Antireflection optical device and method of use

Abstract

This application provides an anti-reflective light device and its usage method, applied to a low-light night vision telescope. The anti-reflective light device includes a first polarizer assembly and a second polarizer assembly. The first polarizer assembly is disposed at the front end of the lens of the low-light night vision telescope. The end of the first polarizer assembly facing away from the low-light night vision telescope is connected to the second polarizer assembly. The second polarizer assembly rotates relative to the first polarizer assembly to adjust the polarization angle and eliminate reflected light. By setting a first polarizer assembly and a second polarizer assembly that can rotate relative to each other, the first polarizer assembly is fixed at the front end of the lens of the low-light night vision telescope. By rotating the second polarizer assembly to adjust the polarization angle between it and the first polarizer assembly, the real-time polarization angle of the glass reflected light can be precisely matched, achieving the filtering and elimination of reflected light. The field of view is free of reflected light glare and ghosting, significantly improving the clarity and purity of the observed image.

Description

Technical Field

[0001] This application belongs to the technical field of night vision observation equipment, specifically relating to an anti-reflective light device and its usage method. Background Technology

[0002] Low-light night vision telescopes utilize low-light enhancement technology to achieve clear observation in low-light environments and are widely used in security monitoring, outdoor observation, scientific research, and other scenarios. However, when using a low-light night vision telescope to observe outdoor objects through glass (such as window glass), the glass surface produces strong reflected light. This reflected light enters the telescope's imaging system and superimposes with the low-light signal of the outdoor scene, severely inhibiting the imaging effect of the target. This makes it impossible for the observer to clearly distinguish the scene outside the window, significantly reducing the usability of low-light night vision telescopes in scenarios with glass obstructions.

[0003] Currently, most commercially available polarizers have a single, fixed structure and cannot be flexibly adjusted according to the polarization angle of the light reflected from the glass. This means that when using low-light night vision telescopes to observe scenes outside glass windows, they cannot adaptively fine-tune based on the real-time polarization state of the ambient light.

[0004] Therefore, there is an urgent need for a simple, easy-to-operate, and highly adaptable anti-reflection light device to solve the problem of reflected light interference when observing through glass with a low-light night vision telescope. Summary of the Invention

[0005] Therefore, the purpose of this application is to provide an anti-reflective light device and a method of using it, which at least solves one of the technical problems mentioned in the background art.

[0006] To address the aforementioned issues, this application provides an anti-reflective light device for use in low-light night vision telescopes. The anti-reflective light device includes a first polarizer assembly and a second polarizer assembly. The first polarizer assembly is disposed at the front end of the lens of the low-light night vision telescope, and the end of the first polarizer assembly facing away from the low-light night vision telescope is connected to the second polarizer assembly. The second polarizer assembly rotates relative to the first polarizer assembly to adjust the polarization angle and eliminate reflected light.

[0007] Optionally, the first polarizer assembly includes a connecting ring, which has a first end and a second end. The first end of the connecting ring is inserted into the front end of the lens of the low-light night vision telescope, so that the first polarizer assembly is mounted on the low-light night vision telescope. The second end of the connecting ring is provided with a sliding locking member. The second polarizer assembly includes an adjusting ring, which has a connecting end. The outer circumferential surface of the connecting end of the adjusting ring is provided with a groove extending in the circumferential direction. The connecting end of the adjusting ring is inserted into the second end of the connecting ring, so that the sliding locking member extends into the groove.

[0008] Optionally, the slide is an arc-shaped slide with a central angle of 90°, so that the adjusting ring can be adjusted relative to the connecting ring within the range of 0° to 90°.

[0009] Optionally, the first polarizer assembly further includes a first polarizer, which is embedded in the second end of the connecting ring.

[0010] Optionally, the second end of the connecting ring is provided with at least two first polarizer fasteners along the circumferential direction, and the first polarizer fasteners are rotated radially to tighten the first polarizer.

[0011] Optionally, the outer peripheral surface of the first end of the connecting ring is provided with an external thread, and the front end of the lens of the low-light night vision telescope is provided with an internal thread. The external thread and the internal thread cooperate to screw the first end of the connecting ring onto the front end of the lens of the low-light night vision telescope.

[0012] Optionally, the second polarizer assembly includes a second polarizer, and the adjustment ring further includes an assembly end, wherein the second polarizer is embedded in the inner wall of the assembly end of the adjustment ring.

[0013] Optionally, the assembly end of the adjusting ring is provided with at least two second polarizer fasteners in the circumferential direction, and the second polarizer fasteners are rotated radially to tighten the second polarizer.

[0014] Optionally, both the first polarizer and the second polarizer are optical-grade polarizing filters with a transmittance ≥85% and a polarization extinction ratio ≥10000:1.

[0015] A second aspect of this application provides a method of using an anti-reflective light device, employing any one of the anti-reflective light devices described above, comprising: Connect the anti-reflective light device to the front end of the lens of the low-light night vision telescope; Point the lens of the low-light night vision telescope at the glass surface of the area to be observed and make the lens face the outdoor scene. The reflected light generated by the glass surface enters the lens of the low-light night vision telescope along with the light from the outdoor scene, forming reflected light interference. Rotate the second polarizer assembly so that it rotates relative to the first polarizer assembly until the glass reflection light in the field of view is completely eliminated and the outdoor scene is clearly imaged, then stop rotating the second polarizer assembly.

[0016] By employing the above technical solution, the present invention has at least the following beneficial effects: This application provides an anti-reflection light device and its usage method. By setting a first polarizer assembly and a second polarizer assembly that can rotate relative to each other, the first polarizer assembly is fixed to the front end of the lens of a low-light night vision telescope. By rotating the second polarizer assembly to adjust the polarization angle between it and the first polarizer assembly, the real-time polarization angle of the glass reflected light can be precisely matched, thereby filtering and eliminating the reflected light. This completely solves the problem that conventional fixed polarizers cannot adapt to changes in the polarization state of reflected light and that reflected light interference is difficult to remove. It ensures that when observing objects outside a glass window in a low-light environment, there is no glare or ghosting from reflected light, significantly improving the clarity and purity of the observed image. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the anti-reflective light device installed on a low-light night vision telescope according to an embodiment of this application; Figure 2 This is a split view of the anti-reflective light device according to an embodiment of this application; Figure 3 This is a split diagram of the anti-reflective light device according to an embodiment of this application (excluding the pressure ring and O-ring); Figure 4 This is a cross-sectional view of the anti-reflective light device according to an embodiment of this application; Figure 5 This is an observational diagram showing the effect of glass reflection light not being eliminated according to an embodiment of this application; Figure 6 This is an observational diagram showing the effect of eliminating glass reflection light according to an embodiment of this application.

[0018] The reference numerals in the attached figures are as follows: 1. First polarizer assembly; 101. Connecting ring; 102. Sliding locking element; 103. First polarizer; 104. First polarizer fastener; 105. First polarizer retaining ring; 2. Second polarizer assembly; 201. Adjusting ring; 202. Slide groove; 203. Second polarizer; 204. Second polarizer retaining ring; 205. O-ring; 3. Low-light night vision telescope. Detailed Implementation

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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 limiting the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] See also Figures 1 to 4 As shown, according to a first aspect of the embodiments of this application, an anti-reflective light device is provided, which is applied to a low-light night vision telescope 3. The anti-reflective light device includes a first polarizer assembly 1 and a second polarizer assembly 2. The first polarizer assembly 1 is disposed at the front end of the lens of the low-light night vision telescope 3, and the second polarizer assembly 2 is connected to the end of the first polarizer assembly 1 facing away from the low-light night vision telescope 3. The second polarizer assembly 2 rotates relative to the first polarizer assembly 1 to adjust the polarization angle to eliminate reflected light.

[0024] By setting up a first polarizer assembly 1 and a second polarizer assembly 2 that can rotate relative to each other, the first polarizer assembly 1 is fixed to the front end of the lens of the low-light night vision telescope 3. By rotating the second polarizer assembly 2 to adjust the polarization angle between it and the first polarizer assembly 1, the real-time polarization angle of the glass reflected light can be precisely matched, thereby filtering and eliminating the reflected light. This completely solves the problem that conventional fixed polarizers cannot adapt to changes in the polarization state of reflected light and that reflected light interference is difficult to remove. It ensures that when observing objects outside the glass window in a low-light environment, there is no glare or ghosting from reflected light, significantly improving the clarity and purity of the observed image.

[0025] The first polarizer assembly 1 is disposed at the front end of the lens of the low-light night vision telescope 3, and the two are connected by a thread. After the first polarizer assembly 1 is assembled to the front end of the lens of the low-light night vision telescope 3, the first polarizer assembly 1 is coaxially aligned with the lens of the low-light night vision telescope 3, which effectively avoids the problems of polarization filtering deviation and observation image deviation caused by assembly offset.

[0026] The first polarizer assembly 1, which is away from the low-light night vision telescope 3, is connected to the second polarizer assembly 2 by a rotatable connection structure. This ensures that the second polarizer assembly 2 can rotate around the central axis of the first polarizer assembly 1 without loosening, shifting, or jamming during rotation. This ensures the stability and accuracy of polarization angle adjustment and meets the requirements for polarization adjustment accuracy in low-light observation scenarios.

[0027] In another embodiment, the first polarizer assembly includes a connecting ring 101, which has a first end and a second end. The first end of the connecting ring 101 is inserted into the front end of the lens of the low-light night vision telescope 3 so that the first polarizer assembly is mounted on the low-light night vision telescope 3. The second end of the connecting ring 101 is provided with a sliding locking member 102. The second polarizer assembly includes an adjusting ring 201, which has a connecting end. A groove 202 extending circumferentially is formed on the outer peripheral surface of the connecting end of the adjusting ring 201. The connecting end of the adjusting ring 201 is inserted into the second end of the connecting ring 101 so that the sliding locking member 102 extends into the groove 202.

[0028] The connecting ring 101 is a circular ring with a first end outer diameter smaller than the second end outer diameter to form a stepped structure, so that after the first end of the connecting ring 101 is inserted into the front end of the lens of the low-light night vision telescope 3, the outer peripheral surface of the second end of the connecting ring 101 can be flush with the outer peripheral surface of the lens of the low-light night vision telescope.

[0029] The second end of the connecting ring 101 is provided with a sliding locking member 102. The second end of the connecting ring 101 has a threaded hole, and the sliding locking member 102 is radially threaded into the threaded hole. When the sliding locking member 102 is rotated in the first direction, the sliding locking member 102 rotates and moves towards the center of the circle. When the sliding locking member 102 is rotated in the second direction, the sliding locking member 102 rotates and moves away from the circle.

[0030] The second polarization component includes an adjustment ring 201, which is a circular ring. The outer diameter of its connecting end is smaller than that of its mounting end to form a stepped structure, so that after the adjustment ring 201 is connected to the connecting ring 101, the outer circumferential surface of the mounting end of the adjustment ring 201 is flush with the outer circumferential surface of the second end of the connecting ring 101. A groove 202 extending circumferentially is formed on the outer circumferential surface of the connecting end of the adjustment ring 201. The connecting end of the adjustment ring 201 is inserted into the second end of the connecting ring 101, so that the sliding locking member 102 extends into the groove 202. When the adjustment ring 201 is rotated, the sliding locking member 102 can slide in the groove 202, so that the adjustment ring 201 can rotate relative to the connecting ring 101 to adjust the polarization angle.

[0031] Specifically, the screw of the sliding locking member 102 has at least a portion of unmachined threads at the end opposite to the nut, so that the unmachined threaded portion of the sliding locking member 102 is located in the groove 202, ensuring that the surface of the groove 202 is not worn during relative rotation.

[0032] Specifically, the outer surface of the mounting end of the adjustment ring 201 is provided with anti-slip texture to increase the friction between the user's hand and the adjustment ring 201. Especially in observation scenarios such as low light and night, the user's hands are prone to sweating and slipping. The anti-slip texture can effectively prevent the user from slipping or losing force when rotating the adjustment ring 201, ensuring that the user can smoothly and accurately control the rotation angle of the adjustment ring 201 and quickly adjust it to the optimal polarization position that matches the reflected light from the glass.

[0033] In specific adjustment, first rotate the sliding locking member 102 to move it along the second direction, so that the end of the sliding locking member 102 separates from the bottom of the groove 202; rotate the adjusting ring 201, at which time the sliding locking member 102 can slide in the groove 202, so that the adjusting ring 201 can rotate relative to the connecting ring 101 to achieve the adjustment of the polarization angle; after adjustment, rotate the sliding locking member 102 to move it along the first direction to press against the bottom of the groove 202.

[0034] In another embodiment, the slide 202 is an arc-shaped slide with a central angle of 90°, allowing the adjusting ring 201 to be adjusted relative to the connecting ring 101 within the range of 0° to 90°. When the polarization direction angle between the first polarizer assembly 1 and the second polarizer assembly 2 is within the range of 0° to 90°, continuous adjustment from no filtering to complete extinction can be achieved, precisely matching the dynamic changes in the polarization angle of the reflected light and achieving the effect of completely eliminating reflected light. If the adjustment angle exceeds 90°, the polarization direction adjustment will fail, not only failing to improve the extinction effect but also potentially filtering out effective low-light signals from outdoor objects, affecting the clarity of observation.

[0035] In another embodiment, the first polarizer assembly 1 further includes a first polarizer 103, which is embedded in the second end of the connecting ring 101.

[0036] The first polarizer 103 is embedded in the second end of the connecting ring 101. The embedded installation structure can ensure that the first polarizer 103 and the connecting ring 101 are coaxially aligned, avoiding the first polarizer 103 from shifting or loosening, ensuring the stability of polarization filtering, and at the same time forming an effective protection for the first polarizer 103 to prevent it from being affected by external collisions and wear, thus protecting its optical performance.

[0037] The connecting ring 101 has at least two first polarizer fasteners 104 arranged circumferentially at its second end. The first polarizer fasteners 104 are rotated radially to tighten the first polarizer 103. When the first polarizer fasteners 104 are rotated radially, they can tighten the first polarizer 103 embedded in the second end of the connecting ring 101. By simultaneously tightening the first polarizer 103 with at least two circumferentially evenly distributed first polarizer fasteners 104, the first polarizer 103 can be subjected to a uniform tightening force, avoiding damage or deformation of the first polarizer 103 due to excessive local force.

[0038] In another embodiment, the outer circumferential surface of the first end of the connecting ring 101 is provided with an external thread, and the front end of the lens of the low-light night vision telescope 3 is provided with an internal thread. The external thread and the internal thread cooperate to screw the first end of the connecting ring 101 onto the front end of the lens of the low-light night vision telescope 3. The threaded connection method allows for detachable connection with the lens of the low-light night vision telescope 3, which is simple in structure, convenient to assemble and disassemble, and can be adapted to low-light night vision telescopes 3 of different specifications, thus possessing good versatility and practicality.

[0039] In another embodiment, the second polarizer assembly 2 includes a second polarizer 203, and the adjustment ring 201 further includes an assembly end, wherein the second polarizer 203 is embedded in the inner wall of the assembly end of the adjustment ring 201.

[0040] The second polarizer 203 is embedded in the assembly end of the adjustment ring 201. The embedded installation structure ensures that the second polarizer 203 and the adjustment ring 201 remain coaxially aligned, preventing the second polarizer 203 from shifting or loosening, thus ensuring the stability of polarization filtering. At the same time, it can effectively protect the second polarizer 203 from external collisions and wear, preventing it from affecting its optical performance.

[0041] The adjusting ring 201 has at least two second polarizer fasteners circumferentially arranged at its assembly end. These fasteners rotate radially to tighten the second polarizer 203. When the second polarizer fasteners rotate radially, they tighten the second polarizer 203 embedded within the assembly end of the adjusting ring 201. The simultaneous tightening by at least two circumferentially evenly distributed second polarizer fasteners ensures that the second polarizer 203 receives a uniform tightening force, preventing damage or deformation due to excessive localized force.

[0042] In another embodiment, both the first polarizer 103 and the second polarizer 203 are optical-grade polarizing filters with a transmittance ≥85% and a polarization extinction ratio ≥10000:1. The transmittance of ≥85% maximizes the retention of effective low-light signals from outdoor objects, adapting to the observation requirements of low-light night vision telescopes and ensuring the brightness and integrity of the observed image. On the other hand, the high parameter requirement of a polarization extinction ratio ≥10000:1 significantly improves the accuracy and effectiveness of polarization filtering, effectively blocking stray light such as glass reflections and completely eliminating glare and ghosting interference caused by reflected light.

[0043] In another embodiment, the first polarizer assembly 1 further includes a first polarizer retaining ring 105, which is sleeved on the outer peripheral surface of the first polarizer 103 and fits against the inner wall of the second end of the connecting ring 101 to ensure that the first polarizer 103 does not shift or loosen after being embedded and installed.

[0044] The second polarizer assembly 2 also includes a second polarizer retaining ring 204, which is sleeved on the outer circumferential surface of the second polarizer 203 and fits against the inner wall of the assembly end of the adjusting ring 201 to ensure that the second polarizer 203 does not shift or loosen after being embedded and installed.

[0045] An O-ring is provided between the inner wall of the second end of the connecting ring 101 and the outer periphery of the connecting end of the adjusting ring 201. Specifically, it is embedded in the annular groove of the mating surface of the two (the annular groove is opened on the inner surface of the second end of the connecting ring 101 or the outer surface of the connecting end of the adjusting ring 201) to seal the mating gap between the two and prevent dust, moisture and other impurities from entering the device.

[0046] A second aspect of this application provides a method for using an anti-reflective light device, employing any one of the anti-reflective light devices described above, comprising the following steps: Step S1: Connect the anti-reflective light device to the front of the lens of the low-light night vision telescope 3.

[0047] The anti-reflective light device is connected to the low-light night vision telescope 3 by threading the connecting ring 101 of the first polarizer assembly 1 to the front end of the lens.

[0048] Step S2: Aim the lens of the low-light night vision telescope 3 at the glass surface of the area to be observed, and point the lens towards the outdoor scene. The reflected light generated by the glass surface enters the lens of the low-light night vision telescope 3 along with the light from the outdoor scene, forming reflected light interference, such as... Figure 5 As shown.

[0049] Point the lens of the low-light night vision telescope 3 at the glass surface of the area to be observed, and adjust the angle of the low-light night vision telescope 3 so that the lens of the low-light night vision telescope 3 is perpendicular to the glass surface. This ensures that the lens of the low-light night vision telescope 3 is facing the outdoor scene. At this time, the glass surface is illuminated by ambient low light (nighttime moonlight, streetlights, indoor diffused light, etc.) and produces reflected light, which will enter the lens of the low-light night vision telescope 3 along with the effective low light signal of the outdoor scene, forming obvious glare, ghosting and other reflected light interference.

[0050] Step S3: Rotate the second polarizer assembly 2 so that it rotates relative to the first polarizer assembly 1 until the glass reflection light in the field of view is completely eliminated and the outdoor scene is clearly imaged, then stop rotating the second polarizer assembly 2.

[0051] First, rotate the sliding locking member 102 along the second direction to separate the end of the sliding locking member 102 from the bottom of the groove 202; the user holds the anti-slip texture of the mounting end of the adjusting ring 201 and slowly rotates the second polarizer assembly 2 so that it rotates relative to the first polarizer assembly 1. During the rotation, continuously observe the field of view of the low-light night vision telescope 3. Since the groove 202 is an arc-shaped groove with a central angle of 90°, the adjusting ring 201 can only be adjusted within the range of 0° to 90°, which can accurately cover the conventional polarization angle range of glass reflection light; when the glass reflection light in the field of view is completely eliminated and the outdoor scene is clearly imaged and details are discernible, stop rotating the second polarizer assembly 2. At this time, the angle between the polarization directions of the first polarizer 103 and the second polarizer 203 reaches the optimal extinction angle. Rotate the sliding locking member 102 along the first direction so that its end presses against the bottom of the groove 202, so that the second polarizer assembly 2 is fixed relative to the first polarizer assembly 1. Figure 6 As shown.

[0052] Step S4: During the observation process, if the polarization state of the ambient light changes (such as the streetlights being turned on, the moonlight shifting, the indoor lighting being adjusted, etc.), causing the glass reflection light to reappear, the operation of step 3 can be repeated until the glass reflection light in the observation field is completely eliminated and the outdoor scene is clearly imaged.

[0053] This embodiment achieves complete extinction, thoroughly resolving the limitation of conventional fixed polarizers in adapting to changes in the polarization state of reflected light. This significantly improves the clarity and purity of low-light observations, allowing observers to clearly distinguish subtle features of objects outside the window. It also enables adaptive adaptation to dynamic ambient light, ensuring good observation results in various low-light scenarios and enhancing the device's practicality and adaptability.

[0054] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An anti-reflective light device, characterized in that, The anti-reflection device for a low-light night vision telescope (3) includes a first polarizer assembly (1) and a second polarizer assembly (2). The first polarizer assembly (1) is disposed at the front end of the lens of the low-light night vision telescope (3). The second polarizer assembly (2) is connected to the end of the first polarizer assembly (1) away from the low-light night vision telescope (3). The second polarizer assembly (2) rotates relative to the first polarizer assembly (1) to adjust the polarization angle to eliminate reflected light.

2. The anti-reflective light device according to claim 1, characterized in that, The first polarizer assembly includes a connecting ring (101), which has a first end and a second end. The first end of the connecting ring (101) is inserted into the front end of the lens of the low-light night vision telescope (3) so that the first polarizer assembly is mounted on the low-light night vision telescope (3). The second end of the connecting ring (101) is provided with a sliding locking member (102). The second polarizer assembly includes an adjusting ring (201), which has a connecting end. The outer circumferential surface of the connecting end of the adjusting ring (201) is provided with a groove (202) extending in the circumferential direction. The connecting end of the adjusting ring (201) is inserted into the second end of the connecting ring (101) so that the sliding locking member (102) extends into the groove (202).

3. The anti-reflective light device according to claim 2, characterized in that, The slide (202) is an arc-shaped slide with a central angle of 90°, so that the adjusting ring (201) can be adjusted relative to the connecting ring (101) within the range of 0° to 90°.

4. The anti-reflective light device according to claim 2, characterized in that, The first polarizer assembly (1) further includes a first polarizer (103), which is embedded in the second end of the connecting ring (101).

5. The anti-reflective light device according to claim 4, characterized in that, The second end of the connecting ring (101) is provided with at least two first polarizer fasteners (104) in the circumferential direction, and the first polarizer fasteners (104) are rotated in the radial direction to tighten the first polarizer (103).

6. The anti-reflective light device according to claim 2, characterized in that, The first end of the connecting ring (101) is provided with an external thread on its outer peripheral surface, and the front end of the lens of the low-light night vision telescope (3) is provided with an internal thread. The external thread and the internal thread cooperate to screw the first end of the connecting ring (101) onto the front end of the lens of the low-light night vision telescope (3).

7. The anti-reflective light device according to claim 4, characterized in that, The second polarizer assembly (2) includes a second polarizer (203), and the adjustment ring (201) also includes an assembly end, wherein the second polarizer (203) is embedded in the inner wall of the assembly end of the adjustment ring (201).

8. The anti-reflective light device according to claim 7, characterized in that, The assembly end of the adjusting ring (201) is provided with at least two second polarizer fasteners in the circumferential direction, and the second polarizer fasteners are rotated in the radial direction to tighten the second polarizer (203).

9. The anti-reflective light device according to claim 7, characterized in that, Both the first polarizer (103) and the second polarizer (203) are optical-grade polarizing filters with a transmittance ≥85% and a polarization extinction ratio ≥10000:

1.

10. A method of using an anti-reflective light device, characterized in that, The anti-reflective light device according to any one of claims 1 to 9 comprises: Connect the anti-reflective light device to the front end of the lens of the low-light night vision telescope (3); Point the lens of the low-light night vision telescope (3) at the glass surface of the area to be observed and make the lens face the outdoor scene. The reflected light generated by the glass surface enters the lens of the low-light night vision telescope (3) along with the light from the outdoor scene, forming reflected light interference. Rotate the second polarizer assembly (2) so that the second polarizer assembly (2) rotates relative to the first polarizer assembly (1) until the glass reflection light in the field of view is completely eliminated and the outdoor scene is clearly imaged, then stop rotating the second polarizer assembly (2).

Images