Detection device for low-light image intensifier

Abstract

This utility model discloses a detection device for a low-light image intensifier, comprising a light source, an integrating sphere assembly, a dark box, and a detection component arranged sequentially. The dark box contains a clamp for mounting the low-light image intensifier, and an optical channel is provided between the light source, the integrating sphere assembly, and the dark box. The dark box includes a top plate with a mounting through-hole corresponding to the fluorescent screen of the low-light image intensifier. The detection component includes an eyepiece and a detection camera. The eyepiece is detachably connected to the mounting through-hole via a first adapter. The detection camera is located above the top plate, and a light-shielding tube is connected to its lower part. The lower end of the light-shielding tube is detachably connected to the mounting through-hole via a second adapter. This utility model integrates camera detection and visual detection into a single setup by connecting the eyepiece and the light-shielding tube of the detection camera to the same mounting through-hole via the first and second adapters, respectively, effectively improving the detection efficiency of the imaging uniformity of the low-light image intensifier.

Description

Technical Field

[0001] This utility model relates to the field of low-light image intensifier technology, and in particular to a detection device for low-light image intensifier. Background Technology

[0002] A low-light image intensifier is an electro-optical device that amplifies weak ambient light, such as moonlight, starlight, and atmospheric glow, to generate a bright and clear image. It is a core component of modern night vision technology and plays a crucial role in the field. The basic working principle of a low-light image intensifier can be summarized as: photoelectric conversion → electron multiplication → electro-optic conversion. The entire process is completed within a high-vacuum tube to achieve efficient electron movement, taking only nanoseconds, thus enabling real-time observation.

[0003] Image quality is a crucial indicator of clear imaging in low-light environments. High-performance image intensifiers should exhibit high brightness, high definition, high signal-to-noise ratio, low noise, uniform brightness, and freedom from distortion and defects. Evaluating these performance parameters allows for a quick and accurate assessment of the true quality of the output image. Measuring the deviation of brightness or grayscale values ​​at different locations on the image intensifier's output screen relative to the central area assesses the uniformity of its light intensity distribution. Non-uniform images may exhibit defects such as a bright center, dark edges (vignetting), or black spots and bright patches, severely impacting observation and target identification. The imaging uniformity test for low-light image intensifiers is an important photoelectric measurement process. Uniform light source excitation, CMOS camera acquisition, and computer software analysis quantitatively provide the uniformity value and distribution map of the image intensifier's output brightness, evaluating the uniformity of the brightness response throughout the entire effective imaging area. Imaging uniformity is a key indicator of image intensifier performance, directly affecting the detail resolution of the observed image and the user experience.

[0004] Current image intensifier uniformity testing separates CMOS camera testing and visual testing onto different testing equipment, making the process cumbersome. The illuminance at the integrating sphere's exit aperture is adjusted manually via an aperture, resulting in significant adjustment errors. Furthermore, the aperture and illuminance meter do not form a closed-loop control system; as measurement time increases, the actual illuminance deviates further from the calibrated illuminance, necessitating recalibration and reducing testing efficiency. The darkroom used in the test is exposed to the atmosphere, making it prone to arcing when the image tube is energized with high voltage. Summary of the Invention

[0005] The purpose of this invention is to provide a detection device for low-light image intensifiers, so as to solve the problem that the image intensifier uniformity test in the prior art is complicated by separating CMOS camera testing and visual testing on different testing devices.

[0006] To achieve the above objectives, this utility model provides a detection device for a low-light image intensifier, comprising a light source, an integrating sphere assembly, a dark box, and a detection assembly arranged sequentially from bottom to top. The dark box is equipped with a clamp for mounting the low-light image intensifier. An optical channel is provided between the light source, the integrating sphere assembly, and the dark box to allow light emitted by the light source to illuminate the low-light image intensifier within the dark box. The dark box includes a top plate with a mounting through-hole corresponding to the fluorescent screen of the low-light image intensifier. The detection assembly includes an eyepiece and a detection camera. The eyepiece is detachably connected to the mounting through-hole via a first adapter. The detection camera is located above the top plate, and a light-shielding tube is connected to the lower part of the detection camera. The lower end of the light-shielding tube is detachably connected to the mounting through-hole via a second adapter.

[0007] Preferably, the mounting through hole has an annular mounting platform, the first adapter includes a first main body with openings at both ends, the upper part of the first main body is provided with an outwardly extending snap-fit ​​part, the lower part of the first main body is provided with an inwardly extending support platform, the first main body extends into the mounting platform and the snap-fit ​​part snaps into the mounting platform, the eyepiece is embedded in the first main body and the bottom of the eyepiece is located on the support platform.

[0008] Preferably, the second adapter includes an annular second main body, the inner side of which is provided with an upwardly extending annular protrusion, the second main body is embedded in the mounting through hole and the bottom of the second main body is located on the mounting platform, and the lower part of the light-shielding tube is sleeved on the annular protrusion and connected to the annular protrusion by a clamp.

[0009] Preferably, the detection device further includes a working platform, the light source and the integrating sphere assembly are located below the working platform, the dark box is installed on the working platform, and the working platform is also provided with a moving module. The moving module includes a rotating component, the rotating component includes a vertically arranged rotating shaft and a rotating arm rotatably connected to the rotating shaft, one end of the rotating arm is sleeved on the rotating shaft and the other end of the rotating arm is connected to the detection camera.

[0010] Preferably, the moving module further includes a horizontal moving component, and the rotating component is mounted on the horizontal moving component.

[0011] Preferably, the working platform is provided with a light-emitting hole, and the dark box further includes a base plate. The base plate is provided with a light-inlet hole corresponding to the light-emitting hole. A first light-transmitting glass is provided in the light-inlet hole, and the first light-transmitting glass is sealed to the light-inlet hole. A second light-transmitting glass is also installed inside the mounting through hole, and the second light-transmitting glass is sealed to the mounting through hole. The dark box is also provided with an air inlet hole and an air outlet hole to introduce inert gas into the dark box.

[0012] Preferably, the base plate is provided with a recessed groove, the light inlet hole penetrates the middle of the bottom of the recessed groove, the bottom of the recessed groove is also provided with a first annular groove around the light inlet hole, the first light-transmitting glass is embedded in the recessed groove and a first sealing ring is provided in the first annular groove, and a first limiting member is also provided on the side of the first light-transmitting glass away from the first sealing ring, the first limiting member is connected to the base plate to fix the first light-transmitting glass to the base plate.

[0013] Preferably, the inner side of the top plate is connected to the mounting through hole with an annular connector. The inner wall of the annular connector is provided with an annular connecting part extending toward its center. The lower surface of the annular connecting part is also provided with an inwardly recessed second annular groove. A second sealing ring is embedded in the second annular groove. The bottom of the annular connecting part is provided with a second limiting member so that the second light-transmitting glass is sandwiched between the annular connecting part and the second limiting member.

[0014] Preferably, the dark box further includes a peripheral side plate connecting the top plate and the bottom plate, the air inlet and the air outlet are both provided on the peripheral side plate, and the peripheral side plate is also provided with a pressure relief valve.

[0015] Preferably, the integrating sphere assembly includes a sub-integrating sphere and a main integrating sphere, the sub-integrating sphere being located below the main integrating sphere, and a manual aperture and an electric aperture being provided between the sub-integrating sphere and the main integrating sphere.

[0016] Compared with the prior art, this utility model integrates camera detection and visual detection into the same setup by connecting the eyepiece and the light shield of the detection camera to the same mounting through hole through the first adapter and the second adapter, respectively. The device has a high degree of integration, occupies little space, and can effectively improve the detection efficiency of the imaging uniformity of the low-light image intensifier. The design is ingenious. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the detection device of the low-light image intensifier according to an embodiment of the present invention, taken from one angle.

[0018] Figure 2 This is a structural diagram of the detection device of the low-light image intensifier according to an embodiment of the present invention from another angle.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 This is a structural diagram of the top cover plate.

[0021] Figure 5 This is a cross-sectional view of the darkroom with an eyepiece installed in an embodiment of this utility model.

[0022] Figure 6 This is a structural diagram of the detection camera and the dark box after they are connected in an embodiment of this utility model.

[0023] Figure 7 This is a cross-sectional view of the detection camera and the dark box in an embodiment of this utility model.

[0024] Figure 8 This is a structural diagram of the light source, negative integrating sphere, manual aperture, electric aperture, and main integrating sphere connected in sequence in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Detection device; 101. Working platform; 1. Light source; 2. Integrating sphere assembly; 21. Sub-integrating sphere; 22. Main integrating sphere; 221. Low-light illuminance meter; 222. Micro-illuminance meter; 223. Connecting flange; 31. Manual diaphragm; 32. Electric diaphragm; 4. Dark box; 40. Fixture; 401. Mounting base; 41. Top plate; 411. Mounting through hole; 4111. Mounting platform; 42. Base plate; 420. Light inlet; 421, recessed groove; 4211, first annular groove; 43, left side plate; 431, air inlet; 44, right side plate; 441, exhaust port; 45, front side plate; 461, first light-transmitting glass; 462, second light-transmitting glass; 47, first limiting member; 48, annular connector; 481, annular connecting part; 49, second limiting member; 5, eyepiece; 51, first adapter; 511, first main body part; 512 513. Connecting part; 6. Bearing platform; 7. Detection camera; 8. Light shield; 91. Second adapter; 10. Second main body; 11. Annular protrusion; 12. Moving module; 13. Rotating assembly; 14. Rotating shaft; 15. Rotating arm; 16. Collar; 17. Locking part; 18. Horizontal moving assembly; 19. X-axis linear moving assembly; 10. First lower panel; 11. First mounting block; 12. First lead screw; 13. First guide rod; 14. First adjustment knob; 15. Y-axis linear moving assembly; 16. Second lower panel; 17. Second mounting block; 18. Second lead screw; 19. Second guide rod; 10. Second adjustment knob; 11. Second slide; 12. Display; 13. Controller; 14. Low-light image intensifier; 15. Mounting plate. Detailed Implementation

[0027] To explain in detail the technical content, structural features, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] like Figures 1 to 8As shown, this utility model embodiment provides a detection device for a low-light image intensifier, including a light source 1, an integrating sphere assembly 2, a dark box 4, and a detection component arranged sequentially from bottom to top. The dark box 4 is provided with a clamp 40 for mounting the low-light image intensifier 20. An optical channel is provided between the light source 1, the integrating sphere assembly 2, and the dark box 4 so that the light emitted by the light source 1 can irradiate the low-light image intensifier 20 in the dark box 4. The dark box 4 includes a top plate 41, and a mounting through hole 411 is opened on the top plate 41 corresponding to the fluorescent screen of the low-light image intensifier 20. The detection component includes an eyepiece 5 and a detection camera 6. The eyepiece 5 and the mounting through hole 411 are detachably connected by a first adapter 51. The detection camera 6 is located above the top plate 41, and a light shield 7 is also connected to the lower part of the detection camera 6. The lower end of the light shield 7 is detachably connected to the mounting through hole 411 by a second adapter 71. Specifically, the light source 1, integrating sphere assembly 2, dark box 4, and detection assembly are arranged sequentially from bottom to top, effectively saving space and facilitating operation. The light source 1 can be a halogen lamp. A light channel is provided between the light source 1, integrating sphere assembly 2, and dark box 4 to guide the light emitted by the light source 1 into the low-light image intensifier 20. The light channel is a straight channel from bottom to top. The fixture 40 includes a mounting base 401. A mounting plate 201 is connected to the low-light image intensifier 20. The mounting plate 201 is fixedly mounted on the mounting base 401 to mount the low-light image intensifier 20 onto the fixture 40. Light-transmitting holes are opened in the mounting base 401 and the mounting plate 201 to allow the light emitted by the light source 1 to pass through the mounting base 401 and the mounting plate 201 and enter the low-light image intensifier 20. In addition, the detection camera 6 can be a combination of a CMOS camera and an FA industrial lens, and the light-shielding tube 7 can be a corrugated tube. In this embodiment of the invention, the detection device 10 for the low-light image intensifier 20 is used by first installing the low-light image intensifier 20 onto the clamp 40 in the dark box 4, then applying a specified voltage to each port of the low-light image intensifier 20. Light emitted from the integrating sphere assembly 2 then strikes the photocathode of the low-light image intensifier 20, displaying a pattern of a certain brightness on the fluorescent screen of the low-light image intensifier 20. When it is necessary to observe the fluorescent screen image using the eyepiece 5, the eyepiece 5 can be installed on the mounting through hole 411 via the first adapter 51 to face the low-light image intensifier. When it is necessary to observe the image on the fluorescent screen of the image intensifier 20 using the inspection camera 6, the eyepiece 5 can be removed from the mounting through hole 411, and the inspection camera 6 can be aligned with the fluorescent screen. The lower end of the light shield 7 is connected to the mounting through hole 411 through the second adapter 71 to prevent ambient light from affecting the image. The inspection device 10 of the low-light image intensifier 20 also includes a display 91 and a controller 92. The image on the fluorescent screen is displayed on the display 91 through the inspection camera 6. The uniformity of the image and black spots and bright spots can be observed on the display 91.

[0029] This utility model embodiment connects the eyepiece 5 and the light-shielding tube 7 of the detection camera 6 to the same mounting through hole 411 via the first adapter 51 and the second adapter 71, respectively, thereby integrating camera detection and visual detection into the same setup. The device has a high degree of integration, occupies a small space, and can effectively improve the detection efficiency of the imaging uniformity of the low-light image intensifier 20. The design is ingenious.

[0030] In this embodiment of the utility model, such as Figures 4 to 7 As shown, the mounting through hole 411 has an annular mounting platform 4111. The first adapter 51 includes a first main body 511 with openings at both ends. The upper part of the first main body 511 is provided with an outwardly extending snap-fit ​​part 512, and the lower part of the first main body 511 is provided with an inwardly extending support platform 513. The first main body 511 extends into the mounting platform 4111 and the snap-fit ​​part 512 snaps into the mounting platform 4111. The eyepiece 5 is embedded in the first main body 511 and the bottom of the eyepiece 5 is located on the support platform 513. Specifically, the mounting through hole 411 is a circular hole structure and includes a first hole at the bottom and a second hole at the top. The diameter of the first hole is smaller than that of the second hole to form a mounting platform 4111 between the first hole and the second hole. The first main body 511 is hollow columnar and passes through the first hole. The snap-fit ​​part 512 snaps into the mounting platform 4111 and is connected by screws. The eyepiece 5 can be embedded in the first main body 511 and limited by the bearing platform 513. The design is ingenious. The structure of the first adapter 51 and the mounting through hole 411 can be designed according to actual needs, as long as it is possible to install the eyepiece 5 and use the eyepiece 5 for observation.

[0031] In this embodiment of the utility model, such as Figures 4 to 7 As shown, the second adapter 71 includes an annular second main body 711, with an upwardly extending annular protrusion 712 on the inner side of the second main body 711. The second main body 711 is embedded in the mounting through hole 411, and the bottom of the second main body 711 is located on the mounting platform 4111. The lower part of the light-shielding tube 7 is sleeved on the annular protrusion 712 and connected to the annular protrusion 712 by a clamp. Specifically, both the second main body 711 and the annular protrusion 712 are hollow columns. The second main body 711 is screwed to the mounting platform 4111. The inner diameter of the annular protrusion 712 needs to be larger than the size of the fluorescent screen to facilitate observation of the fluorescent screen. By setting the mounting platform 4111 in the mounting through hole 411 and adapting it to the mounting platform 4111 through the first adapter 51 and the second adapter 71, a simultaneous adaptation and connection between the mounting through hole 411 and the eyepiece 5 and the detection camera 6 is achieved, which is an ingenious design.

[0032] In this embodiment of the utility model, such as Figures 1 to 3 as well as Figure 8As shown, the detection device 10 also includes a working platform 101, a light source 1 and an integrating sphere assembly 2 located below the working platform 101, a dark box 4 installed on the working platform 101, and a moving module 8 on the working platform 101. The moving module 8 includes a rotating assembly 81, which includes a vertically arranged rotating shaft 811 and a rotating arm 812 rotatably connected to the rotating shaft 811. One end of the rotating arm 812 is sleeved on the rotating shaft 811 and the other end of the rotating arm 812 is connected to a detection camera 6. Specifically, the work platform 101 is rectangular, and its height is set according to a suitable operating height to facilitate operation. A rotating arm 812 is located at the rear of the darkroom 4. One end of the rotating arm 812 has a collar 8121, which is fitted onto the rotating shaft 811 for rotatable connection. The other end of the rotating arm 812 is fixedly connected to a detection camera 6. The detection device 10 also includes a locking element 813, with a locking hole on the collar 8121. The locking element 813 is threadedly connected to the locking hole. The rotating arm 812 is fixed by pressing against the rotating shaft 811. In actual use, the rotating assembly 81 can predetermine the Z-axis focal length of the inspection camera 6 and limit the vertical position, making it more convenient to use. When using the eyepiece 5 for inspection, the rotating arm 812 is used to rotate the inspection camera 6 from directly above the fluorescent screen to one side to facilitate the installation of the eyepiece 5 for visual inspection. When the inspection camera 6 needs to be used for inspection, simply rotate the rotating arm 812 and move the inspection camera 6 directly above the fluorescent screen.

[0033] In this embodiment of the utility model, such as Figures 1 to 3As shown, the moving module 8 also includes a horizontal moving component 82, and a rotating component 81 is mounted on the horizontal moving component 82. Specifically, the horizontal moving component 82 is located at the rear of the dark box 4. The horizontal moving component 82 includes an X-axis linear moving component 821 and a Y-axis linear moving component 822. The Y-axis linear moving component 822 is mounted on the X-axis linear moving component 821 so that the horizontal moving component 82 forms a cross slide. Further, the X-axis linear moving component 821 includes a first slide, a first lower panel 8211, and two first mounting blocks 8212 located at both ends of the first lower panel 8211. Two first guide rods 8214 and a first lead screw 8213 are provided between the two first mounting blocks 8212. One end of the first lead screw 8213 is also connected to a first adjusting knob 8215. The first lead screw 8213 drives the first slide to move. The first guide rods 8214 pass through the first slide and are slidably connected to the first slide. The moving assembly 822 includes a second slide 8226, a second lower panel 8221, and two second mounting blocks 8222 located at both ends of the second lower panel 8221. Two second guide rods 8224 and a second lead screw 8223 are provided between the two second mounting blocks 8222. One end of the second lead screw 8223 is also connected to a second adjustment knob 8225. The second lead screw 8223 drives the second slide 8226 to move. The second guide rods 8224 pass through the second slide 8226 and are slidably connected to the second slide 8226. The rotating shaft 811 is mounted on the second slide 8226 of the Y-axis linear moving assembly 822. In use, the position of the first slide and the second slide 8226 can be adjusted by rotating the first adjustment knob 8215 and the second adjustment knob 8225 to adjust the position of the detection camera 6 in the horizontal direction.

[0034] In this embodiment of the utility model, such as Figures 1 to 8As shown, the working platform 101 is provided with a light outlet hole, and the dark box 4 also includes a base plate 42. The base plate 42 is provided with a light inlet hole 420 corresponding to the light outlet hole. A first light-transmitting glass 461 is provided in the light inlet hole 420. The first light-transmitting glass 461 is sealed to the light inlet hole 420. A second light-transmitting glass 462 is also installed on the inner side of the mounting through hole 411. The second light-transmitting glass 462 is sealed to the mounting through hole 411. The dark box 4 is also provided with an air inlet hole 431 and an exhaust hole 441 to introduce inert gas into the dark box 4. Specifically, the inert gas can be nitrogen, and the first and second transparent glass 461 and 462 can be quartz glass. In order for the light emitted by the light source 1 to be transmitted to the dark box 4 through the working platform 101, a light-emitting hole needs to be opened on the working platform 101. The light-emitting hole is connected to the integrating sphere assembly 2 through the connecting flange 223 to ensure the sealing of the connection. The bottom plate 42 of the dark box 4 is connected to the working platform 101 and the bottom plate 42 is provided with a light-entry hole 420. By setting the first transparent glass 461 in the light-entry hole 420 and sealing the first transparent glass 461 with the light-entry hole 420, and by setting the second transparent glass 462 inside the mounting through hole 411 and sealing the second transparent glass 462 with the mounting through hole 411, it is ensured that the dark box 4 can both allow light to pass through and remain in a sealed state. In addition, by introducing nitrogen into the dark box 4, it is possible to effectively prevent arcing when the low-light image intensifier 20 is supplied with high voltage.

[0035] Furthermore, such as Figures 5 to 7 As shown, a recessed groove 421 is provided on the base plate 42, and a light inlet hole 420 penetrates the middle of the bottom of the recessed groove 421. A first annular groove 4211 is also provided around the light inlet hole 420 at the bottom of the recessed groove 421. A first translucent glass 461 is embedded in the recessed groove 421, and a first sealing ring is provided in the first annular groove 4211. A first limiting member 47 is also provided on the side of the first translucent glass 461 away from the first sealing ring. The first limiting member 47 is connected to the base plate 42 to fix the first translucent glass 461 to the base plate 42. Specifically, by providing a first sealing ring at the bottom of the recessed groove 421, the sealing between the first translucent glass 461 and the light inlet hole 420 can be effectively guaranteed. Of course, multiple sealing rings can also be provided between the first translucent glass 461 and the light inlet hole 420 to further guarantee the sealing between the first translucent glass 461 and the light inlet hole 420.

[0036] In this embodiment of the utility model, such as Figure 5As shown, an annular connector 48 is connected to the inner side of the top plate 41 corresponding to the mounting through hole 411. The inner wall of the annular connector 48 has an annular connecting portion 481 extending towards its center. The lower surface of the annular connecting portion 481 also has an inwardly recessed second annular groove. A second sealing ring is embedded in the second annular groove. A second limiting member 49 is provided at the bottom of the annular connecting portion 481 so that the second light-transmitting glass 462 is sandwiched between the annular connecting portion 481 and the second limiting member 49. Specifically, by providing a second sealing ring on the annular connecting portion 481, the sealing performance between the second light-transmitting glass 462 and the mounting through hole 411 can be effectively guaranteed. Of course, multiple sealing rings can also be provided between the second light-transmitting glass 462 and the mounting through hole 411 to further guarantee the sealing performance between the second light-transmitting glass 462 and the mounting through hole 411.

[0037] In this embodiment of the utility model, such as Figures 4 to 6 As shown, the dark box 4 also includes a peripheral side plate connecting the top plate 41 and the bottom plate 42. An air inlet 431 and an exhaust 441 are both located on the peripheral side plate, which also has a pressure relief valve. Specifically, the dark box 4 has a rectangular structure. The peripheral side plate includes a front side plate 45, a rear side plate, a left side plate 43, and a right side plate 44. The air inlet 431 is located on the left side plate 43, and the exhaust 441 is located on the right side plate 44. The right side plate 44 also has a pressure relief valve to maintain the pressure in the dark box 4 within a preset range. The front side plate 45 and the right side plate 44 are hinged together to open and close the dark box 4.

[0038] In this embodiment of the utility model, such as Figure 1 as well as Figure 8 As shown, the integrating sphere assembly 2 includes a sub-integrating sphere 21 and a main integrating sphere 22. The sub-integrating sphere 21 is located below the main integrating sphere 22. A manual aperture 31 and an electric aperture 32 are also provided between the sub-integrating sphere 21 and the main integrating sphere 22. Specifically, both the sub-integrating sphere 21 and the main integrating sphere 22 are hollow spheres with their inner walls coated with a high diffuse reflectance material, typically barium sulfate or polytetrafluoroethylene. Their core working principle utilizes their perfect geometry and high diffuse reflectance inner walls to allow light entering the sphere to undergo multiple reflections, forming a uniform and stable diffuse light source 1 at the light exit aperture. A low-light illuminance meter 222 and a low-light illuminance meter 211 are installed on the main integrating sphere 22, located on opposite sides of the main integrating sphere 22. In use, the light source 1 is first powered on, the DC power supply voltage is adjusted, and the color temperature is controlled at 2856K using a color temperature illuminance meter. The low-light illuminance meter 211 has a measurement range of 1x10⁻¹⁰. -4 ~2x10 3 The lx, low-light illuminance meter 222 has a testing range of 1x10. -6~2lx. The electric diaphragm 32 has an operating range of 0~40mm. The electric diaphragm 32, the low-light illuminance meter 222, and the weak-light illuminance meter 211 are set into closed-loop control via software. When a specific illuminance value is set, the electric diaphragm 32 opens a small hole with a diameter corresponding to the illuminance value via a stepper motor. This allows for real-time adjustment based on the feedback illuminance value, enabling long-term use without frequent disassembly and making adjustment more convenient. Of course, this utility model also includes a manual diaphragm 31 to meet the needs of various application scenarios.

[0039] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A detecting device for a micro- image intensifier, characterized in that: The device includes a light source, an integrating sphere assembly, a dark box, and a detection assembly arranged sequentially from bottom to top. The dark box is equipped with a fixture for installing a low-light image intensifier. An optical channel is provided between the light source, the integrating sphere assembly, and the dark box so that the light emitted by the light source can illuminate the low-light image intensifier in the dark box. The darkroom includes a top plate, on which a mounting through hole is provided corresponding to the fluorescent screen of the low-light image intensifier. The detection assembly includes an eyepiece and a detection camera. The eyepiece is detachably connected to the mounting through hole via a first adapter. The detection camera is located above the top plate, and a light-shielding tube is connected to the lower part of the detection camera. The lower end of the light-shielding tube is detachably connected to the mounting through hole via a second adapter.

2. The micro-λngled image intensifier detecting device according to claim 1, wherein: The mounting through hole has an annular mounting platform. The first adapter includes a first main body with openings at both ends. The upper part of the first main body is provided with an outwardly extending snap-fit ​​part, and the lower part of the first main body is provided with an inwardly extending support platform. The first main body extends into the mounting platform and the snap-fit ​​part snaps into the mounting platform. The eyepiece is embedded in the first main body and the bottom of the eyepiece is located on the support platform.

3. The micro-λngled image intensifier detecting device according to claim 2, wherein: the first and second electrodes are formed of a material having a work function of 2.0 eV or more and 3.0 eV or less. The second adapter includes an annular second main body, with an upwardly extending annular protrusion on the inner side of the second main body. The second main body is embedded in the mounting through hole and the bottom of the second main body is located on the mounting platform. The lower part of the light-shielding tube is sleeved on the annular protrusion and connected to the annular protrusion by a clamp.

4. The detection device for a low-light image intensifier as described in claim 1, characterized in that: The detection device further includes a working platform, the light source and the integrating sphere assembly are located below the working platform, the dark box is installed on the working platform, and the working platform is also provided with a moving module. The moving module includes a rotating component, the rotating component includes a vertically arranged rotating shaft and a rotating arm rotatably connected to the rotating shaft, one end of the rotating arm is sleeved on the rotating shaft and the other end of the rotating arm is connected to the detection camera.

5. The micro-λngled image intensifier detecting device according to claim 4, wherein: the first and second electrodes are formed of a material having a work function of 2.5 eV or more. The mobile module also includes a horizontal moving component, and the rotating component is mounted on the horizontal moving component. ​ 6. The detection device for a low-light image intensifier as described in claim 4, characterized in that: The working platform is provided with a light-emitting hole, and the dark box also includes a base plate. The base plate is provided with a light-inlet hole corresponding to the light-emitting hole. A first light-transmitting glass is provided in the light-inlet hole, and the first light-transmitting glass is sealed to the light-inlet hole. A second light-transmitting glass is also installed inside the mounting through hole, and the second light-transmitting glass is sealed to the mounting through hole. The dark box is also provided with an air inlet hole and an exhaust hole to introduce inert gas into the dark box.

7. The micro-λngled image intensifier detecting device according to claim 6, wherein: the first and second electrodes are formed of a material having a work function of 2.5 eV or more. The base plate is provided with a recessed groove, and the light inlet hole penetrates the middle of the bottom of the recessed groove. The bottom of the recessed groove is also provided with a first annular groove around the light inlet hole. The first light-transmitting glass is embedded in the recessed groove, and a first sealing ring is provided in the first annular groove. A first limiting member is also provided on the side of the first light-transmitting glass away from the first sealing ring. The first limiting member is connected to the base plate to fix the first light-transmitting glass to the base plate. ​ 8. The micro-λngled image intensifier detecting device according to claim 6, wherein: the first and second electrodes are formed of a material having a work function of 2.5 eV or more and 3.5 eV or less. The inner side of the top plate is connected to the mounting through hole with an annular connector. The inner wall of the annular connector is provided with an annular connecting part extending towards its center. The lower surface of the annular connecting part is also provided with an inwardly recessed second annular groove. A second sealing ring is embedded in the second annular groove. The bottom of the annular connecting part is provided with a second limiting member so that the second light-transmitting glass is sandwiched between the annular connecting part and the second limiting member.

9. The detection device for a low-light image intensifier as described in claim 6, characterized in that: The dark box also includes a peripheral side plate connecting the top plate and the bottom plate. The air inlet and the air outlet are both located on the peripheral side plate, and a pressure relief valve is also provided on the peripheral side plate.

10. The micro-λngled image intensifier detecting device as claimed in claim 1, wherein: The integrating sphere assembly includes a sub-integrating sphere and a main integrating sphere. The sub-integrating sphere is located below the main integrating sphere. A manual aperture and an electric aperture are also provided between the sub-integrating sphere and the main integrating sphere.

Images