Multi-picture multi-scene night vision mirror tester

Abstract

The application discloses a kind of multi-picture multi-scene night vision mirror tester, comprising: collimating lens, liquid crystal display screen drive circuit board, power supply circuit and operation control display component, backlight LED array drive control circuit, backlight circuit board, light guide plate, light uniformity component, attenuation piece, liquid crystal screen, night vision mirror lens barrel observation port, touch display screen, operation control button, power switch and shell.Liquid crystal display screen drive circuit board is electrically connected with liquid crystal screen;Liquid crystal display screen drive circuit board and backlight LED array drive control circuit are electrically connected with power supply circuit and operation control display component respectively;Backlight LED array drive control circuit is electrically connected with backlight circuit board.The application can provide different graphic picture, different night scene characteristic video image night vision mirror simulation test device, which can be used for infinite distance focusing adjustment, and can also simulate night scene or dynamic video image, for experiencing feeling simulation actual night environment complex scene.

Description

Technical Field

[0001] This invention relates to the technical field of night vision goggle testing, and in particular to a multi-view, multi-scene night vision goggle testing instrument. Background Technology

[0002] Night vision goggle testing devices are typically used for infinity focusing adjustment of night vision goggles and for quantitative testing and calibration of target resolution in environments with varying illumination levels. Currently, a typical night vision goggle testing device consists of a test light source, a patterned target, a collimating lens, a light source control circuit, and related structures. By pointing the night vision goggle at the testing instrument and adjusting the objective lens focal length and eyepiece diopter, a patterned target with different illumination intensities at what is equivalent to infinity can be clearly seen. Ordinary night vision goggle testing devices generally have three illumination intensity levels: high brightness (e.g., 10 lx), low brightness (e.g., 0.1 lx), and low brightness (e.g., 0.001 lx). These illumination changes are achieved by varying the brightness of the relevant projection light source. The spectrum of the light source in ordinary night vision goggle testing devices is generally fixed and designed according to relevant standards, such as an A-type light source with a color temperature of 2856 K or an LED light source with the same color temperature. Patterned targets are generally standard test patterns for night vision goggles, such as the US Air Force USAF 1951 test target. These patterns are fixed and cannot be changed. Very few night vision goggle test devices use a limited number of three or more fixed patterned targets, which are changed through mechanical movement.

[0003] Ordinary night vision goggle testing devices cannot generate images or dynamic videos that simulate real nighttime environments, nor can they change the color temperature or spectrum of light. Real nighttime images not only exhibit significant variations in sky illumination brightness, but also in the optically equivalent spectrum of night vision goggles. For example, the spectra of evening sky light, full moon light, and starlight without a moon differ considerably. The experience of observing a real target with night vision goggles is vastly different from observing a test target with an ordinary night vision goggle testing device, which ordinary devices cannot reflect or simulate. Therefore, ordinary night vision goggle testing devices can only be used for infinity focusing adjustment of night vision goggles and quantitative testing and calibration of target resolution in environments with different illumination levels; they lack practical experience capabilities and cannot be used to simulate real-world nighttime environments. Summary of the Invention

[0004] To address the above problems, this invention proposes a multi-view, multi-scene night vision goggle tester.

[0005] To achieve the purpose of this invention, a multi-view, multi-scene night vision goggle tester is provided, comprising: a collimating lens, a liquid crystal display driving circuit board, a power supply circuit and an operation control display component, a backlight LED array driving control circuit, a backlight circuit board, a light guide plate, a light homogenizing component, an attenuator, a liquid crystal screen, a night vision goggle barrel observation port, a touch display screen, operation control buttons, a power switch, and a housing.

[0006] The collimating lens, LCD screen driver circuit board, power supply circuit and operation control display component, backlight LED array driver control circuit, backlight circuit board, light guide plate, light homogenizing component, attenuator, and LCD screen are all located inside the housing; the night vision goggle barrel observation port, touch screen, operation control button, and power switch are all located on the outer surface of the housing.

[0007] The collimating lens, LCD screen, attenuator, light homogenizing assembly, light guide plate, and backlight circuit board are arranged sequentially. The light-emitting side of the collimating lens is located away from the LCD screen. The observation port of the night vision goggle is located near the light-emitting side of the collimating lens. The observation port of the night vision goggle, the collimating lens, LCD screen, attenuator, light homogenizing assembly, light guide plate, and backlight circuit board are located on the same optical axis. The display image plane of the LCD screen is located at the focal point of the collimating lens.

[0008] The liquid crystal display driving circuit board is electrically connected to the liquid crystal display; the liquid crystal display driving circuit board and the backlight LED array driving control circuit are respectively electrically connected to the power supply circuit and the operation control display component; the backlight LED array driving control circuit is electrically connected to the backlight circuit board.

[0009] The touch screen, operation control buttons, and power switch are electrically connected to the power circuit and operation control display components, respectively.

[0010] Furthermore, it also includes:

[0011] External communication data interface and auxiliary night vision goggle power supply interface;

[0012] The external communication data interface and the auxiliary night vision goggle power supply interface are located on the outer surface of the housing;

[0013] The external communication data interface and the auxiliary night vision goggle power supply interface are electrically connected to the power supply circuit and the operation control display component.

[0014] Furthermore, the collimating lens includes: a plurality of lenses and a cemented lens; the focal length range of the collimating lens is 60-150mm; the aperture of the collimating lens is greater than 30mm.

[0015] Furthermore, the liquid crystal display driving circuit board includes: a liquid crystal display driving device, an image and video data storage device, and a display control device.

[0016] Furthermore, the power supply circuit and operation control display components include: a power supply, an operation control panel device, and a touch screen device.

[0017] Furthermore, the backlight circuit board includes: NIR near-infrared LED, G green LED, B blue LED, and R red LED.

[0018] Furthermore, the NIR near-infrared LED uses a wavelength range of 700nm to 780nm, the G green LED uses a wavelength range of 520nm to 530nm, the B blue LED uses a wavelength range of 450nm to 470nm, and the R red LED uses a wavelength range of 620nm to 630nm.

[0019] Furthermore, the light-diffusing component includes a diffuser plate and a diffuser film.

[0020] Furthermore, the attenuator is a neutral attenuator with a transmittance of less than 1% in the range of 450nm to 900nm.

[0021] This invention uses an ultra-high resolution video image display LCD screen instead of a graphic target. The display surface of the LCD screen needs to be precisely installed and adjusted at the focal position of the collimating lens to form a collimator structure, providing an infinity target for the night vision goggles. A high-resolution LCD screen of suitable size, resolution, and color control capabilities must be selected. The selected LCD screen parameters and collimating lens focal length must meet the minimum resolution requirements of the fixed test pattern, such as 0.5 mrad. It also needs to meet the minimum field of view requirements of the night vision goggles for simulating nighttime environmental scenes. This is achieved through the LCD screen's backlight circuit board and video image driving, storage, and control circuits, along with touch screen and keyboard operation controls. Night vision goggles users can see multiple fixed standard test patterns in the collimating lens's optical path. The brightness and contrast of these patterns meet standard requirements, including specific chromaticity such as 2856K, and specific illuminance levels such as high brightness (e.g., 10 lx), low brightness (e.g., 0.1 lx), and low light intensity (e.g., 0.001 lx). They can also see pre-stored dynamic video images simulating actual nighttime environmental target scenes.

[0022] In nighttime environments, starlight spectra cover a very wide range, including visible light, near-infrared, and infrared. Since night vision goggles operate within a spectral range of 450nm to 930nm, the night vision goggle testing instrument needs to cover this region. However, completely simulating nighttime targets and displaying high-contrast modulated video images is extremely difficult. Liquid crystal displays (LCDs) are not self-emissive devices; the displayed spectrum is largely determined by the backlight source. Because most LCD pixel light valves only effectively switch light below 800nm, achieving a contrast ratio of 200:1, their switching effectiveness drops significantly above 850nm, essentially losing its function. Therefore, the backlight circuit board of this invention controls the spectral energy before 800nm. If necessary, a narrow-band filter is added to the backlight circuit board to eliminate spectral energy above 800nm; otherwise, the contrast of the displayed image observed by the night vision goggle will be reduced.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] This invention adds functions such as test image change, video display, and simulated ambient light source change control to the basic night vision goggle testing device. It includes functions such as infinite distance focusing adjustment of the night vision goggle, quantitative testing and calibration of target resolution in different illumination environments, and analysis and judgment of night vision goggle imaging accuracy and optical performance. It can also generate simulated scenes or dynamic video images for experiencing complex simulated real-world nighttime environments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of a multi-view, multi-scene night vision goggle tester according to one embodiment;

[0026] Figure 2 This is a schematic diagram of the external structure of a multi-view, multi-scene night vision goggle tester according to one embodiment;

[0027] Figure 3 This is a schematic diagram of the LED arrangement on the backlight circuit board of a multi-view, multi-scene night vision goggle tester according to one embodiment.

[0028] Reference numerals: 100-collimating lens, 200-LCD display driver circuit board, 300-operation control display component, 400-backlight LED array driver control circuit, 500-backlight circuit board, 600-light guide plate, 700-light homogenizing component, 800-attenuator, 900-LCD screen, 510-NIR near-infrared LED, 520-G green LED, 530-B blue LED, 540-R red LED, 010-night vision goggle observation window, 020-touch display screen, 030-control operation buttons, 040-power switch, 050-external communication data port, 060-auxiliary night vision goggle power supply interface, 070-housing. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] refer to Figure 1 , Figure 2 As shown, the present invention provides a multi-view, multi-scene night vision goggle tester, comprising: a collimating lens 100, a liquid crystal display driving circuit board 200, a power supply circuit and operation control display component 300, a backlight LED array driving control circuit 400, a backlight circuit board 500, a light guide plate 600, a light homogenizing component 700, an attenuator 800, a liquid crystal screen 900, a night vision goggle barrel observation port 010, a touch display screen 020, operation control buttons 030, a power switch 040, and a housing 070;

[0032] The LCD screen driver circuit board 200 includes LCD screen driving, image and video data storage, and display control. The power supply circuit and operation control display assembly 300 includes all the power supplies required by the product's circuit system, the operation control panel and touch screen, controllers for controlling other circuits, and communication ports. The backlight LED array driver control circuit 400 includes a multi-spectral LED array. The light guide plate 600 disperses, conducts, and evenly distributes the light from the LED array throughout the backlight area. The light homogenizing assembly 700, composed of a diffuser plate or diffuser film, diffuses and further homogenizes the light from the light guide plate. The night vision goggle's observation port 010 has two windows, one on the left and one on the right, corresponding to the two lenses of the night vision goggle. The touch screen 020 is used to display the operation control program selection interface.

[0033] The collimating lens 100, LCD screen driver circuit board 200, power supply circuit and operation control display component 300, backlight LED array driver control circuit 400, backlight circuit board 500, light guide plate 600, light homogenizing component 700, attenuator 800, and LCD screen 900 are all disposed inside the housing 070; the night vision goggle barrel observation port 010, touch screen 020, operation control button 030, and power switch 040 are all disposed on the outer surface of the housing 070.

[0034] The collimating lens 100, LCD screen 900, attenuator 800, light homogenizing assembly 700, light guide plate 600, and backlight circuit board 500 are arranged sequentially. The light-emitting side of the collimating lens 100 is located away from the LCD screen 900. The night vision goggle's observation port 010 is located near the light-emitting side of the collimating lens 100. The night vision goggle's observation port 010, the collimating lens 100, LCD screen 900, attenuator 800, light homogenizing assembly 700, light guide plate 600, and backlight circuit board 500 are located on the same optical axis. The display image plane of the LCD screen 900 is located at the focal point of the collimating lens 100.

[0035] The liquid crystal display driving circuit board 200 is electrically connected to the liquid crystal screen 900; the liquid crystal display driving circuit board 200 and the backlight LED array driving control circuit 400 are respectively electrically connected to the power supply circuit and the operation control display component 300; the backlight LED array driving control circuit 400 is electrically connected to the backlight circuit board 500.

[0036] The touch screen 020, operation control button 030, and power switch 040 are electrically connected to the power circuit and operation control display component 300, respectively.

[0037] In one embodiment, it also includes:

[0038] External communication data interface 050 and auxiliary night vision goggle power supply interface 060;

[0039] The external communication data interface 050 and the auxiliary night vision goggle power supply interface 060 are disposed on the outer surface of the housing 070;

[0040] The external communication data interface 050 and the auxiliary night vision goggle power supply interface 060 are electrically connected to the power supply circuit and the operation control display component 300.

[0041] The external communication data interface 050 can be connected to the stored video signal; the auxiliary night vision goggle power supply interface 060 is the auxiliary night vision goggle power supply interface.

[0042] In one embodiment, the collimating lens 100 includes: a plurality of lenses and a cemented lens; the focal length range of the collimating lens 100 is 60-150mm; and the aperture of the collimating lens 100 is greater than 30mm.

[0043] In one embodiment, the liquid crystal display driver circuit board 200 includes: a liquid crystal display driver, an image and video data storage device, and a display control device.

[0044] In one embodiment, the power supply circuit and operation control display component 300 includes: a power supply, an operation control panel device, and a touch screen device.

[0045] In one embodiment, such as Figure 3 As shown, the backlight circuit board 500 includes: NIR near-infrared LED 510, G green LED 520, B blue LED 530, and R red LED 540.

[0046] In one embodiment, the NIR LED 510 uses a wavelength band of 700nm to 780nm, the G green LED 520 uses a wavelength band of 520nm to 530nm, the B blue LED 530 uses a wavelength band of 450nm to 470nm, and the R red LED 540 uses a wavelength band of 620nm to 630nm.

[0047] In one embodiment, the light-diffusing component 700 includes a diffuser plate and a diffuser film.

[0048] In one embodiment, the attenuator 800 is a neutral attenuator with a transmittance of less than 1% in the 450nm to 900nm range.

[0049] In one embodiment, a multi-view, multi-scene night vision goggle tester is provided. This device can simulate and test night vision goggles by providing different graphic images and video images of different nighttime scene characteristics. It can be used for infinity-distance focusing adjustment, quantitative testing and calibration of target resolution in different illumination environments, and analysis and judgment of night vision goggle imaging accuracy and optical performance. It can also simulate nighttime scenes or dynamic video images to allow users to experience and understand complex simulated real-world nighttime environments. The actual product adopts a portable design, can be wall-mounted or placed on a table, and is equipped with a power conversion circuit module, using 220VAC mains power.

[0050] Unlike existing ordinary night vision goggle testing instruments, this device uses an ultra-high resolution video image display LCD screen instead of a fixed pattern target, and a programmable multi-point and continuously varying dynamic spectrum LED light source instead of a traditional A-source light source or a fixed spectrum light source composed of a group of LEDs with fixed brightness ratios. It also adds storage and display driving circuits for multiple standard night vision goggle test patterns and simulated experience video images, and has the function of inputting, storing, and recalling customer-supplied scene videos.

[0051] The simulated target environment illuminance index of the product of this invention can be detected and calibrated through the observation window of the night vision goggle. Compared to directly measuring the illuminance of the pure white image output from the LCD screen (the environmental illuminance index that needs to be measured), there is a deviation between the illuminance value obtained through the observation window of the night vision goggle and the actual illuminance value. However, since the proportion of this deviation remains constant under different illuminance conditions, this proportion can be obtained by testing during the assembly of the collimating lens. This proportion is noted as a key parameter in the product manual or specifications for easy later testing and calibration. This testing and calibration process is simpler and more direct than that of ordinary night vision goggle testers because ordinary night vision goggle testers use graphic targets with images, not completely blank ones. Testing and calibration require first placing a completely blank target at the position of the graphic target to obtain the environmental illuminance index, then replacing it with the graphic target, installing the collimating lens, and obtaining the illuminance value through the night vision goggle observation window to finally obtain the aforementioned proportion data. Therefore, testing similar proportion values ​​involves more influencing factors.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] It should be noted that the terms "first," "second," and "third" used in the embodiments of this application are merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first," "second," and "third" can be interchanged in a specific order or sequence where permitted. It should be understood that the objects distinguished by "first," "second," and "third" can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein.

[0054] The terms "comprising" and "having," and any variations thereof, in this application are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or modules is not limited to the steps or modules listed, but may optionally include steps or modules not listed, or may optionally include other steps or modules inherent to such processes, methods, products, or devices.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-view, multi-scene night vision goggle testing instrument, characterized in that, include: Collimating lens (100), LCD screen driver circuit board (200), power supply circuit and operation control display assembly (300), backlight LED array driver control circuit (400), backlight circuit board (500), light guide plate (600), light homogenizing assembly (700), attenuator (800), LCD screen (900), night vision goggle barrel observation port (010), touch screen (020), operation control button (030), power switch (040) and housing (070); The collimating lens (100), liquid crystal display driving circuit board (200), power supply circuit and operation control display component (300), backlight LED array driving control circuit (400), backlight circuit board (500), light guide plate (600), light homogenizing component (700), attenuator (800), and liquid crystal screen (900) are all disposed inside the housing (070); the night vision goggle barrel observation port (010), touch screen (020), operation control button (030), and power switch (040) are all disposed on the outer surface of the housing (070); The collimating lens (100), liquid crystal screen (900), attenuator (800), light homogenizing assembly (700), light guide plate (600), and backlight circuit board (500) are arranged sequentially. The light-emitting side of the collimating lens (100) is located away from the liquid crystal screen (900). The observation port (010) of the night vision goggle is located near the light-emitting side of the collimating lens (100). The observation port (010), collimating lens (100), liquid crystal screen (900), attenuator (800), light homogenizing assembly (700), light guide plate (600), and backlight circuit board (500) are located on the same optical axis. The display image plane of the liquid crystal screen (900) is located at the focal position of the collimating lens (100). The liquid crystal display driving circuit board (200) is electrically connected to the liquid crystal screen (900); the liquid crystal display driving circuit board (200) and the backlight LED array driving control circuit (400) are electrically connected to the power supply circuit and the operation control display component (300) respectively; the backlight LED array driving control circuit (400) is electrically connected to the backlight circuit board (500). The touch screen (020), operation control button (030) and power switch (040) are electrically connected to the power circuit and operation control display component (300), respectively; The backlight circuit board (500) includes: NIR near-infrared LED (510), G green LED (520), B blue LED (530), and R red LED (540). The NIR near-infrared LED (510) uses a wavelength range of 700nm to 780nm, the G green LED (520) uses a wavelength range of 520nm to 530nm, the B blue LED (530) uses a wavelength range of 450nm to 470nm, and the R red LED (540) uses a wavelength range of 620nm to 630nm.

2. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, Also includes: External communication data interface (050) and auxiliary night vision goggle power supply interface (060); The external communication data interface (050) and the auxiliary night vision goggle power supply interface (060) are disposed on the outer surface of the housing (070); The external communication data interface (050) and the auxiliary night vision goggle power supply interface (060) are electrically connected to the power supply circuit and the operation control display component (300).

3. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, The collimating lens (100) includes: a plurality of lenses and a cemented lens; the focal length range of the collimating lens (100) is 60-150mm; the aperture of the collimating lens (100) is greater than 30mm.

4. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, The liquid crystal display driver circuit board (200) includes: a liquid crystal display driver, an image and video data storage device, and a display control device.

5. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, The power supply circuit and operation control display assembly (300) includes: a power supply, an operation control panel device, and a touch screen device.

6. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, The light-diffusing component (700) includes a diffuser plate and a diffuser film.

7. The multi-view, multi-scene night vision goggle testing instrument according to claim 1, characterized in that, The attenuator (800) is a neutral attenuator with a transmittance of less than 1% in the range of 450nm to 900nm.

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