An infrared thermal imager capable of quickly changing lenses and filters

Abstract

The utility model discloses an infrared thermal imager of quick replacement lens and optical filter, including casing and external lens subassembly. External lens subassembly is fixed through screw thread connection in the outside of casing, contains lens fixing piece, infrared lens, lens fixed ring, optical protection window and lens decoration ring. Infrared lens is fixed in lens fixing piece through screw thread, and the front end is equipped with detachable optical protection window (optical filter or germanium window), and is locked and fixed by lens decoration ring. Lens fixed ring and waterproof seal ring constitute double waterproof structure, ensure IP67 protection level. The device passes through modularization screw thread connection design, makes the user can replace different specifications infrared lens and optical protection window, adapts multiband observation demand. Its advantages include: simple operation, strong leakproofness, high environmental adaptability, especially suitable for the scene of flexible adjustment equipment such as fire control, industrial detection etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of infrared thermal imaging devices, and in particular relates to an infrared thermal imager that can quickly change lenses and filters. Background Technology

[0002] Infrared thermal imagers utilize infrared thermal imaging technology to assist firefighters in reconnaissance, search and rescue, and firefighting operations at disaster sites. Whether it's a fire or a rescue operation, thermal imagers provide firefighters with a field of vision beyond the naked eye, making them an indispensable tool for professional firefighters. Firefighters' proficiency in using infrared thermal imagers can improve firefighting and rescue efficiency, anticipate risks and hazards, and ensure safe and efficient firefighting and rescue operations.

[0003] Currently, most handheld infrared thermal imagers on the market have their infrared lenses fixed inside the housing, making it impossible for users to replace them themselves. Furthermore, users cannot add or remove protective windows (such as germanium windows or filters). The lens parameters are fixed at the factory and cannot be changed. Utility Model Content

[0004] The purpose of this invention is to provide an infrared thermal imager that can quickly change lenses and filters, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the specific technical solution of this utility model for an infrared thermal imager capable of quickly changing lenses and filters is as follows: An infrared thermal imager with quick-change lenses and filters includes a housing and an external lens assembly. The external lens assembly is fixed to the outside of the device body by threads. The external lens assembly includes a lens holder, an infrared lens, a lens retaining ring, an optical protection window, and a lens decorative ring. The lens holder is fixedly installed inside the housing, the infrared lens is fixed inside the lens holder, the lens retaining ring is fixed to the end face of the lens holder, and the optical protection window is installed at the front end of the infrared lens and fixed by the lens decorative ring.

[0006] Furthermore, the outer wall of the infrared lens has external threads, and the inner side of the lens fixing ring has internal threads. The infrared lens is fixed in the lens fixing component by threaded connection.

[0007] Furthermore, the outer side of the end face of the lens fixing component has external threads, and the lens fixing ring is fixed to the end face of the lens fixing component through a threaded connection, further fixing the infrared lens.

[0008] Furthermore, a retaining ring is installed at the front end of the infrared lens, with space provided, and the optical protection window is installed on the retaining ring of the infrared lens.

[0009] Furthermore, the inner side of the lens decorative ring has an internal thread, and the outer side of the infrared lens end face has an external thread. The lens decorative ring is fixed to the infrared lens end face by a threaded connection.

[0010] Furthermore, the external lens assembly also includes a waterproof structure, which includes a waterproof sealing ring one and a waterproof sealing ring two. The outer circumference of the lens fixing component has a sealing groove one, and the waterproof sealing ring one is fixed in the sealing groove. The end face of the lens fixing ring is tightly attached to the waterproof sealing ring one. The outer circumference of the infrared lens has a sealing groove two, and the waterproof sealing ring two is fixed in the sealing groove two and tightly attached to the inner wall of the lens fixing component.

[0011] Furthermore, the optical protection window is a filter or a germanium window. This invention provides an infrared thermal imager capable of quickly changing lenses and filters, which has the following advantages: the infrared thermal imager can quickly change infrared lenses for observation according to different environmental needs, and can also add protective windows (such as filters, germanium windows, and other optical lenses) to change the infrared band, facilitating firefighters in fire rescue operations.

[0012] The infrared thermal imager of this invention, which allows for quick lens and filter replacement, has the following advantages: Quick lens and filter replacement: With its external lens threaded connection design, users can easily disassemble and replace infrared lenses and optical protection windows (such as filters, germanium windows, etc.) without the need for professional tools or complicated operations, significantly improving the flexibility and adaptability of the equipment.

[0013] Enhanced environmental adaptability: Lenses and filters can be freely matched according to different observation needs (such as different infrared bands or protection requirements), making it suitable for various scenarios such as fire protection and industrial inspection, thus expanding the functional range of the equipment.

[0014] High sealing and waterproof performance: The double waterproof sealing ring design (sealing groove one and sealing groove two) ensures that the lens assembly reaches the IP67 protection level after installation, effectively preventing moisture and dust from entering the interior and ensuring the reliability of the equipment in harsh environments.

[0015] The structure is robust and easy to maintain: the threaded locking mechanism of the lens retaining ring and decorative ring ensures the secure fixation of the optical components and simplifies the disassembly and assembly process, making it easy for users to clean or replace parts and reducing maintenance costs.

[0016] High compatibility and versatility: The optical protection window supports various lenses such as filters and germanium windows, allowing users to flexibly choose according to their actual needs to meet different infrared imaging bands or protection requirements, thereby enhancing the practical value of the equipment.

[0017] In summary, this utility model has significantly improved in terms of convenience, functionality, and environmental adaptability, and is especially suitable for fields such as fire rescue that require rapid response and multi-scenario application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the infrared thermal imager of this utility model; Figure 2 This is an exploded view of the external lens assembly of the infrared thermal imager of this utility model. Figure 3 This is a schematic diagram of the cross-sectional structure of the infrared thermal imager of this utility model; The markings in the diagram are as follows: 1. Housing; 2. External lens assembly; 21. Lens mounting bracket; 22. Infrared lens; 221. Pressure ring; 23. Waterproof structure; 231. Waterproof sealing ring one; 232. Waterproof sealing ring two; 24. Lens fixing ring; 25. Optical protection window; 26. Lens decorative ring. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of an infrared thermal imager capable of quickly changing lenses and filters.

[0020] like Figure 1-3 As shown, this utility model discloses an infrared thermal imager that can quickly change lenses and filters, including a housing 1 and an external lens assembly 2. The external lens assembly 2 is fixed to the outside of the device body 1 by threads and can be disassembled and installed by the user.

[0021] The external lens assembly 2 includes a lens mount 21, an infrared lens 22, a waterproof structure 23, a lens retaining ring 24, an optical protection window 25, and a lens decorative ring 26. The lens mount 21 is fixedly installed inside the housing 1 and has a cavity to accommodate the infrared lens 22. The inner wall of the cavity has internal threads, the outer wall of the infrared lens 22 has external threads, and the inner side of the lens retaining ring 24 has internal threads. The infrared lens 22 is fixed to the lens mount 21 by a threaded connection. The outer side of the end face of the lens mount 21 has external threads, and the lens retaining ring 24 is fixed to the end face of the lens mount 21 by a threaded connection, further securing the infrared lens 22. A pressure ring 221 is installed at the front end of the infrared lens 22, with space provided. The optical protection window 25 can be installed on the pressure ring 221 of the infrared lens 22 and fixed by the lens decorative ring 26. The inner side of the lens decorative ring 26 has internal threads, and the outer side of the end face of the infrared lens 22 has external threads. The lens decorative ring 26 is fixed to the end face of the infrared lens 22 by a threaded connection. The waterproof structure 23 includes a first waterproof sealing ring 231 and a second waterproof sealing ring 232. The lens mounting member 21 has a first sealing groove 211 on its outer circumference, and the first waterproof sealing ring 231 is fixed within the sealing groove 211. The end face of the lens mounting ring 24 is tightly fitted against the first waterproof sealing ring 231. The infrared lens 22 has a second sealing groove 222 on its outer circumference, and the second waterproof sealing ring 232 is fixed within the second sealing groove 222, tightly fitting against the inner wall of the lens mounting member 21. The waterproof structure 23 provides a double sealing effect, ensuring an IP67 protection rating after installation and preventing water from entering the lens.

[0022] The optical protection window is made of optical lenses such as filters and germanium windows, which can change the infrared band to facilitate use in different environments.

[0023] Installation steps: Step 1: First, install the waterproof sealing ring 231 into the sealing groove of the lens mounting bracket 21, and then install the waterproof sealing ring 232 into the sealing groove of the infrared lens 22. Step 2: Screw the infrared lens 22 into the lens holder 21, and then adjust the focus according to the image.

[0024] Step 3: Tighten the lens retaining ring 24 onto the threaded end of the lens retainer 21 to ensure a waterproof seal.

[0025] Step 4: Place the optical protection window 25 in front of the infrared lens 22, and then tighten it with the lens decorative ring 26.

[0026] Step 5: To replace the optical protective window 25 and the infrared lens 22, first rotate and remove the lens decorative ring 26, then remove the optical protective window 25. Rotate and remove the lens retaining ring 24 to remove the infrared lens 22.

[0027] Step 6: Repeat steps 1-4 to install the required replacement infrared lens 22 and optical protection window 25 onto the equipment.

[0028] This infrared thermal imager can quickly change infrared lenses to meet different environmental requirements, and can also add a protective window to change the infrared band, making it easier for firefighters to carry out fire rescue operations.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. An infrared thermal imager capable of quickly changing lenses and filters, comprising a housing (1) and an external lens assembly (2), characterized in that, The external lens assembly (2) is fixed to the outside of the device body by threads. The external lens assembly (2) includes a lens fixing member (21), an infrared lens (22), a lens fixing ring (24), an optical protection window (25), and a lens decorative ring (26). The lens fixing member (21) is fixedly installed inside the housing (1). The infrared lens (22) is fixed inside the lens fixing member (21). The lens fixing ring (24) is fixed to the end face of the lens fixing member (21). The optical protection window (25) is installed on the front end of the infrared lens (22) and fixed by the lens decorative ring (26). The lens assembly (2) also includes a waterproof structure (23), which includes a waterproof sealing ring one (231) and a waterproof sealing ring two (232). The lens fixing member (21) has a sealing groove one (211) on its outer circumference. The waterproof sealing ring one (231) is fixed in the sealing groove one (211), and the end face of the lens fixing ring (24) is in close contact with the waterproof sealing ring one (231). The infrared lens (22) has a sealing groove two (222) on its outer circumference. The waterproof sealing ring two (232) is fixed in the sealing groove two (222) and is in close contact with the inner wall of the lens fixing member (21).

2. The infrared thermal imager capable of quickly changing lenses and filters according to claim 1, characterized in that, The infrared lens (22) has an external thread on its outer wall and an internal thread on the inner side of the lens fixing ring (24). The infrared lens (22) is fixed in the lens fixing member (21) by the threaded connection.

3. The infrared thermal imager capable of quickly changing lenses and filters according to claim 1, characterized in that, The lens fixing member (21) has an external thread on the outer side of its end face, and the lens fixing ring (24) is fixed to the end face of the lens fixing member (21) by the threaded connection, further fixing the infrared lens (22).

4. The infrared thermal imager capable of quickly changing lenses and filters according to claim 1, characterized in that, The infrared lens (22) has a retaining ring (221) installed at the front end, with space left, and the optical protection window (25) is installed on the retaining ring (221) of the infrared lens (22).

5. The infrared thermal imager capable of quickly changing lenses and filters according to claim 1, characterized in that, The lens decorative ring (26) has an internal thread on its inner side and an external thread on the outer side of the end face of the infrared lens (22). The lens decorative ring (26) is fixed to the end face of the infrared lens (22) by a threaded connection.

6. The infrared thermal imager capable of quickly changing lenses and filters according to claim 1, characterized in that, The optical protection window is a filter or a germanium window.

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