Aperture and low-light level night vision device for image intensifier

Abstract

The utility model discloses an aperture for an image intensifier and a low-light night vision device, and relates to the technical field of optical elements, systems or instruments.The aperture for the image intensifier comprises a mounting mechanism, a blade assembly and an adjusting mechanism, the mounting mechanism is used for being arranged on a light path of the image intensifier, and the interior of the mounting mechanism is through along the light path; the blade assembly is movably mounted in the mounting mechanism and is provided with a light through hole, and the light through hole is formed in a light path; the adjusting mechanism is arranged on the mounting mechanism, the adjusting mechanism is connected with the blade assembly, and the adjusting mechanism is used for controlling the blade assembly to move, so that the size of the light through hole is changed, and the luminous flux entering the image intensifier on the light path is changed. According to the aperture for the image intensifier, the luminous flux entering the image intensifier is flexibly adjusted by adjusting the size of the light through hole so as to adapt to environments with different illumination intensities, the limitation of a micropore plastic sleeve with a fixed aperture in the prior art is effectively solved, and the applicability and the reliability of a low-light night vision device are enhanced.

Description

Technical Field

[0001] This application relates to the technical field of optical components, systems or instruments, and particularly to an aperture for an image intensifier and a low-light night vision device. Background Art

[0002] A low-light night vision device is an observation device designed specifically for night or low-light environments. It amplifies weak natural light, such as moonlight or starlight, through an image intensifier to generate a clear visible image.

[0003] An image intensifier is the core component of a low-light night vision device and is highly sensitive to photons. In a strong light environment, if appropriate protective measures are not taken, the image intensifier will be damaged by excessive light, affecting the performance and reliability of the device. Currently, the protection measure usually adopts a microporous plastic sleeve with a fixed aperture. Although this design can reduce the light flux to a certain extent, due to the non-adjustable aperture, it limits the application flexibility of the low-light night vision device under different light intensities. In addition, the microporous plastic sleeve needs to be installed in a high light flux environment and removed in other cases, which is inconvenient to use and easily lost. Summary of the Utility Model

[0004] The purpose of this application is to provide an aperture for an image intensifier, which can flexibly adjust the light flux entering the image intensifier by adjusting the size of the light passing hole to adapt to different light intensity environments, effectively solving the limitations of the fixed-aperture microporous plastic sleeve in the prior art and enhancing the applicability and reliability of the low-light night vision device. Another purpose of this application is to provide a low-light night vision device.

[0005] To achieve the above purpose, this application provides an aperture for an image intensifier, including:

[0006] A mounting mechanism for being arranged on the light path of the image intensifier, and the inside of the mounting mechanism is penetrated along the light path;

[0007] A blade assembly movably installed inside the mounting mechanism, the blade assembly is provided with a light passing hole, and the light passing hole is on the light path;

[0008] An adjusting mechanism arranged in the mounting mechanism, the adjusting mechanism is connected to the blade assembly, and the adjusting mechanism is used to control the movement of the blade assembly so that the size of the light passing hole changes to change the light flux entering the image intensifier on the light path.

[0009] In some embodiments, the blade assembly includes a plurality of blade monomers, and the light passing hole is formed between the blade monomers.

[0010] In some embodiments, the blade unit is arranged in an arc shape, the inner side of the blade unit is a concave arc edge, and a plurality of the concave arc edges enclose to form the light passing hole, and the light passing hole is circular; and / or,

[0011] The light passing hole is arranged to be circular, and the central axis of the light passing hole is arranged to coincide with the light path.

[0012] In some embodiments, a rotating shaft is provided at the first end of the blade unit, and the blade unit is rotationally connected to the mounting mechanism through the rotating shaft; the blade assembly is used to change the size of the light passing hole through rotational movement under the control of the adjusting mechanism.

[0013] In some embodiments, a power shaft is provided at the second end of the blade unit; the adjusting mechanism cooperates with the power shaft, and the adjusting mechanism is used to apply a force to the power shaft to control the rotation of the blade unit relative to the mounting mechanism.

[0014] In some embodiments, the adjusting mechanism includes:

[0015] A turntable, rotatably installed inside the mounting mechanism, a driving groove is provided on the turntable, the driving groove faces the power shaft, and the driving groove is used to drive the power shaft to move when the turntable rotates relative to the mounting mechanism, so that the blade unit rotates relative to the mounting mechanism.

[0016] In some embodiments, the number of the driving grooves is multiple, the multiple driving grooves are arranged along the circumferential direction of the turntable, the distance between adjacent driving grooves is the same, and the driving grooves correspond to and cooperate with the power shaft on the blade unit; and / or,

[0017] The adjusting mechanism further includes an adjusting outer ring, the adjusting outer ring is rotatably installed outside the mounting mechanism, a pin is provided on the adjusting outer ring, and the adjusting outer ring is connected to the turntable through the pin.

[0018] In some embodiments, the mounting mechanism includes:

[0019] A base, on the light path, an external interface is provided at the first end of the base, a mounting port is provided at the second end of the base, and the base is installed in the low-light night vision device through the external interface;

[0020] An end cover, detachably connected to the base, and the end cover is used to cover the mounting port.

[0021] In some embodiments, a first thread is provided on the outer side of the external interface, a second thread is provided on the inner side of the mounting port, and the specifications of the first thread and the second thread are the same; and / or,

[0022] The adjustment mechanism comprises an adjustment outer ring; in the radial direction of the aperture perpendicular to the light path, the outer diameter surface of the base is lower than the outer diameter surface of the adjustment outer ring; and / or,

[0023] The adjustment mechanism includes an adjustment outer ring; on the light path, an anti-pressure distance is left between the external interface and the adjustment outer ring; and / or,

[0024] The adjusting mechanism comprises a latch; a limiting hole is provided on the base, the limiting hole is extended along the circumference of the base, and the limiting hole cooperates with the latch to limit the movement range of the adjusting mechanism; and / or,

[0025] The adjustment mechanism includes a turntable; a ring platform for rotationally connecting with the blade assembly is provided inside the base; the blade assembly is located between the turntable and the ring platform; a mounting groove is provided on the inner wall of the base, and the mounting groove is located on the side of the turntable facing away from the ring platform on the light path; the mounting mechanism also includes a retaining ring, which is provided in the mounting groove and is used to stop the turntable on the side of the blade assembly facing the external interface; and / or,

[0026] The aperture further comprises a protective sheet, which is arranged inside the base and covers a side of the blade assembly facing the mounting opening.

[0027] The present application also provides a low-light-level night vision device, comprising an image intensifier and the above-mentioned aperture for the image intensifier, wherein the aperture is arranged on the light path of the image intensifier, and the aperture is used to adjust the light flux entering the image intensifier on the light path.

[0028] Compared with the above-mentioned background technology, the aperture for the image intensifier provided in the present application mainly includes a mounting mechanism, a blade assembly and an adjustment mechanism. The mounting mechanism is used to be arranged on the light path of the image intensifier, and the interior of the mounting mechanism passes through along the light path; the blade assembly is movably mounted inside the mounting mechanism, and the blade assembly is provided with a light-through hole, which is on the light path; the adjustment mechanism is arranged on the mounting mechanism, and the adjustment mechanism is connected to the blade assembly. The adjustment mechanism is used to control the movement of the blade assembly to change the size of the light-through hole to change the light flux entering the image intensifier on the light path.

[0029] In traditional low-light night vision devices, the image intensifier is prone to damage in strong light environments due to its high sensitivity to photons, resulting in a decline in device performance. To protect the image intensifier, a microporous plastic sleeve with a fixed aperture is usually used to reduce the light flux. However, this method has obvious drawbacks: it cannot adapt to environments with different light intensities, limiting the flexibility and scope of use of the night vision device. Users need to install the microporous plastic sleeve in high light flux environments and remove it in other cases. This process is not only inconvenient but also increases the risk of losing accessories of the device.

[0030] To address this issue, the aperture technical solution provided in this application realizes flexible control of the light flux entering the image intensifier through the design of an innovative installation mechanism, blade assembly, and adjustment mechanism. The installation mechanism is directly set on the optical path of the image intensifier to ensure the consistency of the aperture and the optical path. The design of the light passing holes inside the blade assembly allows light to pass through, and their sizes can be adjusted as needed. The adjustment mechanism is connected to the blade assembly, and by controlling the movement of the blade assembly, the change in the size of the light passing holes is achieved, thereby finely adjusting the light flux.

[0031] The advantage of this design is that it allows users to quickly and conveniently adjust the aperture according to the actual lighting conditions to adapt to different observation environments. In strong light environments, by reducing the size of the light passing holes, the amount of light entering the image intensifier can be reduced to protect the device from damage; in low light environments, increasing the light passing holes allows more light to enter, improving the clarity of observation. The introduction of this adjustment mechanism not only solves the inconvenience and limitations brought by the fixed aperture plastic sleeve but also significantly improves the applicability and reliability of the low-light night vision device, enabling it to play a role in a wider range of application scenarios.

[0032] Combined with the above structure and process description, it can be seen that the aperture for the image intensifier has at least the following beneficial effects: The aperture for the image intensifier flexibly adjusts the light flux entering the image intensifier by adjusting the size of the light passing holes to adapt to environments with different light intensities, effectively solving the limitations of the fixed aperture microporous plastic sleeve in the prior art and enhancing the applicability and reliability of the low-light night vision device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative efforts.

[0034] Figure 1 Schematic diagram of the aperture for the image intensifier provided by the embodiment of the present application;

[0035] Figure 2 Schematic diagram of the aperture for the image intensifier provided by the embodiment of the present application from another perspective;

[0036] Figure 3 Schematic diagram of the blade assembly provided by the embodiment of the present application;

[0037] Figure 4 Schematic diagram of the single blade provided by the embodiment of the present application;

[0038] Figure 5 Exploded view of the aperture for the image intensifier provided by the embodiment of the present application;

[0039] Figure 6 Exploded view of the installation mechanism and the adjustment mechanism provided by the embodiment of the present application.

[0040] Wherein:

[0041] Installation mechanism 1, base 11, external interface 111, first thread 1111, installation port 112, second thread 1121, limit hole 113, installation groove 114, ring platform 115, end cover 12, retaining ring 13,

[0042] Blade assembly 2, light passing hole 201, single blade 21, concave arc edge 211, rotating shaft 22, power shaft 23,

[0043] Adjustment mechanism 3, turntable 31, drive groove 311, adjustment outer ring 32, pin 33. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0045] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0046] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 is the schematic diagram of the aperture for the image intensifier provided by the embodiment of the present application, Figure 2 is the schematic diagram of the aperture for the image intensifier provided by the embodiment of the present application from another perspective.

[0047] In Figure 1 and Figure 2In the figure, with reference to the overall structure of the aperture, the directions of the front end and the rear end are marked, and this direction can be regarded as the light direction of the aperture. When the aperture is installed in a low-light night vision device, this direction can also be regarded as the light direction of the low-light night vision device. Additionally, at the front end, the direction along the order from the front end to the rear end can be regarded as the direction in which light enters the aperture; at the rear end, continuing along the order from the front end to the rear end, it can be regarded as the direction in which light leaves the aperture and enters the image intensifier in the low-light night vision device.

[0048] After defining the relationships of the above directions, it is clear that light enters at the front end of the aperture, the rear end of the aperture is installed in the low-light night vision device, and the aperture is located on the front side of the image intensifier. After light enters the aperture from the front to the rear, it then enters the image intensifier backward.

[0049] It should be noted that the direction relationships regarding the front and the rear in this embodiment all follow the above rules.

[0050] In the first specific implementation manner, as Figure 1 and Figure 2 shown, the aperture for an image intensifier provided by the solution of the embodiment of the present application mainly includes a mounting mechanism 1, a vane assembly 2, and an adjusting mechanism 3. The mounting mechanism 1 is used to be arranged on the light path of the image intensifier, and the interior of the mounting mechanism 1 is penetrated along the light path; the vane assembly 2 is movably installed inside the mounting mechanism 1, the vane assembly 2 is provided with a light passing hole 201, and the light passing hole 201 is on the light path; the adjusting mechanism 3 is arranged in the mounting mechanism 1, the adjusting mechanism 3 is connected to the vane assembly 2, and the adjusting mechanism 3 is used to control the movement of the vane assembly 2 to change the size of the light passing hole 201 so as to change the light flux entering the image intensifier on the light path.

[0051] In traditional low-light night vision devices, due to the high sensitivity of the image intensifier to photons, it is easily damaged in strong light environments, resulting in a decline in device performance. To protect the image intensifier, a microporous plastic sleeve with a fixed aperture is usually used to reduce the light flux, but this method has obvious defects: it cannot adapt to environments with different light intensities, restricting the flexibility and range of use of the night vision device. Users need to install the microporous plastic sleeve in a high light flux environment and remove it in other cases. This process is not only inconvenient but also increases the risk of losing accessories of the device.

[0052] To address this issue, the aperture technical solution provided in this application realizes flexible control of the light flux entering the image intensifier through the innovative designs of the mounting mechanism 1, the vane assembly 2, and the adjustment mechanism 3. The mounting mechanism 1 is directly set on the optical path of the image intensifier to ensure the consistency between the aperture and the optical path. The light passing hole 201 designed inside the vane assembly 2 allows light to pass through, and its size can be adjusted as needed. The adjustment mechanism 3 is connected to the vane assembly 2, and by controlling the movement of the vane assembly 2, the change in the size of the light passing hole 201 is realized, thereby finely adjusting the light flux.

[0053] The advantage of this design is that it allows users to quickly and conveniently adjust the aperture according to the actual lighting conditions to adapt to different observation environments. In a strong light environment, by reducing the size of the light passing hole 201, the amount of light entering the image intensifier can be reduced to protect the device from damage; in a low light environment, increasing the size of the light passing hole 201 can allow more light to enter, improving the clarity of observation. The introduction of this adjustment mechanism not only solves the inconveniences and limitations brought by the fixed-aperture plastic sleeve but also significantly improves the applicability and reliability of the low-light night vision device, enabling it to play a role in a wider range of application scenarios.

[0054] Combined with the above structural and process descriptions, it can be seen that the aperture for the image intensifier has at least the following beneficial effects: The aperture for the image intensifier flexibly adjusts the light flux entering the image intensifier by adjusting the size of the light passing hole 201 to adapt to different light intensity environments, effectively solving the limitations of the fixed-aperture micro-hole plastic sleeve in the prior art, and enhancing the applicability and reliability of the low-light night vision device.

[0055] It should be noted that the adjustment mechanism of the light passing hole 201 is not limited in this embodiment. For example, it can be a structure where the vane assembly 2 completely covers the light passing hole 201, and the size adjustment of the light passing hole 201 is completed through the movement of the vane assembly 2; it can also be that under the movement of the vane assembly 2, the vane assembly 2 and the mounting mechanism 1 together complete the size adjustment of the light passing hole 201. At this time, the light passing hole 201 is formed by the vane assembly 2 and the mounting mechanism 1 together. For example, the vane assembly 2 and the mounting mechanism 1 enclose to form the light passing hole 201. Therefore, no matter what adjustment mechanism the light passing hole 201 adopts, it should fall within the scope of the description of this embodiment.

[0056] In addition, the specific structure and movement form of the vane assembly 2 are not limited in this embodiment. For example, for the specific structure, the movable structure can be a block structure or a sheet structure; for the movement form, the movable structure can adopt a moving movement form or a rotating movement form; as long as the size adjustment of the light passing hole 201 can be realized in a certain state of movement. Therefore, different embodiments of the vane assembly 2 should also fall within the scope of the description of this application.

[0057] Please refer to Figure 3 , Figure 3 which is a schematic diagram of the blade assembly provided by the embodiment of the present application.

[0058] In some embodiments, the blade assembly 2 includes a plurality of blade monomers 21, and a light passing hole 201 is formed between the blade monomers 21.

[0059] In this embodiment, the design feature of the aperture lies in the composition of the blade assembly 2, which is composed of a plurality of independent blade monomers 21. There are gaps between these blade monomers 21, and these gaps together form the light passing hole 201. By adjusting the relative positions between the blade monomers 21, the size of the light passing hole 201 can be changed, thereby controlling the amount of light entering the image intensifier through the aperture.

[0060] Specifically, the design of the blade monomer 21 allows for precise control of the opening and closing degree of the light passing hole 201. The arrangement and combination of the blade monomers 21 determine the size and shape of the light passing hole 201, enabling the aperture to be adjusted accordingly according to different ambient light conditions. For example, the blade monomers 21 are arranged along the circumference of the aperture, and the blade monomers 21 are stacked and connected in the light direction, thus enclosing to form the light passing hole 201.

[0061] It should be noted that this embodiment does not limit the shape, size, and number of the blade monomers 21, as long as the size of the light passing hole 201 can be adjusted in a certain state of movement by a plurality of blade monomers 21. Therefore, the blade monomers 21 in different embodiments should also fall within the scope of the description of the present application.

[0062] Optionally, the blade monomer 21 is set to be arc-shaped, the inner side of the blade monomer 21 is a concave arc edge 211, and a plurality of concave arc edges 211 envelope to form the light passing hole 201, and the light passing hole 201 is circular.

[0063] In this embodiment, the blade monomer 21 is designed as an arc-shaped structure, and its feature is that the inner side of each blade monomer 21 has a concave arc edge 211. When these concave arc edges 211 approach each other, their contours envelope each other to form a circular light passing hole 201. This design allows for adjusting the size of the light passing hole 201 by changing the relative angle or position between the blade monomers 21, and achieving precise control of the amount of light passing through the aperture.

[0064] In addition, the circular light passing hole 201 provides a symmetric light transmission path, which can maintain the uniformity of the light field during the adjustment process, helps to improve the light guiding effect, and thus obtains a higher quality image in the low-light night vision device.

[0065] In some embodiments, the light passing hole 201 is set to be circular, and the central axis of the light passing hole 201 is set to coincide with the light path.

[0066] In this embodiment, on the basis that the circular light-transmitting hole 201 helps to provide a uniform light distribution, the central axis of the circular light-transmitting hole 201 is further set to coincide with the light path. Through this precise centering design, it is ensured that the light can pass through the aperture along the most direct path, reducing the scattering and loss of light before entering the image intensifier.

[0067] Please refer to Figure 4 , Figure 4 which is a schematic diagram of the single blade provided by the embodiment of the present application.

[0068] In some embodiments, a rotating shaft 22 is provided at the first end of the single blade 21. The single blade 21 is rotationally connected to the mounting mechanism 1 through the rotating shaft 22; the blade assembly 2 is used to change the size of the light-transmitting hole 201 through rotational movement under the control of the adjusting mechanism 3.

[0069] In this embodiment, the design feature of the single blade 21 includes the provision of a rotating shaft 22 at its first end. This rotating shaft 22 is the connection point between the single blade 21 and the mounting mechanism 1, allowing the single blade 21 to rotate around the rotating shaft 22. Through this rotational connection, the single blade 21 can perform rotational movement under the control of the adjusting mechanism 3.

[0070] The blade assembly 2 is composed of a plurality of such single blades 21, and its design enables the entire blade assembly 2 to adjust the size of the light-transmitting hole 201 through rotational movement. When the adjusting mechanism 3 applies a control force, it causes the single blade 21 to rotate, thereby changing the positional relationship between the single blades 21 and realizing the change in the size of the light-transmitting hole 201.

[0071] This rotation mechanism provides a simple and effective way to adjust the aperture opening, thereby controlling the amount of light entering the image intensifier. The rotational movement of the single blade 21 enables the size of the light-transmitting hole 201 of the aperture to vary continuously to adapt to different lighting conditions and observation requirements. This design enhances the adjustment flexibility of the aperture and ensures that the low-light night vision device can maintain good imaging performance in various lighting environments.

[0072] In some embodiments, a power shaft 23 is provided at the second end of the single blade 21; the adjusting mechanism 3 cooperates with the power shaft 23, and the adjusting mechanism 3 is used to apply a force to the power shaft 23 to control the rotation of the single blade 21 relative to the mounting mechanism 1.

[0073] In this embodiment, a power shaft 23 is specially designed at the second end of the blade unit 21. This design allows the blade unit 21 to be adjusted more precisely under the action of the adjusting mechanism 3. The cooperation of the power shaft 23 and the adjusting mechanism 3 enables the adjusting mechanism 3 to apply a force to the power shaft 23, and this force is transmitted through the power shaft 23 to control the rotation of the blade unit 21 relative to the mounting mechanism 1.

[0074] By providing the power shaft 23, the adjustment ability of the blade assembly 2 is enhanced, enabling the aperture to achieve more precise and diverse light flux control according to the actual light conditions and observation requirements. The force application mechanism of the adjusting mechanism 3 can be manual or automatic, depending on the design and application scenario of the aperture. This design improves the adaptability and imaging quality of the low-light night vision device in different environments.

[0075] In some cases, mounting holes are provided at both ends of the blade unit 21, and the rotating shaft 22 and the power shaft 23 are mounted in the mounting holes in a crimping form. The rotating shaft 22 and the power shaft 23 can adopt rod-shaped structures with the same length and diameter.

[0076] Please refer to Figure 5 and Figure 6 , where Figure 5 is an exploded view of the aperture for the image intensifier provided by the embodiment of the present application, Figure 6 is an exploded view of the mounting mechanism and the adjusting mechanism provided by the embodiment of the present application.

[0077] In some embodiments, the adjusting mechanism 3 includes:

[0078] A turntable 31, rotatably mounted inside the mounting mechanism 1. A driving groove 311 is provided on the turntable 31, and the driving groove 311 faces the power shaft 23. The driving groove 311 is used to drive the power shaft 23 to move when the turntable 31 rotates relative to the mounting mechanism 1, so that the blade unit 21 rotates relative to the mounting mechanism 1.

[0079] In this embodiment, the design of the adjusting mechanism 3 includes the turntable 31, which is rotatably mounted inside the mounting mechanism 1. The function of the turntable 31 is to be part of the adjusting mechanism 3. Through the interaction between the driving groove 311 thereon and the power shaft 23, the rotational movement of the turntable 31 is converted into the rotational movement of the blade unit 21. The driving groove 311 is specially designed to face the power shaft 23 to ensure that when the turntable 31 rotates relative to the mounting mechanism 1, it can drive the corresponding power shaft 23 to move.

[0080] This design allows the turntable 31 to directly control the power shaft 23 connected to the single blade 21 through the drive slot 311 thereon. When the turntable 31 rotates, the interaction between the drive slot 311 and the power shaft 23 causes the single blade 21 to rotate around its rotating shaft 22, thereby realizing the position change of the single blade 21 relative to the mounting mechanism 1. This position change further affects the relative positions between the single blades 21, resulting in a change in the size of the light transmission holes 201 to adapt to different lighting conditions.

[0081] In some cases, the drive slot 311 is in the form of a rectangular slot. When the outer adjustment ring 32 is rotated, the turntable 31 rotates accordingly, and then pushes the single blade 21 to rotate around the rotating shaft 22 fixed on the base 11. During this period, the power shaft 23 of the single blade 21 makes rotational and linear sliding motions in the rectangular slot 311.

[0082] In some embodiments, the number of drive slots 311 is multiple, and the multiple drive slots 311 are arranged along the circumferential direction of the turntable 31. The spacing between adjacent drive slots 311 is the same, and the drive slots 311 are correspondingly matched with the power shafts 23 on the single blades 21.

[0083] In this embodiment, the designs of the adjustment mechanism 3 and the blade assembly 2 are further refined. Among them, the turntable 31 is equipped with multiple drive slots 311, which are evenly arranged along the circumferential direction of the turntable 31, ensuring that the spacing between each drive slot 311 remains consistent. This equal layout helps to achieve uniform control of the single blades 21.

[0084] Each drive slot 311 is correspondingly matched with the power shaft 23 on the single blade 21. This corresponding relationship means that each single blade 21 has a specific drive slot 311 to match it, thereby ensuring the motion synchronization and accuracy of the single blades 21. When the turntable 31 rotates, each drive slot 311 interacts with the corresponding power shaft 23 respectively, driving the single blades 21 to rotate in a coordinated manner.

[0085] The advantage of this design is to provide a fine adjustment mechanism, allowing individual and synchronous control of each single blade 21, so that the size of the light transmission holes 201 can be accurately adjusted. This precise control is crucial for adapting to different lighting conditions and achieving high-quality imaging effects. Through the setting of multiple drive slots 311, the aperture can achieve a smoother and more continuous adjustment process, improving the adaptability and reliability of the low-light night vision device in different environments.

[0086] In some cases, the number of single blades 21 is sixteen. The number of drive slots 311 is sixteen.

[0087] In some cases, the minimum aperture of the light transmission hole 201 is 1 - 1.5 mm, and the maximum aperture is 21 mm.

[0088] In some embodiments, the adjusting mechanism 3 further includes an adjusting outer ring 32 which is rotatably mounted outside the mounting mechanism 1. The adjusting outer ring 32 is provided with pins 33, and the adjusting outer ring 32 is connected to the turntable 31 through the pins 33.

[0089] In this embodiment, the design of the adjusting mechanism 3 is further extended to include an adjusting outer ring 32. The adjusting outer ring 32 is designed to be rotatably mounted outside the mounting mechanism 1. Such a layout allows users to directly operate the adjusting mechanism 3 from the outside, facilitating quick adjustment.

[0090] The adjusting outer ring 32 is specially designed with pins 33. These pins 33 are the connecting elements between the adjusting outer ring 32 and the turntable 31. Through these pins 33, the adjusting outer ring 32 can be connected to the turntable 31 to form an effective mechanical connection. When the adjusting outer ring 32 is rotated, the force transmitted through the pins 33 will cause the turntable 31 to rotate, thereby driving the interaction between the driving groove 311 and the power shaft 23 to realize the rotation of the single blade 21.

[0091] This design provides a simple adjustment method, enabling users to indirectly control the position of the single blade 21 by operating the adjusting outer ring 32, thereby adjusting the size of the light passing hole 201. The combined use of the adjusting outer ring 32 and the pins 33 not only improves the convenience of adjustment but also makes the entire aperture adjustment mechanism more compact and efficient.

[0092] In some embodiments, the mounting mechanism 1 includes:

[0093] A base 11. On the optical path, the first end of the base 11 is provided with an external interface 111, and the second end of the base 11 is provided with a mounting opening 112. The base 11 is mounted in the low-light night vision device through the external interface 111;

[0094] An end cap 12 which is detachably connected to the base 11. The end cap 12 is used to cover the mounting opening 112.

[0095] In this embodiment, the mounting mechanism 1 is composed of the base 11 and the end cap 12, jointly constituting the basic structure of the aperture. The base 11 is the main supporting component of the mounting mechanism 1. It is arranged on the optical path to ensure that the aperture can accurately control the amount of light entering the image intensifier. The first end of the base 11 is provided with an external interface 111, which is the interface for mounting the base 11 into the low-light night vision device. The second end of the base 11 is provided with a mounting opening 112, which is the opening for loading the components required for the aperture into the interior of the base 11.

[0096] The end cap 12 is designed to be detachably connected to the base 11. Such a design allows users to conveniently install, disassemble, and maintain the aperture. The main function of the end cap 12 is to cover the mounting opening 112, protect the internal components from the external environment, and also helps to maintain the sealing and stability of the entire aperture.

[0097] Through this design, the mounting mechanism 1 not only provides a stable platform to support the vane assembly 2 and the adjustment mechanism 3, but also ensures that the aperture can be conveniently integrated into the low-light night vision device, while facilitating daily use and maintenance. This structural design improves the practicality and reliability of the aperture, enabling it to adapt to different usage scenarios and requirements.

[0098] In some embodiments, a first thread 1111 is provided on the outer side of the outer interface 111, and a second thread 1121 is provided on the inner side of the mounting opening 112. The first thread 1111 and the second thread 1121 have the same specifications.

[0099] In this embodiment, the design features of the outer interface 111 and the mounting opening 112 of the mounting mechanism 1 are that they are respectively provided with threads. A first thread 1111 is provided on the outer side of the outer interface 111, while a second thread 1121 is provided on the inner side of the mounting opening 112. The design of these two threads has the same specifications, which is more convenient for production and management.

[0100] The first thread 1111 allows the base 11 to be threadedly connected to the corresponding component of the low-light night vision device through the outer interface 111, and at the same time, the end cap 12 can be threadedly connected to the mounting opening 112 of the base 11 through the second thread 1121 on its inner side. This threaded connection method not only provides structural stability but also allows for quick installation and disassembly, facilitating users to perform maintenance and adjustment.

[0101] In some cases, the specifications of the first thread 1111 and the second thread 1121 are 30.4 mm × 0.8 mm.

[0102] In some embodiments, in the radial direction perpendicular to the optical path of the aperture, the outer diameter surface of the base 11 is lower than the outer diameter surface of the adjustment outer ring 32.

[0103] In this embodiment, the design of the aperture takes into account the convenience of user operation. Specifically, in the radial direction perpendicular to the optical path of the aperture, the outer diameter surface of the base 11 is designed to be lower than the outer diameter surface of the adjustment outer ring 32. Such a design makes the surface of the adjustment outer ring 32 protrude radially from the base 11, making it easier for users to manually control and operate.

[0104] Adjusting the protruding design of the outer diameter surface of the outer ring 32 provides users with an intuitive physical interface, enabling them to quickly recognize and locate the outer ring 32 when touching. This design not only improves the convenience of operation but also enhances the interaction experience between the user and the aperture. Users can directly touch and rotate the outer ring 32 to change the size of the light passing hole 201, achieving rapid adjustment of the light transmission amount.

[0105] In some cases, the maximum diameter of the outer ring 32 is 38.8 mm. The outer ring 32 is not only larger in diameter than the base 11 but also slightly larger in diameter than other structural components of the low-light night vision device, such as the objective lens, etc., facilitating quick finding of the outer ring 32 for adjustment when using the low-light night vision device for observation.

[0106] Optionally, both the base 11 and the outer ring 32 are provided with circumferentially spaced grooves on the outside, which function to facilitate gripping and manual control by increasing friction.

[0107] In some embodiments, there is a pressure prevention distance left between the outer interface 111 and the outer ring 32 on the light path.

[0108] In this embodiment, the mounting mechanism 1 of the aperture is specifically designed with a pressure prevention distance between the outer interface 111 and the outer ring 32. The main purpose of this design is to prevent the structures on the low-light night vision device from squeezing the outer ring 32 after the aperture is installed on the low-light night vision device, affecting the rotation of the outer ring 32.

[0109] In some cases, the pressure prevention distance is a gap of 0.2 mm.

[0110] In some embodiments, the base 11 is provided with a limiting hole 113, which extends circumferentially along the base 11. The limiting hole 113 cooperates with the pin 33 to limit the movement range of the adjusting mechanism 3.

[0111] In this embodiment, the design of the base 11 includes the limiting holes 113, which extend circumferentially along the base 11. Such a layout allows the limiting holes 113 to cooperate with the pins 33 in the adjusting mechanism 3. Specifically, the function of the limiting holes 113 is to limit the movement range of the pins 33, ensuring that the adjusting mechanism 3 does not exceed the predetermined adjustment angle during operation.

[0112] By restricting the circumferential angle of the pins 33 through the limiting holes 113, the rotation angle of the outer ring 32 connected to the pins 33 can be indirectly controlled, which helps to improve the structural integrity of the entire aperture and prevent damage or functional failure caused by improper operation of the adjusting mechanism 3.

[0113] In some embodiments, an annular platform 115 for rotatably connecting with the blade assembly 2 is provided inside the base 11; the blade assembly 2 is located between the turntable 31 and the annular platform 115; an installation groove 114 is provided on the inner wall of the base 11, and in the optical path, the installation groove 114 is located on the side of the turntable 31 facing away from the annular platform 115; the installation mechanism 1 further includes a retaining ring 13, the retaining ring 13 is arranged in the installation groove 114, and the retaining ring 13 is used to stop the turntable 31 on the side of the blade assembly 2 facing the outer interface 111.

[0114] In this embodiment, the design of the base 11 is further refined, which includes an annular platform 115. This annular platform 115 is located inside the base 11 and is designed for rotatably connecting with the blade assembly 2. The annular platform 115 is provided with holes, allowing the rotating shaft 22 on the blade unit 21 to be inserted therein and rotatably assembled, so as to realize the rotational movement of the blade assembly 2.

[0115] The blade assembly 2 is arranged between the turntable 31 and the annular platform 115, and such a layout enables the blade assembly 2 to be adjusted under the drive of the turntable 31.

[0116] The retaining ring 13 is arranged in the installation groove 114. The main function of the retaining ring 13 is to stop the turntable 31 on the side of the blade assembly 2 facing the outer interface 111, preventing the turntable 31 from axially moving or disengaging during the adjustment process, ensuring the stability of the adjustment mechanism 3 and the safety of operation.

[0117] Through this design, the base 11, the annular platform 115, the installation groove 114 and the retaining ring 13 together constitute a structurally stable and reliable installation mechanism 1, providing precise guidance and limitation for the rotation and adjustment of the blade assembly 2, and at the same time ensuring the stability and durability of the entire aperture during the adjustment process.

[0118] In some embodiments, the aperture further includes a protection sheet, the protection sheet is arranged inside the base 11, and the protection sheet covers the side of the blade assembly 2 facing the installation port 112.

[0119] In this embodiment, the design of the aperture further enhances the protection of the blade assembly 2. The protection sheet is arranged inside the base 11 and covers the side of the blade assembly 2 facing the installation port 112. Such a layout provides a physical barrier for the blade assembly 2 to protect it from damage or contamination, especially considering that the blade assembly 2 is thin in thickness and relatively fragile in structure and requires additional protection.

[0120] In addition, the end cap 12 is designed to be detachable, which provides convenience for users and makes the process of replacing the protective sheet simple and quick. Users only need to remove the end cap 12 to easily access and replace the protective sheet without the need for more complex disassembly work. Such a design not only reduces the maintenance difficulty but also reduces the risk of damage to the aperture that may be caused by replacing the protective sheet.

[0121] In some cases, a circular quartz glass design is adopted to provide transparent and wear-resistant protection for the blade assembly 2, ensuring that the aperture can maintain efficient and clear imaging performance even in harsh environments.

[0122] This application also provides a low-light night vision device, including an image intensifier and the above-mentioned aperture for the image intensifier. The aperture is arranged on the light path of the image intensifier, and the aperture is used to adjust the light flux entering the image intensifier on the light path.

[0123] This low-light night vision device includes the above-mentioned aperture for the image intensifier and should have all the beneficial effects of the above-mentioned aperture for the image intensifier, which will not be elaborated here one by one.

[0124] It should be noted that many components mentioned in this application are common standard components or components known to those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0125] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0126] The above has introduced in detail the aperture for the image intensifier and the low-light night vision device provided by this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An aperture for an image intensifier, characterized in that, Comprising: An installation mechanism (1) for being arranged on the optical path of an image intensifier, and the inside of the installation mechanism (1) penetrates along the optical path; A blade assembly (2) movably installed inside the installation mechanism (1), the blade assembly (2) being provided with a light passing hole (201), and the light passing hole (201) being on the optical path; An adjustment mechanism (3) arranged on the installation mechanism (1), the adjustment mechanism (3) being connected to the blade assembly (2), and the adjustment mechanism (3) being used to control the movement of the blade assembly (2) so that the size of the light passing hole (201) changes to change the light flux entering the image intensifier on the optical path.

2. The aperture for an image intensifier according to claim 1, wherein The blade assembly (2) includes a plurality of blade monomers (21), and the light passing hole (201) is formed between the blade monomers (21).

3. The aperture for an image intensifier according to claim 2, characterized in that, The blade monomer (21) is arranged in an arc shape, the inner side of the blade monomer (21) is a concave arc edge (211), and a plurality of the concave arc edges (211) envelope to form the light passing hole (201), and the light passing hole (201) is circular; and / or, The light passing hole (201) is arranged in a circular shape, and the central axis of the light passing hole (201) is arranged to coincide with the optical path.

4. The aperture for an image intensifier according to claim 2, characterized in that, A rotating shaft (22) is provided at the first end of the blade monomer (21), and the blade monomer (21) is rotationally connected to the installation mechanism (1) through the rotating shaft (22); the blade assembly (2) is used to change the size of the light passing hole (201) through rotational movement under the control of the adjustment mechanism (3).

5. The aperture for an image intensifier according to claim 4, wherein, A power shaft (23) is provided at the second end of the blade monomer (21); the adjustment mechanism (3) cooperates with the power shaft (23), and the adjustment mechanism (3) is used to apply a force to the power shaft (23) to control the rotation of the blade monomer (21) relative to the installation mechanism (1).

6. The aperture for an image intensifier according to claim 5, characterized in that, The adjustment mechanism (3) includes: A turntable (31) rotationally installed inside the installation mechanism (1), a driving groove (311) being provided on the turntable (31), the driving groove (311) being arranged towards the power shaft (23), and the driving groove (311) being used to drive the power shaft (23) to move when the turntable (31) rotates relative to the installation mechanism (1), so that the blade monomer (21) rotates relative to the installation mechanism (1).

7. The aperture for an image intensifier according to claim 6, characterized in that, The number of the driving grooves (311) is multiple, the multiple driving grooves (311) are arranged along the circumferential direction of the turntable (31), the distance between adjacent driving grooves (311) is the same, and the driving grooves (311) correspond to and cooperate with the power shafts (23) on the blade monomers (21); and / or, The adjustment mechanism (3) further includes an adjustment outer ring (32) rotationally installed outside the installation mechanism (1), a pin (33) being provided on the adjustment outer ring (32), and the adjustment outer ring (32) being connected to the turntable (31) through the pin (33).

8. The aperture for an image intensifier according to claim 1, wherein, The installation mechanism (1) includes: Base (11), on the optical path, an external interface (111) is provided at the first end of the base (11), and an installation port (112) is provided at the second end of the base (11). The base (11) is installed in the low-light night vision device through the external interface (111). End cover (12), detachably connected to the base (11), and the end cover (12) is used to cover the installation port (112).

9. The aperture for an image intensifier according to claim 8, characterized in that, A first thread (1111) is provided on the outer side of the external interface (111), and a second thread (1121) is provided on the inner side of the installation port (112). The specifications of the first thread (1111) and the second thread (1121) are the same; and / or The adjusting mechanism (3) includes an adjusting outer ring (32); in the radial direction perpendicular to the optical path of the aperture, the outer diameter surface of the base (11) is lower than the outer diameter surface of the adjusting outer ring (32); and / or The adjusting mechanism (3) includes an adjusting outer ring (32); a pressure prevention distance is left between the external interface (111) and the adjusting outer ring (32) on the optical path; and / or The adjusting mechanism (3) includes a pin (33); a limiting hole (113) is provided on the base (11), and the limiting hole (113) extends along the circumferential direction of the base (11). The limiting hole (113) cooperates with the pin (33) to limit the movement range of the adjusting mechanism (3); and / or The adjusting mechanism (3) includes a turntable (31); a ring platform (115) for rotatably connecting with the blade assembly (2) is provided inside the base (11); the blade assembly (2) is located between the turntable (31) and the ring platform (115); an installation groove (114) is provided on the inner wall of the base (11), and on the optical path, the installation groove (114) is located on the side of the turntable (31) facing away from the ring platform (115); the installation mechanism (1) further includes a retaining ring (13), and the retaining ring (13) is arranged in the installation groove (114), and the retaining ring (13) is used to stop the turntable (31) on the side of the blade assembly (2) facing the external interface (111); and / or The aperture further includes a protection sheet, and the protection sheet is provided inside the base (11), and the protection sheet covers the side of the blade assembly (2) facing the installation port (112).

10. A low-light night vision device, characterized in that, It includes an image intensifier and an aperture for the image intensifier according to any one of claims 1 to 9. The aperture is arranged on the optical path of the image intensifier, and the aperture is used to adjust the light flux entering the image intensifier on the optical path.

Images