Window sleeve for infrared detector and infrared detection equipment

Abstract

The utility model discloses a window sleeve for an infrared detector and infrared detection equipment, and relates to the technical field of refrigeration infrared detectors, and the window sleeve for the infrared detector comprises a window sleeve body, a window lens, a filter lens and a pressing ring. The top of the window sleeve body is provided with a first cavity used for installing a filter lens. The pressing ring is detachably connected with the window sleeve body, and the bottom of the pressing ring can stretch into the first cavity and is used for pressing the filter lens. The bottom of the first cavity is provided with a second cavity which is smaller than the first cavity in diameter and used for installing a window lens. The bottom of the second cavity is provided with a through hole which is smaller than the second cavity in diameter and penetrates through the bottom of the window sleeve body. According to the design, the size of the cold shield is saved, the heat mass of the Dewar body is reduced, and the working efficiency of the refrigerator is improved; meanwhile, the filter lenses in different spectral ranges can be flexibly replaced, and the application range of the detector is widened.

Description

Technical Field

[0001] This application relates to the field of cooled infrared detector technology, and in particular to a window cover for an infrared detector and an infrared detection device. Background Technology

[0002] Cooled infrared detectors are detectors that use cooling technology to improve infrared detection performance. With the development of technology, cooled infrared detectors are widely used in military and civilian fields.

[0003] The widely used cooled infrared detectors employ filters mounted on top of a cooled screen, which undoubtedly increases the thermal mass of the Dewar and consequently affects the efficiency of the cooling system. Furthermore, the filters are fixed to the top of the cooled screen with low-temperature adhesive, making it impossible to replace them with filters of different spectral ranges, thus limiting the application of infrared detectors.

[0004] Therefore, there is an urgent need to provide a solution to address the above problems. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a window cover for an infrared detector and an infrared detection device to solve the technical problems of existing filter lens installation having limitations such as affecting the working efficiency of the refrigerator and being unable to be replaced.

[0006] To achieve the above technical objectives, this application provides a window sleeve for an infrared detector, including a window sleeve body, a window lens, a filter lens, and a pressure ring;

[0007] The top of the window frame body is provided with a first recess for installing the filter lens;

[0008] The pressure ring is detachably connected to the window sleeve body, and its bottom can extend into the first recess and be used to press the filter lens;

[0009] The bottom of the first cavity has a second cavity with a smaller diameter than the first cavity, which is used to install the window lens;

[0010] The bottom of the second recess has a through hole with a diameter smaller than that of the second recess and that penetrates the bottom of the window frame body.

[0011] Furthermore, a third recess is provided at the bottom of the window frame body;

[0012] The diameter of the third cavity is larger than the diameter of the through hole.

[0013] Furthermore, a sealing ring is provided between the filter lens and the bottom of the first concave cavity, surrounding the second concave cavity.

[0014] Furthermore, the bottom of the first cavity is provided with a sealing groove surrounding the second cavity;

[0015] The sealing ring is fitted into the sealing groove, and its top extends out of the sealing groove to contact and abut against the bottom of the filter lens.

[0016] Furthermore, the inner peripheral wall of the first cavity is provided with an internal thread structure;

[0017] The outer peripheral wall of the pressure ring is provided with an external thread structure that engages with the internal thread structure.

[0018] Furthermore, the pressure ring is detachably connected to the window frame body via fasteners.

[0019] Furthermore, the upper end of the outer peripheral wall of the pressure ring is provided with a flange portion;

[0020] The flange portion can contact the top of the window frame body, and it is provided with a through hole for the fastener to pass through;

[0021] The top of the window frame body is provided with a series of through holes, and threaded holes for the fasteners to be inserted and threadedly connected to the fasteners.

[0022] The fastener is used to secure the flange to the window frame body.

[0023] Furthermore, there are multiple vias, which are evenly distributed around the circumference;

[0024] There are multiple threaded holes, and each of them corresponds to a via hole;

[0025] There are multiple fasteners, and each fastener corresponds to one of the threaded holes.

[0026] Furthermore, the window lens is bonded and fixed to the bottom of the second recessed cavity with sealant.

[0027] This application also discloses an infrared detection device, including a Dewar body and a window sleeve for the infrared detector;

[0028] The infrared detector is mounted on the top of the Dewar body using a window cover.

[0029] As can be seen from the above technical solutions, the window sleeve for the infrared detector designed in this application has the following beneficial effects:

[0030] 1. The window lens and filter lens are integrated and installed on the window frame body, and then connected to the Dewar body, which saves the volume of the cold shield, reduces the thermal mass of the Dewar body, and improves the working efficiency of the refrigeration unit.

[0031] 2. The filter lens is clamped and fixed by a detachable pressure ring, which allows for flexible replacement of filter lenses with different spectral ranges, increasing the application range of the detector. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a cross-sectional view of a window sleeve for an infrared detector provided in this application;

[0034] Figure 2 This is a cross-sectional view of the window frame body of an infrared detector window frame provided in this application;

[0035] Figure 3 This is a cross-sectional view of an infrared detection device provided in this application;

[0036] In the figure: 1. Window frame body; 11. First cavity; 12. Second cavity; 13. Through hole; 14. Third cavity; 15. Sealing groove; 16. Threaded hole; 2. Filter lens; 3. Window lens; 4. Pressure ring; 41. Flange; 42. Through hole; 5. Sealing ring; 6. Fastener; 7. Dewar body; 71. Cold finger; 72. Dewar main body. Detailed Implementation

[0037] 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 the 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 protection scope of the embodiments of this application.

[0038] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0040] This application discloses a window cover for an infrared detector and an infrared detection device.

[0041] Please see Figure 1 as well as Figure 3 One embodiment of an infrared detector window cover provided in this application includes:

[0042] Window frame body 1, window lens 3, filter lens 2, and pressure ring 4.

[0043] The top of the window frame body 1 is provided with a first recess 11 for installing the filter lens 2.

[0044] The pressure ring 4 is detachably connected to the window sleeve body 1, and its bottom can extend into the first recess 11 to press the filter lens 2.

[0045] The bottom of the first cavity 11 is provided with a second cavity 12 with a diameter smaller than that of the first cavity 11, which is used to install the window lens 3. The central axes of the first cavity 11 and the second cavity 12 coincide and are coaxially arranged. The purpose of the second cavity 12 having a smaller diameter than the first cavity 11 is to allow sufficient space at the bottom of the first cavity 11 to support and fix the filter lens 2.

[0046] The bottom of the second recess 12 is provided with a through hole 13 with a diameter smaller than that of the second recess 12 and penetrating the bottom of the window frame body 1; similarly, the central axes of the second recess 12 and the through hole 13 coincide and are coaxially arranged. The purpose of the through hole 13 having a diameter smaller than that of the second recess 12 is to allow sufficient space at the bottom of the second recess 12 for supporting and fixing the window lens 3.

[0047] The infrared detector window sleeve designed in this application has the following beneficial effects:

[0048] 1. The window lens 3 and the filter lens 2 are integrated and installed on the window sleeve body 1, and then connected to the Dewar body 7, which saves the volume of the cold screen, reduces the thermal mass of the Dewar body 7, and improves the working efficiency of the refrigeration unit.

[0049] 2. The filter lens 2 is clamped and fixed by a detachable pressure ring 4, which allows for flexible replacement of filter lenses 2 with different spectral ranges, increasing the application range of the detector.

[0050] The above is Embodiment 1 of an infrared detector window cover provided in this application. The following is Embodiment 2 of an infrared detector window cover provided in this application. Please refer to the following for details. Figures 1 to 3 .

[0051] Based on the solution of Embodiment 1 above:

[0052] Furthermore, such as Figure 1 as well as Figure 3 As shown, a third recess 14 is provided at the bottom of the window frame body 1, and the diameter of the third recess 14 is larger than the diameter of the through hole 13. The purpose of providing the third recess 14 is to adapt to the window size at the top of the Dewar body 7, so as to better connect and fit with the top of the Dewar body 7.

[0053] Furthermore, a sealing ring 5 (O-ring) is provided between the filter lens 2 and the bottom of the first concave cavity 11, surrounding the second concave cavity 12.

[0054] The sealing ring 5 can effectively prevent external dust, moisture, impurities, etc. from entering the internal structure, and at the same time play a certain positioning and buffering role. During the assembly process, the sealing ring 5 can help the filter lens 2 to be better fixed at the corresponding position at the bottom of the first concave cavity 11, making its installation more stable and reducing the possibility of displacement or loosening of the filter lens 2 due to external factors such as vibration and shaking. At the same time, when subjected to the pressing action of the pressure ring 4 / slight collision or vibration, the sealing ring 5 can also buffer the external force to a certain extent, protecting the filter lens 2 and its related internal optical structure from damage, and improving the structural stability and reliability of the entire device.

[0055] Furthermore, the bottom of the first cavity 11 is provided with a sealing groove 15 surrounding the second cavity 12; the sealing ring 5 is embedded in the sealing groove 15, and its top extends out of the sealing groove 15 to contact and abut against the bottom of the filter lens 2.

[0056] The sealing groove 15 provides a precise installation and positioning space for the sealing ring 5, allowing it to be securely embedded within it. This prevents the sealing ring 5 from shifting or slipping during use, thus ensuring the stability and continuity of the seal. Furthermore, the top of the sealing ring 5 extends out of the sealing groove 15 and makes tight contact with the bottom of the filter lens 2, further filling any possible tiny gaps and forming a more robust sealing barrier.

[0057] Furthermore, regarding the detachable connection design between the pressure ring 4 and the window frame body 1, an internal thread structure can be provided on the inner peripheral wall of the first cavity 11, and correspondingly, an external thread structure that engages with the internal thread structure is provided on the outer peripheral wall of the pressure ring 4.

[0058] The threaded connection provides strong fastening force, ensuring that the pressure ring 4 is tightly connected to the window frame body 1. This effectively prevents the pressure ring 4 from loosening or falling off during equipment use due to vibration, shaking, or external impact, thus ensuring the long-term stability of the connection between the two.

[0059] Operators can easily complete the pressing of the filter lens 2 or the disassembly of the pressure ring 4 and the window frame body 1 by simply rotating the pressure ring 4 to engage or unscrew its external thread with the internal thread of the inner circumferential wall of the first cavity 11. The whole process does not require complicated special tools and is relatively simple and easy to carry out.

[0060] Furthermore, regarding the detachable connection design between the pressure ring 4 and the window frame body 1, the pressure ring 4 can also be detachably connected to the window frame body 1 via fasteners 6.

[0061] Specifically, the upper end of the outer peripheral wall of the pressure ring 4 is provided with a flange portion 41.

[0062] The flange 41 can contact the top of the window frame body 1, and has a through hole 42 for the fastener 6 to pass through; the top of the window frame body 1 has a through hole 42 and a threaded hole 16 for the fastener 6 to be inserted and threadedly connected to the fastener 6; the fastener 6 is used to fasten the flange 41 to the window frame body 1 together.

[0063] Fastener 6 can be a screw, bolt, or other threaded connector; there are no specific restrictions.

[0064] The use of fasteners 6 (such as screws and bolts) for connection makes the installation and removal of the pressure ring 4 intuitive and straightforward. Operators only need to use conventional tools (such as screwdrivers and wrenches) to pass the fasteners 6 through the through-hole 42 of the flange 41 and screw them into the threaded hole 16 of the window sleeve body 1 to quickly fix the pressure ring 4. When it is necessary to remove the pressure ring 4, the reverse operation can be performed to easily remove it. The entire process requires no complex professional skills or special equipment, greatly improving the efficiency of equipment assembly and maintenance. It is especially suitable for equipment assembly on large-scale production lines and scenarios requiring frequent component replacement and maintenance, significantly reducing downtime and improving production efficiency.

[0065] The compression ring 4 in this application can be made of nylon material.

[0066] Furthermore, there are multiple vias 42, which are evenly distributed around the circumference;

[0067] There are multiple threaded holes 16, and each one corresponds to a through hole 42;

[0068] There are multiple fasteners 6, and each one corresponds to a threaded hole 16.

[0069] Multiple fasteners 6 are evenly distributed around the circumference, enabling the pressure ring 4 and the window frame body 1 to evenly bear external forces from all directions at the connection point. Whether it is vibration or impact generated during operation, or tension or pressure during normal use, these external forces will be evenly distributed across the entire connection surface through the evenly distributed fasteners 6, avoiding stress concentration in local areas and effectively preventing problems such as deformation or damage to the connection point due to excessive local stress.

[0070] Furthermore, the window lens 3 is bonded and fixed to the bottom of the second concave cavity 12 with (low temperature) sealant. Of course, other fixing and connection methods are also possible, and there are no specific restrictions.

[0071] During the bonding process between the window lens 3 and the bottom of the second recess 12, the low-temperature sealant fills the tiny gaps between them, forming a reliable sealing barrier to ensure the vacuum environment inside the Dewar. Simultaneously, as an adhesive, the sealant provides sufficient bonding force to firmly fix the window lens 3 to the bottom of the second recess 12, preventing displacement, loosening, or detachment even under external forces such as vibration, shaking, or minor impacts during normal use.

[0072] like Figure 3 As shown, this application also discloses an infrared detection device, including a Dewar body 7 and an infrared detector window sleeve; the infrared detector window sleeve is installed on the top of the Dewar body 7.

[0073] The Dewar body 7 consists of a cold finger 71 at the bottom and a Dewar body 72 located on the cold finger 71. The window sleeve for the infrared detector can be fixed to the top of the Dewar body 72 by laser welding, so as to achieve an integral connection with the Dewar body 7.

[0074] The above provides a detailed description of an infrared detector window cover and an infrared detection device provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A window cover for an infrared detector, characterized in that, Includes window frame body (1), window lens (3), filter lens (2) and pressure ring (4); The top of the window frame body (1) is provided with a first recess (11) for installing the filter lens (2). The pressure ring (4) is detachably connected to the window sleeve body (1), and its bottom can extend into the first recess (11) and be used to press the filter lens (2). The bottom of the first cavity (11) is provided with a second cavity (12) with a diameter smaller than that of the first cavity (11) and for installing the window lens (3). The bottom of the second cavity (12) is provided with a through hole (13) with a diameter smaller than the second cavity (12) and penetrating the bottom of the window frame body (1).

2. The window cover for the infrared detector according to claim 1, characterized in that, The bottom of the window frame body (1) is provided with a third recess (14). The diameter of the third cavity (14) is larger than the diameter of the through hole (13).

3. The window cover for the infrared detector according to claim 1, characterized in that, A sealing ring (5) is provided between the filter lens (2) and the bottom of the first cavity (11) and surrounds the second cavity (12).

4. The window cover for the infrared detector according to claim 3, characterized in that, The bottom of the first cavity (11) is provided with a sealing groove (15) surrounding the second cavity (12); The sealing ring (5) is fitted into the sealing groove (15), and its top extends out of the sealing groove (15) and contacts and abuts against the bottom of the filter lens (2).

5. The window cover for the infrared detector according to claim 1, characterized in that, The inner peripheral wall of the first cavity (11) is provided with an internal thread structure; The outer peripheral wall of the pressure ring (4) is provided with an external thread structure that is threaded to the internal thread structure.

6. The window cover for the infrared detector according to claim 1, characterized in that, The pressure ring (4) is detachably connected to the window frame body (1) by fasteners (6).

7. The window cover for an infrared detector according to claim 6, characterized in that, The upper end of the outer peripheral wall of the pressure ring (4) is provided with a flange (41). The flange (41) can contact the top of the window frame body (1) and has a through hole (42) for the fastener (6) to pass through. The top of the window frame body (1) is provided with a through hole (42) that communicates with the through hole (42) and a threaded hole (16) for the fastener (6) to be inserted and threadedly connected to the fastener (6). The fastener (6) is used to fasten the flange (41) to the window frame body (1).

8. The window sleeve for an infrared detector according to claim 7, characterized in that, The vias (42) are multiple and evenly distributed around the circumference; There are multiple threaded holes (16), and each of them corresponds to a through hole (42). There are multiple fasteners (6), and each one corresponds to a threaded hole (16).

9. The window cover for an infrared detector according to claim 1, characterized in that, The window lens (3) is bonded and fixed to the bottom of the second cavity (12) with sealant.

10. An infrared detection device, characterized in that, Includes the Dewar body (7) and the window cover for the infrared detector as described in any one of claims 1 to 9; The infrared detector is mounted on the top of the Dewar body (7) using a window cover.

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