Infrared lens and infrared thermal imager

Abstract

This application discloses an infrared lens, including a main lens barrel, a rear lens barrel, an adjustment ring, and a detector. The rear lens barrel is rotatably connected to the outer ring of the main lens barrel; the adjustment ring is threadedly connected to the rear lens barrel to adjust its position relative to the rear lens barrel along the optical axis; the detector is connected to the rear lens barrel and abuts against the adjustment ring along the optical axis. Using this infrared lens, if problems such as image plane skewing or inversion occur during assembly, the position of the detector can be adjusted along the optical axis using the adjustment ring first. After adjustment, the angle of the detector can be adjusted by rotating the rear lens barrel. This effectively reduces the precision requirements for lens barrel manufacturing and eliminates the need to remanufacture parts, thus reducing costs. This application also discloses an infrared thermal imager.

Description

Technical Field

[0001] This application belongs to the field of infrared imaging equipment technology, specifically relating to an infrared lens and an infrared thermal imager. Background Technology

[0002] Infrared detection possesses a certain ability to penetrate smoke, fog, haze, and snow, as well as the ability to identify camouflage. It is unaffected by strong battlefield light or flashes, enabling long-range, all-weather observation, and is particularly suitable for target detection at night and under adverse weather conditions. Traditional lenses, on the other hand, require high precision in manufacturing because the positions of the lens and detector are fixed before assembly. Furthermore, if the imaging surface becomes skewed or inverted during assembly, the parts must be remanufactured, resulting in higher costs. Utility Model Content

[0003] The technical problem to be solved by this application is that traditional lens parts have high precision requirements, and the imaging surface may be skewed or inverted during assembly, requiring the parts to be remanufactured, which is costly. To solve this technical problem, an infrared lens and infrared thermal imager are provided that can adjust the position and angle of the detector and correct the imaging surface during the assembly process.

[0004] The technical solution proposed in this application is as follows:

[0005] An infrared lens, comprising:

[0006] Main tube;

[0007] The rear lens barrel is rotatably connected to the outer ring of the main lens barrel;

[0008] An adjusting ring is threadedly connected to the rear lens barrel to adjust its position relative to the rear lens barrel along the optical axis.

[0009] The detector is connected to the rear mirror tube and abuts against the adjustment ring in the optical axis direction.

[0010] Using the aforementioned infrared lens, if problems such as image plane skewing or inversion occur during assembly, the detector position can be adjusted along the optical axis using the adjusting ring. After adjustment, the detector angle can be adjusted by rotating the rear lens barrel. This effectively reduces the precision requirements for lens barrel manufacturing and eliminates the need to remanufacture parts, thus lowering costs.

[0011] Furthermore, the infrared lens also includes a retaining ring, which is connected to the rear end of the main lens barrel and abuts against the rear lens barrel.

[0012] Furthermore, the infrared lens also includes an elastic element disposed between the rear lens barrel and the retaining ring, so that the rear lens barrel fits against the main lens barrel in the optical axis direction.

[0013] Furthermore, the infrared lens also includes a handwheel, which is fixed to the outer ring of the rear lens barrel.

[0014] Furthermore, the infrared lens also includes a fixing screw, which is threaded to the rear lens barrel, and one end of the fixing screw can pass through the rear lens barrel and abut against the outer ring of the main lens barrel.

[0015] Furthermore, the infrared lens also includes a first lens and a second lens arranged sequentially along the optical axis transmission direction, both of which are disposed within the main lens barrel.

[0016] Furthermore, the infrared lens also includes a first retaining ring and a second retaining ring, both of which are disposed inside the main lens barrel. The first retaining ring is used to fix the first lens to the main lens barrel, and the second retaining ring is used to fix the second lens to the main lens barrel.

[0017] Furthermore, the infrared lens also includes a sealing ring, which is disposed between the main lens barrel and the rear lens barrel.

[0018] Furthermore, the infrared lens also includes a locking screw, which is threadedly connected to the adjusting ring, and one end of the locking screw can pass through the adjusting ring and abut against the outer ring of the rear lens barrel.

[0019] An infrared thermal imager, comprising an infrared lens as described above.

[0020] In summary, the infrared lens provided in this application has at least the following advantages:

[0021] The position of the detector can be adjusted along the optical axis by adjusting the ring, and the angle of the detector can be adjusted by rotating the rear lens barrel. This effectively reduces the requirements for processing accuracy, and there is no need to remake parts when there are problems with the imaging surface, thus reducing costs. Attached Figure Description

[0022] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the structure of an infrared lens without a detector according to an embodiment of this application;

[0024] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the infrared lens.

[0025] Label Explanation:

[0026] 11. Main lens barrel; 12. Rear lens barrel; 121. Handwheel; 13. Adjusting ring; 14. Locking screw; 151. First lens; 152. Second lens; 153. First pressure ring; 154. Second pressure ring; 161. Retaining ring; 162. Elastic element; 163. Connecting screw; 17. Fixing screw; 18. Sealing ring. Detailed Implementation

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

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] On the one hand, such as Figure 1 and Figure 2 As shown, one embodiment of this application provides an infrared lens, including a main lens barrel 11, a rear lens barrel 12, an adjustment ring 13, and a detector. The rear lens barrel 12 is rotatably connected to the outer ring of the main lens barrel 11 and is located at the rear end of the main lens barrel 11, i.e., the rear end of the main lens barrel 11 along the optical axis transmission direction; the adjustment ring 13 is threadedly connected to the rear lens barrel 12 to adjust its position relative to the rear lens barrel 12 along the optical axis direction; the detector is connected to the rear lens barrel 12 (specifically connected to...). Figure 2 (at point A in the middle), and it abuts against the adjustment ring 13 in the optical axis direction.

[0030] Using the aforementioned infrared lens, if problems such as image plane skewing or inversion occur during assembly, the position of the detector can be adjusted along the optical axis using the adjusting ring 13. After adjustment, the angle of the detector can be adjusted by rotating the rear lens barrel 12. This effectively reduces the precision requirements for lens barrel manufacturing and eliminates the need to remanufacture parts, thus reducing costs.

[0031] Regarding adjusting the detector's position along the optical axis, it's important to explain that: since the adjusting ring 13 is threadedly connected to the rear lens barrel 12 and can be adjusted relative to the rear lens barrel 12 along the optical axis, and the detector abuts against the adjusting ring 13 along the optical axis, the detector's position can be adjusted along the optical axis by rotating the adjusting ring 13. Furthermore, it should be noted that after adjusting the detector's position along the optical axis, the detector can be fixed by adhesive sealing. That is, after sealing, the detector will also be fixed relative to the rear lens barrel 12, and the rear lens barrel 12 can then be rotated to adjust the detector's angle.

[0032] Furthermore, the infrared lens also includes a locking screw 14, which is threadedly connected to the adjusting ring 13. One end of the locking screw 14 can pass through the adjusting ring 13 and abut against the outer ring of the rear lens barrel 12, thereby fixing the adjusting ring 13 relative to the rear lens barrel 12. Therefore, after adjusting the position of the detector along the optical axis, the position of the adjusting ring 13 can be fixed first by the locking screw 14, and then the detector can be fixed by adhesive sealing.

[0033] In one embodiment, the infrared lens further includes a first lens 151 and a second lens 152, which are sequentially disposed within the main lens barrel 11 along the optical axis transmission direction. Both the first lens 151 and the second lens 152 are meniscus lenses, and their convex surfaces both face the object side.

[0034] Furthermore, the infrared lens also includes a first retaining ring 153 and a second retaining ring 154. Both the first retaining ring 153 and the second retaining ring 154 are disposed inside the main lens barrel 11. The first retaining ring 153 is used to fix the first lens 151 to the main lens barrel 11, and the second retaining ring 154 is used to fix the second lens 152 to the main lens barrel 11.

[0035] In one embodiment, the detector includes a protective window and an image plane arranged sequentially along the optical axis transmission direction. The light beam passes sequentially through a first lens 151, a second lens 152, and the protective window, and then forms an image on the image plane.

[0036] In one embodiment, the infrared lens further includes a retaining ring 161, which is connected to the rear end of the main lens barrel 11 and abuts against the rear lens barrel 12 to limit the rear lens barrel 12 onto the main lens barrel 11 in the optical axis direction. Further, the infrared lens also includes an elastic element 162, which is disposed between the rear lens barrel 12 and the retaining ring 161 to allow the rear lens barrel 12 to conform to the main lens barrel 11 in the optical axis direction (i.e.,...). Figure 2 The middle main lens barrel 11 and the rear lens barrel 12 are fitted together at point B to prevent the rear lens barrel 12 from shifting in the optical axis direction during rotation. Optionally, the elastic element 162 is a wave spring. Of course, in other embodiments, a retaining ring 161 with elasticity can also be used to limit and fix the rear lens barrel 12.

[0037] In practical applications, the infrared lens also includes a connecting screw 163, which is connected between the retaining ring 161 and the main lens barrel 11 to fix the retaining ring 161 to the main lens barrel 11.

[0038] In one embodiment, the infrared lens further includes a fixing screw 17, which is threaded to the rear lens barrel 12. One end of the fixing screw 17 can pass through the rear lens barrel 12 and abut against the outer ring of the main lens barrel 11 to fix the rear lens barrel 12 relative to the main lens barrel 11. Similarly, after rotating the rear lens barrel 12 and adjusting the angle of the detector, the rear lens barrel 12 can be fixed relative to the main lens barrel 11 by the fixing screw 17.

[0039] In one embodiment, the infrared lens further includes a handwheel 121, which is fixed to the outer ring of the rear lens barrel 12 to facilitate the rotation of the rear lens barrel 12.

[0040] In one embodiment, the infrared lens further includes a sealing ring 18, which is disposed between the main lens barrel 11 and the rear lens barrel 12, specifically between the outer ring of the main lens barrel 11 and the inner ring of the rear lens barrel 12, to ensure the sealing of the connection between the main lens barrel 11 and the rear lens barrel 12 and to prevent external impurities from entering and affecting the imaging.

[0041] In summary, the infrared lens provided in this application has at least the following advantages:

[0042] The position of the detector can be adjusted along the optical axis by adjusting the ring 13, and the angle of the detector can be adjusted by rotating the rear lens barrel 12. This effectively reduces the requirements for processing accuracy, and there is no need to remake parts when there are problems with the imaging surface, thus reducing costs.

Claims

1. An infrared lens, characterized in that, include: Main tube; The rear lens barrel is rotatably connected to the outer ring of the main lens barrel; An adjusting ring is threadedly connected to the rear lens barrel to adjust its position relative to the rear lens barrel along the optical axis. The detector is connected to the rear mirror tube and abuts against the adjustment ring in the optical axis direction.

2. The infrared lens according to claim 1, characterized in that, It also includes a retaining ring, which is connected to the rear end of the main lens barrel and abuts against the rear lens barrel.

3. The infrared lens according to claim 2, characterized in that, It also includes an elastic element disposed between the rear lens barrel and the retaining ring, so that the rear lens barrel fits against the main lens barrel in the optical axis direction.

4. The infrared lens according to claim 1, characterized in that, It also includes a handwheel, which is fixed to the outer ring of the rear lens barrel.

5. The infrared lens according to claim 1, characterized in that, It also includes a fixing screw, which is threaded to the rear lens barrel, and one end of the fixing screw can pass through the rear lens barrel and abut against the outer ring of the main lens barrel.

6. The infrared lens according to claim 1, characterized in that, It also includes a first lens and a second lens arranged sequentially along the optical axis transmission direction, both of which are disposed inside the main lens barrel.

7. The infrared lens according to claim 6, characterized in that, It also includes a first pressure ring and a second pressure ring, both of which are disposed inside the main lens barrel. The first pressure ring is used to fix the first lens to the main lens barrel, and the second pressure ring is used to fix the second lens to the main lens barrel.

8. The infrared lens according to claim 1, characterized in that, It also includes a sealing ring, which is disposed between the main lens barrel and the rear lens barrel.

9. The infrared lens according to claim 1, characterized in that, It also includes a locking screw, which is threadedly connected to the adjusting ring, and one end of the locking screw can pass through the adjusting ring and abut against the outer ring of the rear lens barrel.

10. An infrared thermal imager, characterized in that, Including the infrared lens as described in any one of claims 1-9.

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