescopic rail 620 is provided inside the test chamber 100, and the first probe 610 of the near-infrared radiometer 600 is mounted on the first telescopic rail 620 to receive near-infrared light within the test cavity 110. The position of the first probe 610 can be adjusted via the first telescopic rail 620. The first display module of the near-infrared radiometer 600 is installed outside the test chamber 100 for easy viewing of the monitored near-infrared irradiance values. Specifically, a second telescopic rail 720 is provided inside the test chamber 100. The second probe 710 of the visible light illuminance meter 700 is installed on the second telescopic rail 720 to receive visible light from the test chamber 110. The position of the second probe 710 can be adjusted via the second telescopic rail 720. The second display module of the visible light illuminance meter 700 is installed outside the test chamber 100 for easy viewing of the monitored visible light illuminance values.

[0062] According to some embodiments of this application, refer to Figure 6The system also includes an adjustment and control module 800, which is electrically connected to the light source module 400 to control the light output of the light source module 400. By controlling the light output of the light source module 400, the lighting environment inside the test cavity 110 can be changed according to requirements, simulating different lighting environments for testing the camera under test. Specifically, the adjustment and control module 800 includes a control panel assembly 810, a light source adjustment assembly 820, and a constant current power supply 830. The constant current power supply 830 supplies power to the light source adjustment assembly 820. The control panel assembly 810 can control the power output of the light source adjustment assembly 820. The light source adjustment assembly 820 is electrically connected to the light source module 400. By changing the power output of the light source adjustment assembly 820, the light output of the light source module 400 can be controlled.

[0063] As a preferred embodiment, the light source adjustment assembly 820 includes a light source driver, a light source switch, and a light intensity adjustment component, which are electrically connected sequentially. Further, the control panel assembly 810 includes a mains power supply interface, a light source selection switch, and a brightness adjustment switch. The mains power supply interface is electrically connected to a constant current power supply 830, which converts the mains power into DC constant current. The light source selection switch is connected to the light source switch and is used to switch between 3200k visible light, 6500k visible light, 850nm near-infrared light, or 920nm near-infrared light as the test light source. The brightness adjustment switch is connected to the light intensity adjustment component and is used to adjust the current of the light source module 400, thereby adjusting the light intensity, achieving target surface illuminance adjustment from 0Lx to 3000Lx. The light source driver is electrically connected to the light source module 400 and provides power to drive the light source module 400.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A reflective near-infrared light source box, characterized in that, include: The test chamber (100) is provided with a test cavity (110); The mobile module includes a second mobile mechanism (300), which is capable of mounting a camera under test and can move the camera under test to adjust its position within the test cavity (110). A target plate (500) is disposed inside the test cavity (110), and the target plate (500) is located within the image acquisition range of the camera under test; A light source module (400) is disposed in the test cavity (110). The light source module (400) includes near-infrared lamp beads. The light source module (400) is used to emit light onto the target plate (500). The camera under test can acquire image information of the target plate (500) under the illumination of the light source module (400).

2. The reflective near-infrared light source box according to claim 1, characterized in that, The mobile module further includes a first mobile mechanism (200), which includes a first guide rail (210) and a first slider (220) that are matched and slidably connected. The first guide rail (210) is fixedly connected to the inside of the test box (100), and the first slider (220) is connected to the second mobile mechanism (300).

3. A reflective near-infrared light source box according to claim 2, characterized in that, The test chamber (100) has a first window (120) on the side opposite to the target plate (500), and the first moving mechanism (200) is arranged perpendicular to the target plate (500). The first moving mechanism (200) extends from the first window (120) to the outside of the test chamber (100).

4. A reflective near-infrared light source box according to claim 2, characterized in that, The second moving mechanism (300) includes a second guide rail (310) and a second slider (320) that are matched and slidably connected, and the second guide rail (310) is fixedly connected to the first slider (220).

5. A reflective near-infrared light source box according to claim 4, characterized in that, The second moving mechanism (300) also includes a plurality of first bolts (330), a first platform (340) and a second platform (350), the first platform (340) being connected to the second platform (350) via the first bolts (330), and the second platform (350) being fixedly connected to the second slider (320).

6. A reflective near-infrared light source box according to claim 5, characterized in that, The second moving mechanism (300) further includes a screw (360), a nut (370) and an elastic element (380). One end of the screw (360) is fixedly connected to the first platform (340), and the other end of the screw (360) passes through the second platform (350) and is threadedly connected to the nut (370). The elastic element (380) is sleeved on the screw (360) and disposed between the second platform (350) and the nut (370).

7. A reflective near-infrared light source box according to claim 1, characterized in that, The test box (100) also includes a target plate fixing door (140) and a second bolt (150). A second window (130) is provided on the side of the test box (100) near the target plate (500). The target plate fixing door (140) and the second window (130) can be detachably connected by the second bolt (150).

8. A reflective near-infrared light source box according to claim 7, characterized in that, The target plate fixing door (140) is provided with a slot (141) to quickly fix the target plate (500).

9. A reflective near-infrared light source box according to claim 3, characterized in that, The light source module (400) also includes visible light lamp beads, and multiple light source modules (400) are arranged in an arc around the first window (120).

10. A reflective near-infrared light source box according to claim 1, characterized in that, It also includes an adjustment control module (800), which is electrically connected to the light source module (400) to control the light output of the light source module (400).

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