Low-radiation infrared field lens

Abstract

The low-radiation infrared field lens comprises a lens barrel and a protection assembly, the protection assembly comprises an infrared lens movably installed in the lens barrel and an anti-radiation coating coated at the front end of the infrared lens, and a rear sealing gasket is movably installed on the outer side of the rear portion of the infrared lens. A pressing ring is movably installed on the outer side of the front end of the infrared lens, and a front sealing gasket is fixedly installed in the center of the front end of the pressing ring. According to the low-radiation infrared field lens provided by the utility model, the front and rear ends of the infrared lens in the lens barrel are tightly pressed by the high-transparency film, the front sealing gasket and the rear sealing gasket through the fixing ring and the rear supporting ring, and the anti-radiation coating at the front end of the infrared lens in the lens barrel can be sealed and protected, so that the low-radiation infrared field lens is waterproof, dustproof, scratch-resistant, collision-resistant and the like in use; therefore, the problem that the anti-radiation coating at the front end of the infrared lens is damaged due to the fact that the anti-radiation coating is in a high-humidity environment, makes contact with corrosive gas or liquid and is scraped and collided, and the use of the anti-radiation coating is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared field mirrors, in particular to a low-radiation infrared field mirror. Background Art

[0002] Infrared field mirrors, also known as flat-field focusing mirrors or F-Theta mirrors, are mainly used in infrared optical systems. They are defined as lenses that work near the focal plane of the objective lens and are used to change the position of the imaging beam without changing the optical properties of the optical system. Low-radiation infrared field mirrors are specially designed optical components that are mainly used in infrared optical systems, especially those that need to reduce radiation interference or improve imaging quality. The main features of this field mirror include the ability to effectively reduce the interference of infrared radiation and improve imaging clarity and contrast. It achieves this function by coating an anti-radiation coating on the lens surface.

[0003] The existing low-radiation infrared field mirror, after being installed in the lens barrel, the anti-radiation coating applied on the front end is often exposed to the outside, and then when it is scratched by foreign objects or contaminated by corrosive gases or liquids, it is easy to cause damage to the anti-corrosion layer coating, thereby affecting its effect during use. For this reason, we propose a low-radiation infrared field mirror. Utility Model Content

[0004] The main purpose of the utility model is to provide a low-radiation infrared field mirror, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A low-radiation infrared field mirror comprises a lens barrel and a protective component, wherein the protective component comprises an infrared lens movably mounted in the lens barrel, and a radiation protection coating coated on the front end of the infrared lens, a rear sealing gasket movably mounted on the outer side of the rear portion of the infrared lens, a pressure ring movably mounted on the outer side of the front end of the infrared lens, a front sealing gasket fixedly mounted at the center of the front end of the pressure ring, a fixing ring movably mounted on the outer side of the pressure ring, and a high-transparency film movably mounted inside the fixing ring.

[0007] Preferably, the protection component further comprises a threaded groove arranged at the inner end of the fixing ring, and a pressing ring movably installed in the fixing ring at the rear side of the high-transparency film.

[0008] Preferably, the protective assembly further comprises a rear support ring fixedly disposed in the lens barrel behind the rear sealing gasket.

[0009] Preferably, the protective component further comprises a first screw opening opened on both sides of the pressure ring and the front sealing gasket, and the first screw opening passes through the front sealing gasket.

[0010] Preferably, the protective assembly further comprises second screw openings opened on both sides of the fixing ring and the pressing ring.

[0011] Preferably, the pressure ring and the fixing ring are both threadedly connected to the lens barrel.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In the utility model, the high-transparency film, the front sealing gasket and the rear sealing gasket at the front and rear ends of the infrared lens in the lens barrel are compressed by the fixing ring and the rear supporting ring, so as to seal and protect the radiation-proof coating at the front end of the infrared lens in the lens barrel, thereby achieving waterproof, dust-proof, scratch-proof and collision-proof performance during use, thereby avoiding the problem that the radiation-proof coating at the front end of the infrared lens is damaged due to being in a high humidity environment, contacting corrosive gases or liquids, scratching and collision, etc., thus affecting its use;

[0014] 2. In the present invention, when the high-transparency film in the fixing ring is scratched or aged after long-term use, the fixing ring can be removed from the lens barrel and the high-transparency film can be replaced by removing the pressing ring at its inner end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 It is a side sectional view of the utility model;

[0018] Figure 4 For this utility model Figure 3 A is an enlarged view of the middle image.

[0019] Reference numerals:

[0020] 100, lens barrel;

[0021] 200, protective component; 201, infrared lens; 202, radiation protection coating; 203, rear sealing gasket; 204, pressing ring; 205, front sealing gasket; 206, fixing ring; 207, high-transparency film; 208, threaded groove; 209, pressing ring; 210, rear support ring; 211, first screw opening; 212, second screw opening. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Embodiment 1:

[0024] like Figure 1-4 As shown, this embodiment provides a low-radiation infrared field mirror, including a lens barrel 100 and a protective component 200, the protective component 200 includes an infrared lens 201 movably installed in the lens barrel 100, and an anti-radiation coating 202 coated on the front end of the infrared lens 201, a rear sealing gasket 203 is movably installed on the outer side of the rear of the infrared lens 201, a pressing ring 204 is movably installed on the outer side of the front end of the infrared lens 201, a front sealing gasket 205 is fixedly installed at the center of the front end of the pressing ring 204, a fixing ring 206 is movably installed on the outer side of the pressing ring 204, a high-transparency film 207 is movably installed in the fixing ring 206, and the protective component 200 is also It includes a threaded groove 208 set at the inner end of the fixing ring 206, and a pressing ring 209 movably installed in the fixing ring 206 on the rear side of the high-transparency film 207. The protective component 200 also includes a rear support ring 210 fixedly set in the rear barrel 100 of the rear sealing gasket 203. The protective component 200 also includes a first screw hole 211 opened on both sides of the pressing ring 204 and the front sealing gasket 205, and the first screw hole 211 passes through the front sealing gasket 205. The protective component 200 also includes a second screw hole 212 opened on both sides of the fixing ring 206 and the pressing ring 209. The pressing ring 204 and the fixing ring 206 are both threadedly connected to the barrel 100.

[0025] Specifically, the low-radiation infrared field lens is a specially designed optical element, which is mainly used in infrared optical systems, especially for scenes that need to reduce radiation interference or improve imaging quality. The main features of this field lens include being able to effectively reduce the interference of infrared radiation and improve the clarity and contrast of imaging. It achieves this function by coating an anti-radiation coating 202 on the surface of the lens. The front and rear ends of the infrared lens 201 in the lens barrel 100 are pressed by a high-transparency film 207, a front sealing gasket 205 and a rear sealing gasket 203 through a fixing ring 206 and a rear support ring 210, which can seal and protect the anti-radiation coating 202 at the front end of the infrared lens 201 in the lens barrel 100, thereby achieving waterproof, dustproof, scratch-proof and anti-fog during use. The anti-radiation coating 202 at the front end of the infrared lens 201 can be prevented from being damaged due to being in a high humidity environment, contacting corrosive gases or liquids, being scratched, etc., which can affect its use. At the same time, after the high-transparency film 207 in the fixing ring 206 is scratched or aged after long-term use, the fixing ring 206 can also be removed from the lens barrel 100 to facilitate the replacement of the high-transparency film 207 by disassembling the pressing ring 209 at its inner end. The first screw opening 211 and the second screw opening 212 on both sides of the pressing ring 204, the fixing ring 206 and the pressing ring 209 are mainly used for the disassembly of the pressing ring 204 and the fixing ring 206 in the lens barrel 100 and the disassembly of the pressing ring 209 in the fixing ring 206.

[0026] The working principle and use process of this utility model:

[0027] When the lens barrel 100 is in use, the infrared lens 201 installed therein and the radiation protection coating 202 at the front end of the infrared lens 201 will ensure the sealing of the radiation protection coating 202 by pressing the front sealing gasket 205 and the rear sealing gasket 203 at the front and rear ends, thereby avoiding the invasion of water vapor and pollutants. The high-transparency film 207 installed in the fixing ring 206 at the front end of the radiation protection coating 202 can also prevent the radiation protection coating 202 at the front end of the infrared lens 201 from directly contacting the external corrosive gas or liquid or being scratched by foreign objects, thereby providing multiple protections for the radiation protection coating 202 at the front end of the infrared lens 201 during use, so as to avoid the problem of damage to the radiation protection coating 202 during use. At the same time, the high-transparency film 207 clamped and fixed in the fixing ring 206 can also be conveniently disassembled and replaced if damaged.

[0028] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-radiation infrared field mirror, comprising a lens barrel (100) and a protective assembly (200), characterized in that: The protection component (200) comprises an infrared lens (201) movably mounted in the lens barrel (100), and a radiation protection coating (202) coated on the front end of the infrared lens (201); a rear sealing gasket (203) is movably mounted on the outer side of the rear portion of the infrared lens (201); a pressing ring (204) is movably mounted on the outer side of the front end of the infrared lens (201); a front sealing gasket (205) is fixedly mounted at the center of the front end of the pressing ring (204); a fixing ring (206) is movably mounted on the outer side of the pressing ring (204); and a high-transparency film (207) is movably mounted in the fixing ring (206).

2. A low-radiation infrared field mirror according to claim 1, characterized in that: The protection component (200) further comprises a thread groove (208) arranged at the inner end of the fixing ring (206), and a pressing ring (209) movably installed in the fixing ring (206) at the rear side of the high-transparency film (207).

3. The low-radiation infrared field mirror according to claim 1, characterized in that: The protection assembly (200) further comprises a rear support ring (210) fixedly arranged in the rear lens barrel (100) of the rear sealing gasket (203).

4. The low-radiation infrared field mirror according to claim 1, characterized in that: The protection component (200) further comprises a first screw opening (211) opened on both sides of the pressure ring (204) and the front sealing gasket (205), and the first screw opening (211) penetrates the front sealing gasket (205).

5. The low-radiation infrared field mirror according to claim 1, characterized in that: The protection assembly (200) further comprises second screw openings (212) opened on both sides of the fixing ring (206) and the pressing ring (209).

6. The low-radiation infrared field mirror according to claim 1, characterized in that: The pressure ring (204) and the fixing ring (206) are both threadedly connected to the lens barrel (100).

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