Detachable infrared optical filtering module

Abstract

The utility model discloses a detachable infrared optical filtering module, and relates to the field of optical assemblies. The detachable infrared optical filtering module comprises a mounting ring, a threaded ring is fixedly connected to one side of the mounting ring, an infrared optical filter is arranged in the mounting ring, a circle of annular protrusion is arranged on the side, close to the threaded ring, in the mounting ring, and the detachable infrared optical filtering module further comprises a shell fixedly connected to the mounting ring at equal intervals in the circumferential direction. The mounting ring is provided with an embedding groove used in cooperation with the shell. The infrared optical filter fixing device effectively prevents the infrared optical filter from shifting and loosening when optical equipment works, ensures that the infrared optical filter is always in an accurate working position, ensures the stability and accuracy of infrared optical signal filtering, improves the quality of imaging or detection results, greatly shortens the time for maintaining and replacing the optical filter compared with a traditional fixing mode, and improves the working efficiency. The operation difficulty is reduced, flexible adjustment by a user according to different scenes is facilitated, and the overall use efficiency and adaptability of the module are improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical component technology, specifically, it relates to a detachable infrared optical filter module. Background Technology

[0002] In optical imaging, spectral analysis, security monitoring and other equipment, infrared optical filters are the core components for filtering light in specific wavelengths. Traditional filters are usually fixed in the equipment by means of adhesive, threaded rings or bolts, forming a structure that is not removable or difficult to disassemble. For example, some filter devices directly bond the filter to the mounting base by applying epoxy resin glue to the edge of the filter, or use multiple sets of screws to press it from the outside in a circumferential manner to ensure the stability of the filter in the optical path.

[0003] However, such fixing methods are susceptible to dust contamination and optical film aging after long-term use of the filter, requiring regular cleaning or replacement. However, adhesive or multi-screw fastening structures make disassembly cumbersome and may even damage the filter. Furthermore, when different application scenarios (such as day-night switching in security monitoring or band adjustment in spectrometers) require the replacement of filters with different cutoff wavelengths, traditional structures are difficult to adapt quickly and require complete replacement or time-consuming operation with the help of professional tools. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a detachable infrared optical filter module that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a detachable infrared optical filter module, including a mounting ring, a threaded ring fixedly connected to one side of the mounting ring, an infrared filter disposed inside the mounting ring, and a ring-shaped protrusion disposed on the side of the mounting ring near the threaded ring. It also includes: a housing, circumferentially and equidistantly fixedly connected to the mounting ring, with an embedding groove on the mounting ring for use with the housing; a T-shaped slide rod, slidably and sealingly connected inside the housing; triangular limiting blocks, circumferentially and equidistantly distributed on the inner side of the mounting ring, with one end of each of the T-shaped slide rods extending out of the housing and fixedly connected to an adjacent triangular limiting block; a tension spring, disposed inside the housing, with both ends fixedly connected to the housing and the T-shaped slide rods respectively; and a pneumatic component for controlling the retraction of the triangular limiting blocks into the embedding groove, mounted on the mounting ring.

[0006] Furthermore, the pneumatic assembly includes a connecting pipe and an arc-shaped airbag filled with saturated gas. The multiple housings are interconnected through the connecting pipe. The arc-shaped airbag is fixedly connected to the housing. The arc-shaped airbag is connected to the adjacent housing through an air supply pipe.

[0007] To ensure effective positioning of the infrared filter, the number of the housing and the triangular positioning blocks is at least three.

[0008] To facilitate the blocking of water vapor and dust, a sealing ring is further fixedly connected to the side of the annular protrusion near the infrared filter.

[0009] To further improve the sealing and cushioning effects, the sealing ring is an annular airbag filled with saturated gas, and a protective rubber pad is fixedly connected to the side of the triangular limiting block near the infrared filter.

[0010] To further ensure a good seal and extend the service life of the sealing ring and the protective rubber gasket, both the sealing ring and the protective rubber gasket are made of silicone rubber sheets.

[0011] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention, through the cooperation of pneumatic components and mechanical structures (T-shaped slide bar, triangular limiting block, tension spring), can apply force evenly from the circumferential direction to firmly fix the infrared filter. Combined with the annular protrusion limiting, it effectively avoids the displacement and loosening of the infrared filter when the optical equipment is working (such as when the equipment vibrates or the temperature changes cause thermal expansion and contraction), ensuring that the infrared filter is always in a precise working position, ensuring the stability and accuracy of infrared optical signal filtering, and improving the quality of imaging or detection results.

[0012] The pneumatic control method simplifies the extension and retraction of the triangular limit block, allowing for quick disassembly and installation without the need for complex tools. Compared to traditional fixing methods (such as adhesive or complex mechanical locking structures), it significantly reduces the time required for maintenance and filter replacement, lowers the operational difficulty, and allows users to flexibly adjust the module according to different scenarios (such as replacing the filter when switching detection bands or cleaning the filter due to contamination), thereby improving the overall efficiency and adaptability of the module.

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of a portion of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the shell in this utility model.

[0019] In the diagram: 1. Mounting ring; 101. Threaded ring; 102. Annular protrusion; 2. Infrared filter; 3. Sealing ring; 4. Housing; 401. T-shaped slide bar; 402. Tension spring; 403. Connecting pipe; 404. Arc-shaped airbag; 405. Air supply pipe; 5. Triangular limit block; 501. Protective rubber pad. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] Example 1:

[0022] Reference Figures 1-4 The detachable infrared optical filter module includes a mounting ring 1, with a threaded ring 101 fixedly connected to one side of the mounting ring 1. An infrared filter 2 is disposed inside the mounting ring 1. An annular protrusion 102 is disposed inside the mounting ring 1 near the threaded ring 101. The module also includes: a housing 4, which is fixedly connected to the mounting ring 1 at equal intervals around the circumference. The mounting ring 1 has an embedding groove that mates with the housing 4; a T-shaped slide rod 401, which is slidably and sealed inside the housing 4; triangular limiting blocks 5, which are distributed at equal intervals around the circumference inside the mounting ring 1. One end of each T-shaped slide rod 401 extends out of the housing 4 and is fixedly connected to an adjacent triangular limiting block 5; a tension spring 402, which is disposed inside the housing 4 and whose two ends are fixedly connected to the housing 4 and the T-shaped slide rod 401, respectively; and a pneumatic component for controlling the retraction of the triangular limiting blocks 5 into the embedding groove, which is mounted on the mounting ring 1.

[0023] The pneumatic assembly includes a connecting pipe 403 and an arc-shaped airbag 404 filled with saturated gas. Multiple housings 4 are interconnected through the connecting pipe 403. The arc-shaped airbag 404 is fixedly connected to the housing 4. The arc-shaped airbag 404 is connected to the adjacent housing 4 through an air supply pipe 405.

[0024] When assembling this module, first confirm that the mounting ring 1, infrared filter 2, housing 4, T-shaped slide bar 401, triangular limiting block 5, and other components are clean and free of debris. Check that the tension spring 402 has normal elasticity and that the pneumatic components (connecting pipe 403, arc-shaped airbag 404, air supply pipe 405) are airtight. Then, align the infrared filter 2 with the inside of the mounting ring 1 and slowly insert it. When the infrared filter 2 contacts the triangular limiting block 5, press the infrared filter 2 firmly. The triangular limiting block 5 will then overcome the elastic force of the tension spring 402 and move into the insertion groove. When the infrared filter 2 is in contact with the annular protrusion 102, the triangular limiting block 5 will reset under the action of the tension spring 402, thus completing the installation of the infrared filter 2. Finally, the operator screws the mounting ring 1 onto the end of the equipment that needs infrared filtering through the threaded ring 101.

[0025] When the infrared filter 2 needs to be replaced or cleaned as required, the staff can squeeze the arc-shaped airbag 404 to release the internal gas. At this time, the gas in the arc-shaped airbag 404 will be diverted to each housing 4 through the gas supply pipe 405 and the connecting pipe 403. After the gas enters the housing 4, it will push the T-shaped slide bar 401 to overcome the elastic force of the tension spring 402 and slide into the housing 4, causing the triangular limit block 5 to retract into the embedded groove, separating from the infrared filter 2 and releasing the clamping of the infrared filter 2. After that, the staff can easily take out the infrared filter 2 from the mounting ring 1 for replacement, cleaning or maintenance.

[0026] By combining pneumatic components with mechanical structures (T-shaped slide bar 401, triangular limiting block 5, tension spring 402), force can be applied evenly in the circumferential direction to firmly fix the infrared filter 2. Combined with the limiting of the annular protrusion 102, it effectively prevents the infrared filter 2 from shifting or loosening when the optical equipment is working (such as when the equipment vibrates or the temperature changes cause thermal expansion and contraction). This ensures that the infrared filter 2 is always in a precise working position, ensuring the stability and accuracy of infrared optical signal filtering and improving the quality of imaging or detection results.

[0027] The pneumatic control method simplifies the extension and retraction of the triangular limit block 5, allowing for quick disassembly and installation without the need for complex tools. Compared to traditional fixing methods (such as adhesive or complex mechanical locking structures), it significantly reduces the time required for maintenance and filter replacement, lowers the operational difficulty, and allows users to flexibly adjust the module according to different scenarios (such as replacing the filter when switching detection bands or cleaning the filter due to contamination), thereby improving the overall efficiency and adaptability of the module.

[0028] Example 2:

[0029] Reference Figures 1-4 The detachable infrared optical filter module is basically the same as in Example 1, but further, the number of housing 4 and triangular limiting blocks 5 is at least 3.

[0030] Multiple sets of circumferentially distributed limiting structures can form a uniform circumferential support for the infrared filter 2, effectively offsetting the thermal stress caused by changes in ambient temperature and avoiding optical deformation caused by uneven local stress. The layout of the triangular limiting blocks 5 provides higher stability. Even if a single limiting component fails, the remaining components can still maintain basic fixing functions, improving system reliability. The structural design with ≥3 blocks conforms to the three-point positioning principle in mechanical engineering, ensuring the positioning accuracy of the filter within the mounting ring 1. Combined with the synchronous drive of the pneumatic components, the filter can be quickly and accurately clamped, significantly shortening maintenance and replacement time.

[0031] Example 3:

[0032] Reference Figures 1-4 The detachable infrared optical filter module is basically the same as in Embodiment 2, but with a further improvement: a sealing ring 3 is fixedly connected to the side of the annular protrusion 102 near the infrared filter 2. In the detachable infrared optical filter module, the sealing ring 3 is fixedly connected to the side of the annular protrusion 102 near the infrared filter 2. From the perspective of optical performance assurance, the sealing ring 3 can effectively block external dust, water vapor and other pollutants from entering the module, prevent them from adhering to the surface of the infrared filter 2, prevent optical scattering and absorption abnormalities, and maintain the stable transmission and cutoff of the filter for specific infrared bands. The effect ensures the accuracy of infrared optical detection or imaging. From the perspective of structural stability, the sealing ring 3 can fill the tiny gap between the annular protrusion 102 and the filter. When the equipment is subjected to vibration and impact, it plays a buffering role, reducing the risk of damage to the filter caused by collision and friction. At the same time, it helps to enhance the positioning stability of the filter in the mounting ring 1. Together with the triangular limit block 5 and other structures, the filter is installed more firmly, reducing the possibility of optical performance fluctuations caused by displacement, extending the service life of the filter and the entire module, and improving the adaptability and reliability of the module in complex environments.

[0033] The sealing ring 3 is an annular gasbag filled with saturated gas. A protective rubber pad 501 is fixedly connected to the side of the triangular limiting block 5 closest to the infrared filter 2. In the detachable infrared optical filter module, the sealing ring 3 adopts an annular gasbag structure filled with saturated gas, combined with the protective rubber pad 501 on the triangular limiting block 5, forming an efficient buffering and auxiliary disassembly mechanism. When the triangular limiting block 5 retracts under the action of the tension spring 402, the compressed annular gasbag expands due to elastic recovery, generating a uniform thrust that pushes the infrared filter 2 out a certain distance from the inside of the mounting ring 1, allowing the filter to... The filter edge separates from the triangular limiting block 5, allowing users to easily remove the filter without tools, significantly improving replacement efficiency. At the same time, the protective rubber pad 501 works in conjunction with the annular airbag during clamping to provide flexible buffering from both sides of the filter, avoiding stress concentration or surface scratches caused by rigid contact. Especially in scenarios with frequent disassembly, it can effectively protect the optical film layers (anti-reflective film, cut-off film) of the filter and extend its service life. This double buffer design can also compensate for the slight fluctuations in the filter caused by temperature changes, ensuring that it can maintain a stable sealing and fixing effect even in extreme environments.

[0034] Both the sealing ring 3 and the protective rubber pad 501 are made of silicone rubber sheets. The high elasticity and low compression set of silicone rubber sheets can maintain the sealing effect for a long time, effectively blocking water vapor and dust, and also preventing the filter from being damaged by stress. The high tear strength reduces disassembly wear. In addition, silicone rubber has a transmittance of over 95% in the infrared band and is free from impurities.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A detachable infrared optical filter module, characterized in that, Includes a mounting ring (1), one side of which is fixedly connected to a threaded ring (101), an infrared filter (2) is disposed inside the mounting ring (1), and a ring-shaped protrusion (102) is disposed inside the mounting ring (1) near the threaded ring (101), and further includes: The housing (4) is fixedly connected to the mounting ring (1) at equal intervals around the circumference. The mounting ring (1) has an embedding groove that is used to cooperate with the housing (4). T-shaped slide bar (401) is sealed and slidably connected inside the housing (4); Triangular limiting blocks (5) are distributed equidistantly in a circle on the inner side of the mounting ring (1), and one end of each of the multiple T-shaped sliding rods (401) extending out of the housing (4) is fixedly connected to the adjacent triangular limiting blocks (5). A tension spring (402) is disposed inside the housing (4) and its two ends are fixedly connected to the housing (4) and the T-shaped slide bar (401) respectively. The pneumatic component used to control the retraction of the triangular limiting block (5) into the embedded groove is installed on the mounting ring (1).

2. The detachable infrared optical filter module according to claim 1, characterized in that, The pneumatic assembly includes a connecting pipe (403) and an arc-shaped airbag (404) filled with saturated gas. The multiple housings (4) are interconnected by the connecting pipe (403). The arc-shaped airbag (404) is fixedly connected to the housing (4). The arc-shaped airbag (404) is connected to the adjacent housing (4) by an air supply pipe (405).

3. The detachable infrared optical filter module according to claim 1, characterized in that, The number of the shell (4) and the triangular limiting block (5) is at least 3.

4. The detachable infrared optical filter module according to claim 1, characterized in that, A sealing ring (3) is fixedly connected to the side of the annular protrusion (102) near the infrared filter (2).

5. The detachable infrared optical filter module according to claim 4, characterized in that, The sealing ring (3) is an annular airbag filled with saturated gas, and the triangular limiting block (5) is fixedly connected to a protective rubber pad (501) on the side near the infrared filter (2).

6. The detachable infrared optical filter module according to claim 5, characterized in that, Both the sealing ring (3) and the protective rubber pad (501) are silicone rubber sheets.

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