Infrared temperature measuring lens for uncooled infrared detector

Abstract

The application relates to the technical field of infrared temperature measuring lenses, and discloses an infrared temperature measuring lens for a non-refrigeration infrared detector, which comprises a first lens barrel and a second lens barrel, the first lens barrel and the second lens barrel are threadedly connected, a first lens is arranged on one side in the first lens barrel, a second lens and a third lens are sequentially arranged in the second lens barrel, the infrared temperature measuring lens further comprises an adjusting assembly for adjusting the mounting positions of the second lens and the third lens; a cleaning assembly arranged in the first lens barrel, the cleaning assembly is in close contact with the inner wall of the first lens and rotates in the process of threadedly adjusting the first lens barrel and the second lens barrel. The adjusting assembly, the cleaning assembly, the air bag and the exhaust assembly are arranged, so that the stability and safety during the cleaning process are ensured, damage to the lens caused by improper cleaning is avoided, dust and impurities are prevented from entering the equipment interior, the environmental protection of the discharged gas is ensured, and the discharged dust is prevented from re-attaching to the lens surface.

Description

Technical Field

[0001] This invention relates to the field of infrared temperature measurement lens technology, specifically to an infrared temperature measurement lens for an uncooled infrared detector. Background Technology

[0002] Infrared temperature measuring lenses utilize the thermal radiation of the object being measured to create an image, enabling their use in all weather conditions. To achieve optimal temperature measurement results, existing infrared temperature measuring lenses are typically equipped with large apertures. However, in special situations (such as high temperatures), large-aperture lenses receive a high amount of energy from the target object, which can cause irreversible damage to the infrared detector connected to the lens, impacting the user experience.

[0003] Publication number "CN208805605U" discloses an infrared temperature measuring lens, which includes: multiple lenses arranged sequentially along the optical axis from the object side to the image side; and an aperture adjustment structure located on the optical path between the object side and the image side. This invention solves the problem that existing large-aperture lenses, when receiving high-energy signals from the target object, can cause irreversible damage to the infrared detector connected to the lens, thereby reducing the probability of detector damage and improving user experience.

[0004] However, the existing technology and the above-mentioned technology still have the following drawbacks: The lens spacing inside the lens barrel needs to be disassembled for adjustment, which not only causes inconvenience in use, but also makes the disassembly environment uncontrollable, which can easily cause dust to accumulate inside the lens and affect its service life. If the lens barrel seal is damaged during use, dust or mist can easily enter the lens barrel, which will have an uncontrollable impact on the acquisition efficiency and effect. Summary of the Invention

[0005] This invention provides an infrared thermometric lens for an uncooled infrared detector, which solves the problems mentioned in the background art, such as the need to disassemble and adjust the lens spacing inside the lens barrel, which not only causes inconvenience in use, but also makes the disassembly environment uncontrollable, easily causing dust to accumulate inside the lens and affecting its service life; and that if the lens barrel seal is damaged during use, dust or mist can easily enter the lens barrel, which has an uncontrollable impact on the acquisition efficiency and effect.

[0006] This invention provides the following technical solution: an infrared temperature measuring lens for an uncooled infrared detector, comprising a first lens barrel and a second lens barrel, the first lens barrel and the second lens barrel being threadedly connected, a threaded end integrally formed on one side of the first lens barrel, and an internal thread matching the threaded end being formed on the inner wall of one end of the second lens barrel, a first lens being disposed on one side of the first lens barrel, and a second lens and a third lens being disposed sequentially inside the second lens barrel, further comprising an adjustment component for adjusting the installation position of the second lens and the third lens; and a cleaning component disposed inside the first lens barrel, wherein the cleaning component rotates against the inner wall of the first lens during the threaded adjustment of the first lens barrel and the second lens barrel.

[0007] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, the adjustment assembly includes a traction block, a fixing ring is sleeved on the outside of the second lens and the third lens, the traction block is connected to one side of the outer ring of the fixing ring, an adjustment groove is opened on the side wall of the second lens barrel, an adjustment sleeve and an adjustment screw are rotatably arranged in the adjustment groove, one end of the adjustment screw is rotatably connected to the adjustment sleeve, and a bellows plate for sealing is provided in the adjustment groove.

[0008] As an optional embodiment of the infrared temperature measuring lens for an uncooled infrared detector described in this invention, wherein: one end of the adjusting sleeve is rotatably connected to an adjusting nut, one side of the adjusting nut is connected to an adjusting screw sleeve, the adjusting screw sleeve is rotatably connected inside the traction block, and the adjusting screw sleeve and the adjusting screw are threadedly connected.

[0009] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, the cleaning component includes a rotating shaft and a swing arm. A scraper is provided on the side of the swing arm near the first lens. A convex surface matching the inner wall of the first lens is opened on one side of the scraper. The swing arm and the scraper are integrally formed and both the swing arm and the scraper are set as flexible plates.

[0010] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, wherein: a gear ring is provided on the inner wall of the second lens barrel, a gear meshes in the gear ring, a fixed plate is provided on one side of the first lens barrel, the gear rotates on one side of the fixed plate, and the rotating shaft and the gear are fixedly connected.

[0011] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, wherein: a movable plate is slidably installed on one side of the inner wall of the first lens barrel, an airbag is provided between the fixed plate and the movable plate, an exhaust assembly is provided inside the first lens barrel, and the airbag and the exhaust assembly are connected.

[0012] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, wherein: one end of the airbag is connected to an exhaust pipe, the other end of the airbag is connected to an air inlet, and a one-way valve is provided in both the air inlet and the exhaust pipe.

[0013] As an optional embodiment of the infrared temperature measuring lens for an uncooled infrared detector described in this invention, wherein: a drive screw passes through the airbag, one end of the drive screw is rotatably connected to the fixed plate and extends into the gear, the drive screw and the gear are fixedly connected, and the rotating shaft and the drive screw are fixedly connected.

[0014] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, wherein: an internal threaded sleeve is rotatably installed inside the moving plate, the internal threaded sleeve is threadedly connected to the drive screw, a slider is connected to the bottom of the moving plate, and a sliding groove is provided on one side of the inner wall of the first lens barrel, the sliding groove and the slider being clearance-fitted.

[0015] As an optional solution for an infrared temperature measuring lens for an uncooled infrared detector according to the present invention, the exhaust assembly includes an exhaust jacket, an exhaust inner sleeve is provided inside the exhaust jacket, a filter plate is connected to the bottom of the exhaust inner sleeve, a cavity is provided between the filter plate and the exhaust jacket, the end of the exhaust pipe away from the airbag is connected to the cavity, and an exhaust valve is connected to the exhaust outlet of the exhaust inner sleeve.

[0016] The present invention has the following beneficial effects: 1. The infrared temperature measuring lens for an uncooled infrared detector, by setting an adjustment component, allows the lens position inside the lens to be precisely adjusted without disassembly. By rotating the adjustment screw, the traction block can be driven to move in the adjustment groove, thereby driving the fixed ring to move. The second lens and the third lens are respectively set in the two sets of fixed rings. Finally, the lens position can be adjusted without disassembly, reducing the damage to the lens caused by disassembly. 2. This uncooled infrared detector's infrared thermometric lens effectively solves the problem of difficult cleaning of the inner wall of the first lens by incorporating a cleaning component. Addressing the damage to the lens caused by repeated disassembly, the rotation of the pivot shaft drives the swing arm to oscillate. The scraper on the swing arm, due to its convex surface design matching the inner wall of the first lens, can closely adhere to it, providing a comprehensive and effective cleaning of the inner wall of the first lens as the swing arm oscillates. The integrated molding of the scraper and swing arm, along with the selection of flexible plate material, ensures stability and safety during the cleaning process, preventing damage to the lens caused by improper cleaning. 3. This uncooled infrared detector infrared temperature measurement lens, by setting an airbag, uses the rotation of the drive screw to make the inner threaded sleeve drive the moving plate to move, thereby realizing the expansion or contraction of the airbag. It can not only discharge the dust peeled off by the cleaning component from the first lens tube, but also replace the gas inside and outside the first lens tube, preventing the fogging that may be formed when the seal is damaged, and ensuring the normal use of the lens. 4. This type of infrared thermometric lens for uncooled infrared detectors ensures the cleanliness of the emitted gas through the design of an exhaust assembly, an exhaust jacket and an exhaust inner sleeve, and an internal filter plate. When the gas bladder inflates and needs to release gas, the gas enters the cavity through the exhaust pipe, is filtered by the filter plate, and then discharged to the outside of the equipment through the exhaust port and exhaust valve of the exhaust inner sleeve. This design not only prevents dust and impurities from entering the equipment, but also ensures the environmental friendliness of the emitted gas and prevents the discharged dust from re-adhering to the lens surface. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is an exploded view of the present invention.

[0019] Figure 3 This is a schematic diagram of the partial cross-sectional structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the rear partial cross-sectional structure of the present invention.

[0021] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 6 This is a cross-sectional view of the exhaust jacket structure of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the cleaning component and the exhaust component of the present invention.

[0024] Figure 8 This is a cross-sectional view of the second lens tube of the present invention.

[0025] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B.

[0026] In the diagram: 1. First lens barrel; 2. Second lens barrel; 3. First lens; 4. Second lens; 5. Third lens; 6. Threaded end; 7. Gear ring; 8. Gear; 9. Rotating shaft; 10. Swing rod; 11. Scraper; 12. Fixed plate; 13. Moving plate; 14. Slider; 15. Airbag; 16. Air inlet; 17. Exhaust pipe; 18. Exhaust outer sleeve; 19. Exhaust inner sleeve; 20. Filter plate; 21. Drive screw; 22. Internal threaded sleeve; 23. Internal thread; 24. Fixed ring; 25. Adjusting groove; 26. Traction block; 27. Adjusting sleeve; 28. Adjusting screw; 29. ​​Adjusting screw sleeve; 30. Adjusting nut; 31. Bellows plate; 32. Exhaust valve. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1, please refer to Figures 1 to 9 The present invention discloses an infrared temperature measuring lens for an uncooled infrared detector, comprising a first lens barrel 1 and a second lens barrel 2, the first lens barrel 1 and the second lens barrel 2 being threadedly connected, the first lens barrel 1 having a threaded end 6 integrally formed on one side, the second lens barrel 2 having an internal thread 23 matching the threaded end 6 on the inner wall of one end, the first lens barrel 1 having a first lens 3 disposed on one side inside, and the second lens barrel 2 having a second lens 4 and a third lens 5 disposed in sequence inside.

[0029] In this embodiment, the first lens barrel 1 and the second lens barrel 2 are tightly connected by the engagement of the threaded end 6 and the internal thread 32. This connection method is not only simple in structure but also facilitates disassembly, assembly, and adjustment, providing convenience for subsequent maintenance and replacement. The first lens 3, the second lens 4, and the third lens 5 are respectively disposed within the first lens barrel 1 and the second lens barrel 2. Through precise positioning and fixation, the accuracy and stability of the optical path are ensured. In practical applications, this design can effectively reduce light scattering and loss, improving the accuracy and reliability of infrared thermometry.

[0030] Example 2 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 9It also includes an adjustment assembly for adjusting the installation position of the second lens 4 and the third lens 5. The adjustment assembly includes a traction block 26. The second lens 4 and the third lens 5 are fitted with a fixing ring 24. The traction block 26 is connected to one side of the outer ring of the fixing ring 24. An adjustment groove 25 is opened on the side wall of the second lens barrel 2. An adjustment sleeve 27 and an adjustment screw 28 are rotatably arranged in the adjustment groove 25. One end of the adjustment screw 28 is rotatably connected to the adjustment sleeve 27. A bellows plate 31 for sealing is provided in the adjustment groove 25.

[0031] In this embodiment, the design of the adjustment assembly enables precise adjustment of the lens position. The connection between the traction block 26 and the fixing ring 24 allows the second lens 4 and the third lens 5 to move within the second lens barrel 2. The cooperation between the adjustment sleeve 27 and the adjustment screw 28 within the adjustment groove 25 enables fine-tuning of the lens position. By rotating the adjustment screw 28, the traction block 26 can be driven to move within the adjustment groove 25, thereby moving the fixing ring 24. The second lens 4 and the third lens 5 are respectively positioned within the two sets of fixing rings 24, ultimately achieving lens position adjustment without disassembly, reducing damage to the lens caused by disassembly.

[0032] It should be noted that the bellows plate 31 effectively prevents dust and impurities from entering the adjustment slot 25, ensuring the cleanliness and stable operation of the adjustment components. This design not only improves the accuracy of lens adjustment but also extends the service life of the equipment.

[0033] One end of the adjusting sleeve 27 is rotatably connected to the adjusting nut 30, and one side of the adjusting nut 30 is connected to the adjusting screw sleeve 29. The adjusting screw sleeve 29 is rotatably connected inside the traction block 26, and the adjusting screw sleeve 29 and the adjusting screw 28 are threadedly connected.

[0034] Specifically, the cooperation between the adjusting nut 30, the adjusting sleeve 29, and the adjusting screw 28 further enhances the stability and reliability of lens position adjustment. The rotation of the adjusting nut 30 drives the adjusting sleeve 29 to rotate. Due to the threaded connection between the adjusting sleeve 29 and the adjusting screw 28, the adjusting sleeve 29 can move axially along the adjusting screw 28 while rotating. This movement is transmitted to the fixing ring 24 through the traction block 26, thereby achieving precise adjustment of the positions of the second lens 4 and the third lens 5. This design is not only easy to operate but also offers high adjustment accuracy, meeting the needs of various application scenarios.

[0035] The cleaning assembly is installed inside the first lens barrel 1. During the threaded adjustment of the first lens barrel 1 and the second lens barrel 2, the cleaning assembly rotates against the inner wall of the first lens 3. The cleaning assembly includes a rotating shaft 9 and a swing arm 10. A scraper 11 is provided on the side of the swing arm 10 near the first lens 3. One side of the scraper 11 has a convex surface that matches the inner wall of the first lens 3. The swing arm 10 and the scraper 11 are integrally formed, and both the swing arm 10 and the scraper 11 are made of flexible plates.

[0036] Example 3 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 9 It also includes a cleaning component disposed inside the first lens barrel 1. The cleaning component includes a rotating shaft 9 and a swing arm 10. A scraper 11 is disposed on the side of the swing arm 10 near the first lens 3. A convex surface matching the inner wall of the first lens 3 is opened on one side of the scraper 11. The swing arm 10 and the scraper 11 are integrally formed and both the swing arm 10 and the scraper 11 are made of flexible plates.

[0037] In this embodiment, the design of the cleaning component effectively solves the problem of difficult cleaning of the inner wall of the first lens 3. Addressing the damage to the lens caused by repeated disassembly, the cleaning component is proposed. Specifically, the rotation of the rotating shaft 9 drives the swing arm 10 to swing. The scraper 11 on the swing arm 10, due to its convex surface design matching the inner wall of the first lens 3, can tightly adhere to the inner wall of the first lens 3. With the swing arm 10, the inner wall of the first lens 3 is thoroughly and effectively cleaned. The integral molding of the scraper 11 and the swing arm 10, as well as the choice of flexible plate material, ensures stability and safety during the cleaning process, avoiding damage to the lens caused by improper cleaning.

[0038] It should be noted that since gear 8 is not located at the center line of the first lens barrel 1, when the screw 9 drives the swing arm 10 and the scraper 11 to rotate, when the rotation radius is less than the length of the swing arm 10, the entire swing arm 10 and the scraper 11 are in a bent state. When bent, they fit against the inner wall of the lens barrel. As the swing arm 10 continues to rotate under the drive of the gear ring, it can return to the initial straight state. The bent state and the initial straight state change during the rotation, which ensures the cleaning effect of the scraper 11.

[0039] The inner wall of the second lens barrel 2 is provided with a gear ring 7, and a gear 8 is meshed in the gear ring 7. A fixing plate 12 is provided on one side of the first lens barrel 1. The gear 8 rotates on one side of the fixing plate 12. The rotating shaft 9 and the gear 8 are fixedly connected.

[0040] In this embodiment, the meshing design of the gear ring 7 and the gear 8 provides the power source for the rotation of the rotating shaft 9. The rotation of the gear 8 on one side of the fixed plate 12 drives the rotation of the rotating shaft 9, which is fixedly connected to it. This design is not only compact in structure but also has high transmission efficiency, ensuring the stable operation of the cleaning components. At the same time, the meshing of the gear ring 7 and the gear 8 also has a certain self-locking function, which can prevent the lens position from changing due to external forces to a certain extent, thus improving the stability and reliability of the equipment.

[0041] Example 4 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 9 A movable plate 13 is slidably installed on one side of the inner wall of the first lens barrel 1. An airbag 15 is provided between the fixed plate 12 and the movable plate 13. An exhaust assembly is provided inside the first lens barrel 1. The airbag 15 and the exhaust assembly are connected.

[0042] In this embodiment, the sliding installation design of the movable plate 13, together with the fixed plate 12 and the airbag 15, provides a linked dust removal and anti-fog mechanism for the equipment. When the gear 8 rotates, through mechanical transmission, it can not only drive the cleaning components, but also cause the airbag 15 to expand or contract accordingly, realizing the automatic discharge or intake of gas, further ensuring the stable operation of the equipment.

[0043] A drive screw 21 runs through the airbag 15. One end of the drive screw 21 is rotatably connected to the fixed plate 12 and extends into the gear 8. The drive screw 21 and the gear 8 are fixedly connected. The rotating shaft 9 is also fixedly connected to the drive screw 21. An internal threaded sleeve 22 is rotatably installed inside the moving plate 13. The internal threaded sleeve 22 is threadedly connected to the drive screw 21. A slider 14 is connected to the bottom of the moving plate 13. A groove is formed on one side of the inner wall of the first lens barrel 1. The groove and the slider 14 are in clearance fit.

[0044] In this embodiment, the design of the drive screw 21 not only extends through the airbag 15 but also achieves a rotatable connection with the fixing plate 12 and the gear 8. The gear 8 is driven by the gear ring 7, causing the drive screw 21 to rotate within the airbag 15. Since the moving plate 13 is provided with an internal threaded sleeve 22, the rotation of the drive screw 21 will cause the internal threaded sleeve 22 to move the moving plate 13, thereby realizing the expansion or contraction of the airbag 15. This not only allows the dust stripped from the cleaning components to be discharged from the first lens barrel 1 but also replaces the gas inside and outside the first lens barrel 1, preventing the formation of fogging that may occur when the seal is damaged, and ensuring the normal use of the lens.

[0045] It should be noted that the clearance fit between the slider 14 and the slide groove further enhances the stability and accuracy of the sliding plate 13 within the first lens barrel 1. The rotation of the internal threaded sleeve 22 allows the sliding plate 13 to slide smoothly along the drive screw 21 when subjected to the force of the airbag 15. The fit between the slider 14 and the slide groove provides additional guidance and support, preventing the sliding plate 13 from shifting or wobbling during the sliding process. This design not only improves the operating accuracy of the equipment but also extends its service life.

[0046] One end of the airbag 15 is connected to the exhaust pipe 17, and the other end of the airbag 15 is connected to the air inlet 16. Both the air inlet 16 and the exhaust pipe 17 are equipped with one-way valves.

[0047] In this embodiment, the arrangement of the exhaust pipe 17 and the air inlet 16, as well as the design of the internal one-way valve, ensures the gas flow direction during the expansion and contraction of the airbag 15. When the airbag 15 expands, gas is drawn in through the air inlet 16; when the airbag 15 contracts, the absorbed internal gas is discharged through the exhaust pipe 17.

[0048] It should be noted that the one-way valve effectively prevents gas backflow, ensuring the stability and effectiveness of the airbag 15's operation. This design not only improves the equipment's adaptability but also extends its service life.

[0049] Example 5 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 9 The exhaust assembly includes an exhaust jacket 18, an exhaust inner sleeve 19 is provided inside the exhaust jacket 18, a filter plate 20 is connected to the bottom of the exhaust inner sleeve 19, a cavity is provided between the filter plate 20 and the exhaust jacket 18, the end of the exhaust pipe 17 away from the airbag 15 is connected to the cavity, and an exhaust valve 32 is connected to the exhaust outlet of the exhaust inner sleeve 19.

[0050] In this embodiment, the design of the exhaust assembly effectively solves the problem of gas emission from inside the device. The design of the exhaust jacket 18 and the exhaust inner sleeve 19, as well as the setting of the internal filter plate 20, ensure the cleanliness of the emitted gas. When the airbag 15 inflates and needs to release gas, the gas enters the cavity through the exhaust pipe 17, is filtered by the filter plate 20, and then is discharged to the outside of the device through the air outlet of the exhaust inner sleeve 19 and the exhaust valve 32. This design not only prevents dust and impurities from entering the device, but also ensures the environmental friendliness of the emitted gas and avoids the dust from re-adhering to the lens surface.

[0051] Meanwhile, the exhaust valve 32 can automatically adjust the flow rate of the discharged gas according to the internal pressure of the equipment, further improving the stability and reliability of the equipment.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An infrared thermometer lens for an uncooled infrared detector, comprising a first lens barrel (1) and a second lens barrel (2), the first lens barrel (1) and the second lens barrel (2) being threadedly connected, the first lens barrel (1) having an integrally formed threaded end (6) on one side, the second lens barrel (2) having an internal thread (23) matching the threaded end (6) on the inner wall of one end, the first lens barrel (1) having a first lens (3) disposed on one side inside, and the second lens barrel (2) having a second lens (4) and a third lens (5) disposed sequentially inside, characterized in that: It also includes an adjustment assembly for adjusting the mounting positions of the second lens (4) and the third lens (5); The cleaning component is installed inside the first lens barrel (1). During the threaded adjustment of the first lens barrel (1) and the second lens barrel (2), the cleaning component rotates against the inner wall of the first lens (3).

2. The infrared thermometric lens for an uncooled infrared detector according to claim 1, characterized in that: The adjustment assembly includes a traction block (26), a fixing ring (24) is sleeved on the outside of the second lens (4) and the third lens (5), the traction block (26) is connected to one side of the outer ring of the fixing ring (24), the side wall of the second lens barrel (2) is provided with an adjustment groove (25), an adjustment sleeve (27) and an adjustment screw (28) are respectively rotatably arranged in the adjustment groove (25), one end of the adjustment screw (28) is rotatably connected in the adjustment sleeve (27), and a sealing bellows plate (31) is provided in the adjustment groove (25).

3. The infrared thermometric lens for an uncooled infrared detector according to claim 2, characterized in that: One end of the adjusting sleeve (27) is rotatably connected to an adjusting nut (30), and one side of the adjusting nut (30) is connected to an adjusting screw sleeve (29). The adjusting screw sleeve (29) is rotatably connected inside the traction block (26), and the adjusting screw sleeve (29) and the adjusting screw (28) are threadedly connected.

4. The infrared thermometric lens for an uncooled infrared detector according to claim 1, characterized in that: The cleaning assembly includes a rotating shaft (9) and a swing arm (10). A scraper (11) is provided on the side of the swing arm (10) near the first lens (3). A convex surface matching the inner wall of the first lens (3) is provided on one side of the scraper (11). The swing arm (10) and the scraper (11) are integrally formed and both the swing arm (10) and the scraper (11) are set as flexible plates.

5. The infrared thermometric lens for an uncooled infrared detector according to claim 4, characterized in that: The inner wall of the second lens barrel (2) is provided with a gear ring (7), and a gear (8) meshes in the gear ring (7). A fixing plate (12) is provided on one side of the first lens barrel (1). The gear (8) rotates on one side of the fixing plate (12). The rotating shaft (9) and the gear (8) are fixedly connected.

6. The infrared thermometric lens for an uncooled infrared detector according to claim 5, characterized in that: A movable plate (13) is slidably installed on one side of the inner wall of the first lens barrel (1). An airbag (15) is provided between the fixed plate (12) and the movable plate (13). An exhaust assembly is provided inside the first lens barrel (1). The airbag (15) and the exhaust assembly are connected.

7. An infrared thermometric lens for an uncooled infrared detector according to claim 6, characterized in that: One end of the airbag (15) is connected to an exhaust pipe (17), and the other end of the airbag (15) is connected to an air inlet (16). Both the air inlet (16) and the exhaust pipe (17) are equipped with one-way valves.

8. An infrared thermometric lens for an uncooled infrared detector according to claim 7, characterized in that: A drive screw (21) runs through the airbag (15). One end of the drive screw (21) is rotatably connected to the fixed plate (12) and extends into the gear (8). The drive screw (21) and the gear (8) are fixedly connected. The rotating shaft (9) and the drive screw (21) are fixedly connected.

9. An infrared thermometric lens for an uncooled infrared detector according to claim 8, characterized in that: An internal threaded sleeve (22) is rotatably installed inside the movable plate (13). The internal threaded sleeve (22) is threadedly connected to the drive screw (21). A slider (14) is connected to the bottom of the movable plate (13). A sliding groove is provided on one side of the inner wall of the first lens barrel (1). The sliding groove and the slider (14) are in clearance fit.

10. An infrared thermometric lens for an uncooled infrared detector according to claim 7, characterized in that: The exhaust assembly includes an exhaust jacket (18), an exhaust inner sleeve (19) is provided inside the exhaust jacket (18), a filter plate (20) is connected to the bottom of the exhaust inner sleeve (19), a cavity is provided between the filter plate (20) and the exhaust jacket (18), the exhaust pipe (17) is connected to the cavity at the end away from the airbag (15), and an exhaust valve (32) is connected to the exhaust outlet of the exhaust inner sleeve (19).

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