A long-wave infrared lens

Abstract

The utility model discloses a long-wave infrared lens, and relates to the technical field of long-wave infrared. The utility model comprises a lens body, wherein a protective component is installed at the front of the lens body, and the protective component comprises a connecting tube, wherein a limiting groove is arranged inside the connecting tube, a telescopic ring is movably installed through the front of the connecting tube, a protective mirror is fixedly installed at the front of the telescopic ring, a plurality of guide rods are installed inside the limiting groove and through the rear of the telescopic ring, a spring is sleeved on the periphery of the guide rod, the rear end of the telescopic ring is located in the limiting groove and is slidably arranged, the thickness between the inner and outer circles of the rear end of the telescopic ring is greater than the thickness between the inner and outer circles of the front end, the guide rod is fixed to the connecting tube, and the guide rod is inserted into the interior of the telescopic ring and is slidably arranged; the entry of external dust is reduced, the protection and buffering of the lens body are improved, and the disassembly and cleaning of the protective mirror are convenient, and the self-rotation falling off of the connecting tube is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of long-wave infrared technology, and particularly relates to a long-wave infrared lens. Background Art

[0002] A long-wave infrared lens is an imaging device that can capture long-wave infrared radiation. It mainly works by detecting the thermal radiation emitted by an object. This lens can capture the thermal radiation of an object in a completely dark environment. This solution specifically involves a long-wave infrared lens;

[0003] When the existing long-wave infrared lens is in use, external dust easily enters and adheres to the lens surface, and wiping and cleaning easily cause wear, which is not convenient for providing buffering and protection. When performing overall cleaning, it is not convenient to disassemble and clean the protective glasses. Utility Model Content

[0004] The main purpose of the utility model is to provide a long-wave infrared lens, which can effectively solve the technical problems in the background technology.

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

[0006] A long-wave infrared lens comprises a lens body, a protective assembly is installed at the front of the lens body, the protective assembly comprises a connecting tube, a limiting groove is arranged inside the connecting tube, a telescopic ring is movably installed through the front of the connecting tube, a protective mirror is fixedly installed at the front of the telescopic ring, a plurality of guide rods are installed inside the limiting groove and through the rear of the telescopic ring, and springs are sleeved on the periphery of the guide rods.

[0007] As a further solution of the utility model, the rear end of the telescopic ring is slidably arranged in the limiting groove, and the thickness between the inner and outer rings at the rear end of the telescopic ring is greater than the thickness between the inner and outer rings at the front end.

[0008] As a further solution of the utility model, the guide rod and the connecting tube are fixed to each other, and the guide rod penetrates the interior of the telescopic ring and is slidably arranged.

[0009] As a further solution of the utility model, a fixing component is installed between the rear end of the connecting tube and the outer periphery of the lens body near the front end, and the fixing component includes a knob, and the knob is movably installed on the outer periphery of the lens body near the front end, and a retaining ring is installed on the outer periphery of the lens body near the front end and located on the inner circle of the knob, and four positioning grooves are provided at the front of the retaining ring, a connecting sleeve is fixedly installed at the front of the knob, a screw groove is provided on the outer wall of the connecting tube, and four positioning blocks are fixedly installed at the rear of the connecting tube.

[0010] As a further solution of the utility model, the knob is located on the periphery of the lens body and is movably rotatable, and the outer diameter of the retaining ring is greater than the inner diameter of the knob.

[0011] As a further solution of the utility model, the positioning block and the positioning groove are arranged in a snap connection, and the screw grooves on the inner wall of the connecting sleeve are arranged in a threaded connection.

[0012] The beneficial effects of the utility model are as follows:

[0013] By setting a protective component, the protective mirror is located in the front part of the lens body, and the protective mirror improves the protection of the lens inside the lens body, reduces the entry of external dust, facilitates wiping and cleaning, reduces the wear of the lens in the lens body, and improves the buffering of the lens body through the expansion and contraction of the expansion ring;

[0014] By setting a fixing component, the positioning block is inserted into the positioning groove, and the connection between the connecting sleeve and the outer screw groove of the connecting tube is convenient for disassembly and cleaning of the connecting tube and the protective mirror. The positioning block is clamped with the positioning groove to prevent the connecting tube from rotating and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a long-wave infrared lens of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a protective component in a long-wave infrared lens of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of a fixed component in a long-wave infrared lens of the utility model;

[0018] Figure 4 The utility model is an internal side view of a long-wave infrared lens.

[0019] In the figure: 1. lens body; 2. protective assembly; 3. fixing assembly; 4. connecting tube; 5. limiting groove; 6. telescopic ring; 7. protective mirror; 8. guide rod; 9. spring; 10. knob; 11. retaining ring; 12. connecting sleeve; 13. positioning groove; 14. screw groove; 15. positioning block. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-4As shown, a long-wave infrared lens comprises a lens body 1, a protective assembly 2 is installed at the front of the lens body 1, the protective assembly 2 comprises a connecting tube 4, a limiting groove 5 is arranged inside the connecting tube 4, a telescopic ring 6 is movably installed through the front of the connecting tube 4, a protective mirror 7 is fixedly installed at the front of the telescopic ring 6, a plurality of guide rods 8 are installed inside the limiting groove 5 and through the rear of the telescopic ring 6, and a spring 9 is sleeved on the outer periphery of the guide rod 8.

[0022] In this embodiment, the rear end of the telescopic ring 6 is located in the limiting groove 5 and is slidably arranged. The thickness between the inner and outer circles at the rear end of the telescopic ring 6 is greater than the thickness between the inner and outer circles at the front end. The telescopic ring 6 is used to support the protective mirror 7 and provide buffering through the telescopic movement of the telescopic ring 6.

[0023] In this embodiment, the guide rod 8 and the connecting tube 4 are fixed to each other, and the guide rod 8 passes through the interior of the telescopic ring 6 and is slidably arranged. Under the action of the spring 9, the telescopic ring 6 drives the protective mirror 7 to telescope and slide, thereby reducing the contact between external dust and the lens in the lens body 1 through the protective mirror 7.

[0024] In this embodiment, a fixing assembly 3 is installed between the rear end of the connecting tube 4 and the outer periphery of the lens body 1 near the front end, and the fixing assembly 3 includes a knob 10, which is movably installed on the outer periphery of the lens body 1 near the front end, and a retaining ring 11 is installed on the outer periphery of the lens body 1 near the front end and located on the inner circle of the knob 10, and four positioning grooves 13 are provided in the front part of the retaining ring 11, and a connecting sleeve 12 is fixedly installed at the front part of the knob 10, and a screw groove 14 is provided on the outer wall of the connecting tube 4, and four positioning blocks 15 are fixedly installed at the rear part of the connecting tube 4, and the connection between the screw groove 14 on the outer periphery of the connecting tube 4 and the connecting sleeve 12 facilitates the disassembly and cleaning of the protective mirror 7.

[0025] In this embodiment, the knob 10 is located on the periphery of the lens body 1 and is movably rotatable. The outer diameter of the retaining ring 11 is larger than the inner diameter of the knob 10. The connecting sleeve 12 is connected to the connecting tube 4 by rotating the knob 10 to be fixed.

[0026] In this embodiment, the positioning block 15 is snap-connected with the positioning groove 13, and the inner wall screw groove 14 of the connecting sleeve 12 is threadedly connected. The positioning block 15 is snapped into the positioning groove 13 to prevent the connecting tube 4 from self-rotating and disengaging, so that the connecting sleeve 12 is connected to the connecting tube 4.

[0027] It should be noted that the utility model is a long-wave infrared lens. When in use, the connecting tube 4 is connected and installed on the front part of the lens body 1. The long-wave infrared in the lens body 1 is transmitted through the protective mirror 7. When protection is performed, the lens in the lens body 1 is protected by the protective mirror 7 to reduce the entry of external dust. When an external object contacts and collides with the protective mirror 7, the telescopic ring 6 shrinks into the connecting tube 4 to provide a buffer. When it is disassembled and cleaned and installed again, the positioning block 15 at the rear of the connecting tube 4 is inserted into the positioning groove 13. The connecting sleeve 12 is connected to the screw groove 14 on the outer periphery of the connecting tube 4 by rotating the knob 10 for fixing. The positioning block 15 is engaged with the positioning groove 13 to prevent the connecting tube 4 from rotating and falling off.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A long-wave infrared lens, comprising a lens body (1), a protective component (2) being installed at the front of the lens body (1), characterized in that: The protection component (2) comprises a connecting tube (4), a limiting groove (5) is provided inside the connecting tube (4), a telescopic ring (6) is movably installed through the front of the connecting tube (4), a protective mirror (7) is fixedly installed on the front of the telescopic ring (6), a plurality of guide rods (8) are installed inside the limiting groove (5) and through the rear of the telescopic ring (6), and a spring (9) is sleeved on the outer periphery of the guide rods (8).

2. A long-wave infrared lens according to claim 1, characterized in that: The rear end of the telescopic ring (6) is located in the limiting groove (5) and is slidably arranged. The thickness between the inner and outer rings at the rear end of the telescopic ring (6) is greater than the thickness between the inner and outer rings at the front end.

3. The long-wave infrared lens according to claim 1, characterized in that: The guide rod (8) and the connecting tube (4) are fixed to each other, and the guide rod (8) penetrates the interior of the telescopic ring (6) and is slidably arranged.

4. The long-wave infrared lens according to claim 1, characterized in that: A fixing assembly (3) is installed between the rear end of the connecting tube (4) and the outer periphery of the lens body (1) near the front end. The fixing assembly (3) comprises a knob (10). The knob (10) is movably installed at the outer periphery of the lens body (1) near the front end. A retaining ring (11) is installed at the outer periphery of the lens body (1) near the front end and located at the inner circle of the knob (10). Four positioning grooves (13) are provided at the front of the retaining ring (11). A connecting sleeve (12) is fixedly installed at the front of the knob (10). A screw groove (14) is provided on the outer wall of the connecting tube (4). Four positioning blocks (15) are fixedly installed at the rear of the connecting tube (4).

5. The long-wave infrared lens according to claim 4, characterized in that: The knob (10) is located on the periphery of the lens body (1) and is movably rotatable, and the outer diameter of the retaining ring (11) is greater than the inner diameter of the knob (10).

6. The long-wave infrared lens according to claim 4, characterized in that: The positioning block (15) and the positioning groove (13) are arranged in a clamping connection, and the inner wall screw groove (14) of the connecting sleeve (12) is arranged in a threaded connection.

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