Infrared detector

Abstract

The utility model discloses an infrared detector, comprising a housing in which an installation channel is arranged; the rear end of the infrared lens is arranged in the mounting channel; the first limiting assembly is arranged in the mounting channel, and the first limiting assembly comprises a first limiting part; the lens adapter is arranged in the mounting channel, a second limiting part is arranged on the lens adapter, and the first limiting part and the second limiting part are matched to limit the outward moving stroke of the infrared lens; the detector connecting assembly is arranged in the mounting channel, a third limiting part is arranged on the detector connecting assembly, and the third limiting part is matched with the second limiting part to limit the inward moving stroke of the infrared lens; and at least one part of the detector is positioned in the mounting channel and is fixedly connected with the detector connecting assembly. According to the utility model, focusing of the infrared lens is completed with a relatively simple structure, and the technical effects of satisfying the focusing requirement and remarkably reducing the use cost are achieved.

Description

Technical Field

[0001] This utility model relates to the field of detector technology, and more specifically, to an infrared detector. Background Technology

[0002] Currently, infrared detectors require infrared lenses for operation. Focusing lenses in detectors are mainly divided into focusing lenses and fixed-focus lenses, with focusing lenses further divided into motorized and manual focusing. Lens selection is crucial for the equipment, requiring consideration of parameters such as the shooting scene, distance, and field of view. Most lenses on the market are ready-made; custom-made lenses, especially infrared lenses, have long design, production, and debugging cycles, resulting in high costs. Motorized focusing lenses generally use motor drives, have complex structures, are large in size, and require software and hardware adjustments and adaptations for the motor, making them impractical for scenarios where focusing is infrequent. For fixed-focus lenses with suitable optical parameters, a focusing mechanism needs to be added if focusing is required. Utility Model Content

[0003] The main objective of this invention is to provide an infrared detector to solve the problems of complex focusing structures and high operating costs associated with infrared lenses in related technologies.

[0004] To achieve the above objectives, this utility model provides an infrared detector, comprising:

[0005] A housing, wherein an installation channel is provided inside the housing;

[0006] An infrared lens, the rear end of which is located within the mounting channel;

[0007] A first limiting component is disposed within the installation channel, and the first limiting component includes a first limiting part;

[0008] A lens adapter is disposed within the mounting channel and fixed to the rear end of the infrared lens. The lens adapter is provided with a second limiting part corresponding to the first limiting part. The first limiting part and the second limiting part cooperate to limit the outward movement of the infrared lens.

[0009] A detector connection assembly is disposed within the mounting channel and is threadedly connected to the lens adapter. The detector connection assembly is provided with a third limiting part, which cooperates with the second limiting part to limit the inward movement of the infrared lens.

[0010] A detector, at least a portion of which is located within the mounting channel and is fixedly connected to the detector connection assembly.

[0011] Furthermore, the thread length on the lens adapter is greater than the distance between the second limiting part and the third limiting part.

[0012] Furthermore, the first limiting component includes a lens support, a sealing ring, and a sealing ring bracket, wherein the lens support, the sealing ring, and the sealing ring bracket are sequentially fitted onto the rear end of the infrared lens and fit tightly together.

[0013] The first limiting part is the rear end face of the sealing ring bracket.

[0014] Furthermore, the sealing ring is made of silicone sheet, and the front and rear faces of the silicone sheet are respectively bonded and attached to the lens support and the sealing ring bracket.

[0015] Furthermore, the lens support is provided with a positioning post, and the sealing ring bracket is provided with a positioning hole, and the positioning post is inserted into the positioning hole.

[0016] Furthermore, a first positioning flange is provided at the front end of the installation channel, and a second positioning flange is provided on the lens support to be positioned and fitted with the first positioning flange.

[0017] Furthermore, the lens adapter is sleeved and fixed to the rear end of the infrared lens, and the lens adapter has a lip on its circumferential side to form the second limiting part.

[0018] Furthermore, the lens adapter has an internal thread on its inner side, and is connected to the rear thread of the infrared lens through the internal thread.

[0019] The infrared lens has a plurality of first connection holes on its rear end sidewall, and the lens adapter has a plurality of second connection holes on its sidewall. The plurality of first connection holes are evenly distributed around the rear end thread of the infrared lens, and the plurality of second connection holes are evenly distributed around the circumference of the lens adapter.

[0020] At least one of the plurality of first connecting holes is used to connect with at least one of the plurality of second connecting holes by screws.

[0021] Furthermore, the detector connection assembly includes a lens flange, which is fitted and fixedly connected to the front end face of the detector, and a portion of the lens adapter is threadedly connected to the inner side of the lens flange.

[0022] The third limiting part is the front end face of the lens flange.

[0023] Furthermore, the detector connection assembly also includes a heat insulation plate, which is disposed between the lens flange and the front end face of the detector.

[0024] In this embodiment of the invention, a housing is provided, and an installation channel is provided inside the housing; an infrared lens, the rear end of which is located within the installation channel; a first limiting component, located within the installation channel, comprising a first limiting part; a lens adapter, located within the installation channel and fixed to the rear end of the infrared lens, the lens adapter having a second limiting part corresponding to the first limiting part, the first limiting part and the second limiting part cooperating to limit the outward movement of the infrared lens; and a detector connecting component, located within the installation channel, the detector connecting component being threadedly connected to the lens adapter, the detector connecting component having a third limiting part. The limiting part cooperates with the second limiting part to limit the inward movement of the infrared lens; the detector, at least a part of which is located in the mounting channel and fixedly connected to the detector connecting assembly, achieves the purpose of adjusting the distance between the infrared lens and the detector focal plane by rotation after the lens adapter and the detector connecting assembly are threadedly connected, thereby realizing the focusing of the infrared lens with a relatively simple structure. Especially for infrared lenses with suitable fixed focus parameters, it significantly reduces the cost of use while meeting the focusing requirements, thus solving the problem of complex infrared lens focusing structure and high cost of use in related technologies.

[0025] On the other hand, in this embodiment, by setting the first limiting part and the second limiting part to cooperate, the maximum stroke of the infrared lens rotating outward during focusing is limited to prevent the infrared lens from detaching. By setting the second limiting part and the third limiting part to cooperate, the maximum stroke of the infrared lens rotating inward during focusing is limited to prevent the infrared lens from getting too close to the detector. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of the exploded structure of the infrared detector according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the assembly structure of the infrared detector according to an embodiment of the present utility model;

[0029] Figure 3 This is an exploded structural diagram of the infrared lens and lens adapter according to an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the structure in which the first limiting part and the second limiting part abut against each other according to an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of the structure in which the second limiting part and the third limiting part abut against each other according to an embodiment of the present utility model;

[0032] Among them, 1 is an infrared lens, 100 is a first connecting hole, 2 is a lens adapter, 20 is a second limiting part, 21 is a second connecting hole, 3 is a housing, 30 is a mounting channel, 4 is a first limiting assembly, 40 is a lens support, 400 is a positioning post, 41 is a sealing ring, 42 is a sealing ring support frame, 420 is a positioning hole, 43 is a first limiting part, 5 is a detector, 6 is a detector connecting assembly, 60 is a lens flange, 61 is a third limiting part, and 7 is a heat insulation sheet. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein.

[0035] In this invention, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0037] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In addition, the term "multiple" should mean two or more.

[0039] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] To solve related technical problems, such as Figures 1 to 5 As shown, this embodiment of the present invention provides an infrared detector, including:

[0041] Housing 3, with an installation channel 30 provided inside housing 3;

[0042] Infrared lens 1, the rear end of infrared lens 1 is located within the installation channel 30;

[0043] The first limiting component 4 is disposed within the installation channel 30, and the first limiting component 4 includes a first limiting part 43;

[0044] Lens adapter 2 is disposed in the mounting channel 30 and fixed to the rear end of the infrared lens 1. The lens adapter 2 is provided with a second limiting part 20 corresponding to the first limiting part 43. The first limiting part 43 and the second limiting part 20 cooperate to limit the outward movement of the infrared lens 1.

[0045] The detector connection assembly 6 is located in the installation channel 30. The detector connection assembly 6 is threadedly connected to the lens adapter 2. The detector connection assembly 6 is provided with a third limiting part 61. The third limiting part 61 cooperates with the second limiting part 20 to limit the inward movement of the infrared lens 1.

[0046] Detector 5, at least a portion of which is located within the mounting channel 30 and is fixedly connected to the detector connection assembly 6.

[0047] In this embodiment, the front end of the housing 3 has a circular opening for inserting the infrared lens 1 into the mounting channel 30, and the rear end of the housing 3 has a square opening for inserting the detector 5 into the mounting channel 30. It should be noted that the circular opening at the front end and the square opening at the rear end are not limiting and can be adjusted according to the actual structure of the infrared lens 1 and the detector 5.

[0048] The first limiting component 4 is inserted into the rear end of the housing 3 and abuts against the front end of the housing 3. The lens adapter 2 is inserted into the rear end of the housing 3 and is fixedly connected to the rear end of the infrared lens 1. The lens adapter 2 and the rear end of the infrared lens 1 can be fixed by sleeve connection or by threaded connection, etc., and no limitation is made here in this embodiment.

[0049] The detector 5 connector assembly can be pre-fixed to the front end of the detector 5, and then the whole assembly is installed from the rear end of the housing 3. The detector connector assembly 6 and the lens adapter 2 are connected by threads. The lens adapter 2 is fixedly connected to the infrared lens 1. After the detector connector assembly 6 is fixed, the infrared lens 1 can be rotated to move the infrared lens 1 outward and inward, thereby adjusting the distance between the focal plane of the infrared lens 1 and the detector 5.

[0050] like Figure 4 and Figure 5 As shown, to limit the outward and inward rotation travel of the infrared lens 1, in this embodiment, a first limiting part 43 is provided on the first limiting component 4, a second limiting part 20 is provided on the lens adapter 2, and a third limiting part 61 is provided on the detector connecting component 6. The first limiting part 43 and the third limiting part 61 are located in front of and behind the second limiting part 20, respectively. Figure 4 As shown, during the outward rotation of the infrared lens 1, the first limiting part 43 and the second limiting part 20 gradually approach each other. Once the first limiting part 43 and the second limiting part 20 abut against each other, the further outward rotation of the infrared lens 1 is restricted. Similarly, as... Figure 5 As shown, during the process of the infrared lens 1 being rotated inward, the second limiting part 20 and the third limiting part 61 approach each other. When the second limiting part 20 and the third limiting part 61 come into contact with each other, the infrared lens 1 can be restricted from rotating inward further.

[0051] This invention achieves the goal of adjusting the distance between the focal plane of the infrared lens 1 and the detector 5 by rotation after the lens adapter 2 and the detector connection assembly 6 are threadedly connected. This allows for focusing of the infrared lens 1 with a relatively simple structure. In particular, for infrared lenses 1 with suitable fixed-focus parameters, the lens adapter 2 can significantly reduce the cost of use while meeting the focusing requirements. This is very suitable for application scenarios with less focusing, and solves the problem of complex focusing structure and high cost of infrared lens 1 of infrared detector 5 in related technologies.

[0052] On the other hand, in this embodiment, by setting the first limiting part 43 and the second limiting part 20 to cooperate, the maximum stroke of the infrared lens 1 when focusing is limited, so as to prevent the infrared lens 1 from detaching. By setting the second limiting part 20 and the third limiting part 61 to cooperate, the maximum stroke of the infrared lens 1 when focusing is limited, so as to prevent the infrared lens 1 from getting too close to the detector 5.

[0053] like Figure 4 As shown, to ensure that the lens adapter 2 remains connected to the detector connection assembly 6 when the infrared lens 1 is at its maximum external rotation stroke, the thread length on the lens adapter 2 in this embodiment is greater than the distance between the second limiting part 20 and the third limiting part 61. When the infrared lens 1 rotates outward to the point where the first limiting part 43 abuts against the second limiting part 20, the lens adapter 2 remains threadedly connected to the detector connection assembly 6.

[0054] like Figure 1 As shown, in one embodiment of the first limiting component 4, the first limiting component includes a lens support 40, a sealing ring 41, and a sealing ring 41 bracket. The lens support 40, the sealing ring 41, and the sealing ring 41 bracket are sequentially sleeved on the rear end of the infrared lens 1 and fit tightly together; the first limiting part 43 is the rear end face of the sealing ring 41 bracket.

[0055] Specifically, in this embodiment, the first limiting component 4 includes a lens support 40, a sealing ring 41, and a sealing ring 41 bracket arranged sequentially. The lens support 40, the sealing ring 41, and the sealing ring 41 bracket can all be fitted onto the rear end of the infrared lens 1, and the three fit tightly together. The sealing ring 41 can ensure the waterproof and dustproof performance of the infrared lens 1, the sealing ring 41 bracket can support the sealing ring 41, and the lens support 40 can support the infrared lens 1 after it is installed.

[0056] In one embodiment, the sealing ring 41 is a silicone sheet, and the front and rear faces of the silicone sheet are respectively bonded and attached to the lens support 40 and the sealing ring 41 bracket.

[0057] During assembly, double-sided adhesive can be applied to both ends of the silicone sheet first. Then, the silicone sheet and the sealing ring 41 bracket are placed on the lens support 40 in sequence. By pressing the lens support 40 and the sealing ring 41 bracket, the double-sided adhesive at both ends of the silicone sheet is activated, and the three are fixed together to form a dustproof and support assembly.

[0058] The lens support component 40 should be made as long as possible to prevent the lens from wobbling up and down. To reduce weight, plastic can be used, but the plastic material needs to be wear-resistant and have a low coefficient of friction, such as POM / PTFE / PA. The silicone pad's main function is dust and water protection. Silicone rings are avoided here because they generally have too much force, resulting in too much damping and making it too difficult to tighten the lens. If grease or oil is added to the silicone ring to reduce damping, when the infrared lens 1 is on the outermost side, the lens sidewall will carry the grease out of the front housing and expose it on the surface. A relatively soft silicone pad material should be used here, such as one with a Shore A hardness of around 50, and a relatively thin material, such as 0.2-0.3mm, to ensure dust and water protection without affecting the feel.

[0059] like Figure 1 As shown, in order to further improve the connection stability, the lens support 40 and the sealing ring 41 bracket are also connected by screws on the basis of fixing the silicone sheet with double-sided tape.

[0060] To facilitate the positioning of the lens support 40 and the sealing ring 41 bracket, the lens support 40 is provided with a positioning post 400, and the sealing ring 41 bracket is provided with a positioning hole 420. The positioning post 400 and the positioning hole 420 are inserted and engaged. The positioning hole 420 and the positioning post 400 can be provided as one or more.

[0061] like Figure 1 As shown, to facilitate the positioning of the lens support 40, a first positioning flange is provided at the front end of the mounting channel 30 in this embodiment, and a second positioning flange is provided on the lens support 40 to be positioned and fitted with the first positioning flange. During assembly, when the second positioning flange on the lens support 40 abuts against the first positioning flange at the front end of the mounting channel 30, it indicates that the lens support 40 is installed in place.

[0062] In one embodiment, the lens adapter 2 is sleeved and fixed to the rear end of the infrared lens 1, and the lens adapter 2 has a lip on its circumferential side to form a second limiting part 20.

[0063] To facilitate the connection between the lens adapter 2 and the infrared lens 1, an internal thread is provided on the inner side of the lens adapter 2 in this embodiment, and the internal thread is used to connect with the rear thread of the infrared lens 1. Based on the threaded connection, to secure the infrared lens 1 and the lens adapter 2, a first connecting hole 100 is provided on the rear sidewall of the infrared lens 1, and a second connecting hole 21 is provided on the lens adapter 2. A screw can be passed through the first connecting hole 100 and the second connecting hole 21 to achieve a fixed connection between the lens adapter 2 and the infrared lens 1.

[0064] In one embodiment, due to manufacturing errors, when the infrared lens 1 and the lens adapter 2 are tightly connected by threads, the first connecting hole 100 and the second connecting hole 21 are misaligned, making it impossible to securely connect them. Therefore, in this embodiment, an internal thread is provided on the inner side of the lens adapter 2, and it is connected to the rear thread of the infrared lens 1 via the internal thread.

[0065] The infrared lens 1 has a plurality of first connection holes 100 on its rear side wall and the lens adapter 2 has a plurality of second connection holes 21 on its side wall. The plurality of first connection holes 100 are evenly distributed around the rear thread of the infrared lens 1 and the plurality of second connection holes 21 are evenly distributed around the lens adapter 2.

[0066] At least one of the plurality of first connecting holes 100 is used to connect with at least one of the plurality of second connecting holes 21 by screws.

[0067] Specifically, in one embodiment, there are two first connecting holes 100 and four second connecting holes 21. During assembly, when the lens adapter 2 is screwed into position, the connecting holes around the side walls of the infrared lens 1 and the lens adapter 2 may not align. In this case, the lens adapter 2 needs to be screwed back a certain length to align the connecting holes. Then, the set screw is screwed in from the side wall to fix the infrared lens 1 and the lens adapter 2. In this embodiment, the purpose of providing two first connecting holes 100 on the side wall of the infrared lens 1 and four second connecting holes 21 on the lens adapter 2 is to reduce the dimensional error between the infrared lens 1 and the lens adapter 2 in the axial direction, thereby reducing the distance error between the lens and the focal plane of the detector 5 at the front and rear extreme positions.

[0068] like Figure 1 As shown, in one embodiment of the detector connection assembly 6, the detector connection assembly 6 includes a lens flange 60, which is attached to and fixedly connected to the front end face of the detector 5, and a portion of the lens adapter 2 is threadedly connected to the inner side of the lens flange 60.

[0069] The third limiting part 61 is the front end face of the lens flange 60.

[0070] Specifically, in this embodiment, the lens flange 60 is fixed to the front end of the detector 5 with screws, and then the entire assembly is installed into the housing 3 from the rear end. The inner side of the lens flange 60 is provided with internal threads, and the outer side of the lens adapter 2 is provided with external threads, thus enabling a threaded connection between the two. The focusing process of the infrared lens 1 is the process of rotating the lens adapter 2 relative to the threads of the lens flange 60.

[0071] To reduce heat transfer from detector 5 to infrared lens 1, the detector connection assembly 6 in this embodiment further includes a heat insulation plate 7, which is disposed between lens flange 60 and the front end face of detector 5. Holes corresponding to lens flange 60 can be formed on the heat insulation plate 7, thereby clamping the heat insulation plate 7 securely between lens flange 60 and detector 5 when they are fixedly connected. The heat insulation plate 7 can be made of a rigid material with low thermal conductivity, such as wood or plastic.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An infrared detector, characterized in that, include: A housing, wherein an installation channel is provided inside the housing; An infrared lens, the rear end of which is located within the mounting channel; A first limiting component is disposed within the installation channel, and the first limiting component includes a first limiting part; A lens adapter is disposed within the mounting channel and fixed to the rear end of the infrared lens. The lens adapter is provided with a second limiting part corresponding to the first limiting part. The first limiting part and the second limiting part cooperate to limit the outward movement of the infrared lens. A detector connection assembly is disposed within the mounting channel and is threadedly connected to the lens adapter. The detector connection assembly is provided with a third limiting part, which cooperates with the second limiting part to limit the inward movement of the infrared lens. A detector, at least a portion of which is located within the mounting channel and is fixedly connected to the detector connection assembly.

2. The infrared detector according to claim 1, characterized in that, The thread length on the lens adapter is greater than the distance between the second limiting part and the third limiting part.

3. The infrared detector according to claim 1, characterized in that, The first limiting component includes a lens support, a sealing ring, and a sealing ring bracket, wherein the lens support, the sealing ring, and the sealing ring bracket are sequentially sleeved on the rear end of the infrared lens and fit tightly together; The first limiting part is the rear end face of the sealing ring bracket.

4. The infrared detector according to claim 3, characterized in that, The sealing ring is a silicone sheet, and the front and rear faces of the silicone sheet are respectively bonded and attached to the lens support and the sealing ring bracket.

5. The infrared detector according to claim 4, characterized in that, The lens support is provided with a positioning post, and the sealing ring bracket is provided with a positioning hole. The positioning post and the positioning hole are inserted into each other.

6. The infrared detector according to claim 3, characterized in that, The front end of the mounting channel is provided with a first positioning flange, and the lens support is provided with a second positioning flange that is positioned and fitted with the first positioning flange.

7. The infrared detector according to claim 1, characterized in that, The lens adapter is sleeved and fixed to the rear end of the infrared lens, and the lens adapter has a lip along the circumferential direction to form the second limiting part.

8. The infrared detector according to claim 7, characterized in that, The lens adapter has an internal thread on its inner side and is connected to the rear thread of the infrared lens through the internal thread. The infrared lens has a plurality of first connection holes on its rear end sidewall, and the lens adapter has a plurality of second connection holes on its sidewall. The plurality of first connection holes are evenly distributed around the rear end thread of the infrared lens, and the plurality of second connection holes are evenly distributed around the circumference of the lens adapter. At least one of the plurality of first connecting holes is used to connect with at least one of the plurality of second connecting holes by screws.

9. The infrared detector according to claim 1, characterized in that, The detector connection assembly includes a lens flange, which is fitted and fixedly connected to the front end face of the detector, and a portion of the lens adapter is threadedly connected to the inner side of the lens flange. The third limiting part is the front end face of the lens flange.

10. The infrared detector according to claim 9, characterized in that, The detector connection assembly also includes a heat insulation sheet, which is disposed between the lens flange and the front end face of the detector.

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