A high anti-vibration and anti-stray light heat dissipation excellent refrigeration type infrared detector

Abstract

The utility model relates to a high anti -vibration anti -stray light heat dissipation good refrigeration type infrared detector belongs to infrared detector field, include: detector support, as the mounting base of whole equipment, infrared detector, its main part is fixed on the detector support to form the cantilever structure, anti -vibration system, it includes at least one auxiliary support frame and a plurality of rubber support ring, the auxiliary support frame is supported in the cantilever segment outer wall of infrared detector with soft contact mode by rubber support ring, anti -stray light system, it includes a horn -shaped light shield, and the light shield is fixed in the light window front of infrared detector, heat dissipation system, it includes a heat dissipation fin that is arranged in the refrigerating machine outside of infrared detector, and the fan that sets up corresponding to heat dissipation fin. The present application solves the vibration, stray light and heat dissipation three big problems that exist simultaneously in airborne photoelectric equipment.

Description

Technical Field

[0001] This utility model belongs to the field of infrared detectors, specifically relating to a cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation. Background Technology

[0002] Optoelectronic equipment is increasingly widely used in production, daily life, and work, especially airborne optoelectronic equipment. Due to the special nature of the airborne environment, airborne optoelectronic equipment operates year-round in environments of random vibration and high temperatures, making the operating environment increasingly demanding. Therefore, in the design process of optoelectronic equipment, it is necessary to fully consider the impact of vibration, stray light, and high-temperature environments on the imaging effect of optoelectronic equipment. Infrared detectors are one of the most important sensors in optoelectronic equipment, which requires the design of infrared detector components to have high environmental adaptability, ensuring the stability of the optical axis in vibrating environments while meeting the requirements of high-temperature heat dissipation and stray light suppression.

[0003] Random vibration environments place high demands on the installation and fixing stiffness of infrared detectors. The cantilever structure of the infrared detector itself results in poor stiffness, which is reflected in the image as shaking of the scene and objects, seriously affecting the use of the equipment. Therefore, auxiliary supports are added to the infrared detector components to increase the fixing stiffness of the infrared detector and improve the stability of the image.

[0004] Stray light from the external environment and inside the optoelectronic equipment can enter the optical system through layers of reflection, or directly enter the infrared detector through the infrared detector window. This results in white bright spots or white bright bars on the scene in the image, which seriously affects the use of the equipment. Therefore, a light shield is added to the infrared detector components to suppress stray light from the environment and improve image quality.

[0005] Airborne optoelectronic equipment often contains a large number of circuit boards, power supplies and other components that generate a lot of heat. At the same time, the infrared detector itself also generates a lot of heat. The increase in temperature will affect the performance of the infrared detector. This will be reflected in the image as more noise and even vertical stripes, which will seriously affect the image quality. Therefore, heat dissipation fins and fans are added to the infrared detector components to improve the image quality.

[0006] Meanwhile, for continuous zoom optical systems in airborne optoelectronic equipment, especially large-aperture high-magnification coaxial continuous zoom optical systems, the infrared detector component, as the most important imaging component at the tail end, is quite sensitive to the optical axis and imaging quality. Therefore, a good structural design of the infrared detector component can play a significant role in promoting the imaging effect of airborne optoelectronic equipment. Summary of the Invention

[0007] The technical problem to be solved:

[0008] To overcome the shortcomings of existing technologies, this invention provides a cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation. Through integrated design, functional modules such as a light shield, auxiliary support frame, rubber support ring, heat dissipation fins, and fan are combined, achieving multiple performance improvements within a compact structure. This solves the three major problems of vibration, stray light, and heat dissipation that simultaneously exist in airborne optoelectronic equipment.

[0009] The technical solution of this utility model is: a cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation, comprising:

[0010] The detector support 10 serves as the mounting base for the entire device.

[0011] The infrared detector 15 has its main body fixed on the detector support 10, thus forming a cantilever structure.

[0012] The vibration-damping system includes at least one auxiliary support frame and multiple rubber support rings, wherein the auxiliary support frame is supported by the rubber support rings in a soft contact manner around the outer wall of the cantilever section of the infrared detector 15.

[0013] The anti-stray light system includes a horn-shaped light shield 1, which is fixed in front of the light window of the infrared detector 15.

[0014] The heat dissipation system includes a heat dissipation fin 7 arranged in a ring around the outside of the refrigerator of the infrared detector 15, and a fan 16 arranged corresponding to the heat dissipation fin 7.

[0015] A further technical solution of this utility model is: the bottom surface of the detector support 10 is a first precision surface, and the surface that contacts the mounting surface of the infrared detector 15 is a second precision surface. The first precision surface and the second precision surface have parallelism requirements.

[0016] A further technical solution of this utility model is: the detector support 10 is provided with at least two pin holes for cooperating with the corresponding pin holes on the infrared detector 15 to achieve positioning; the detector support 10 is also provided with multiple U-shaped grooves for the installation, adjustment and fixation of the entire component in the optoelectronic device.

[0017] A further technical solution of this utility model is: the inner wall of the light shield 1 is engraved with matte threads and sprayed with matte paint.

[0018] A further technical solution of this utility model is: in the vibration-damping system, the inner diameter of the rubber support ring is smaller than the inner diameter of the auxiliary support frame, so that when the auxiliary support frame is tightened, the compression of the rubber support ring is controlled within the range of 20% to 25%.

[0019] A further technical solution of this utility model is: the vibration-damping system includes two sets of auxiliary support frames, each set of auxiliary support frames having two rubber support rings arranged side by side on the inner ring surface, and the two sets of auxiliary support frames are respectively installed at the front end and middle of the cantilever section of the infrared detector 15; the rubber support rings are radially compressed under the clamping of the auxiliary support frames, forming soft contact with the outer wall of the infrared detector 15, so as to provide auxiliary support for the infrared detector 15, which has poor rigidity due to the large cantilever structure, improve its installation and fixing stiffness, and thus suppress image plane jitter in random vibration environment.

[0020] A further technical solution of this utility model is: the heat dissipation fins 7 have an internal flow guiding structure and an external groove to increase the heat dissipation area.

[0021] A further technical solution of this utility model is: the airflow generated by the fan 16 flows through the airflow guiding structure and the outer wall groove of the heat dissipation fins 7.

[0022] A further technical solution of this utility model is: it also includes a clamp 3, which cooperates with the detector support 10 to assist in fixing the neck of the infrared detector 15.

[0023] A further technical solution of this utility model is: it also includes an interface circuit board 4 and a cooling drive circuit board 6 disposed on the infrared detector 15.

[0024] Beneficial effects

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. This utility model provides a cooled infrared detector component with high vibration resistance, stray light prevention, and excellent heat dissipation. By setting a suitable structural form and assembly scheme, reliable installation and fixation of the infrared detector component in optoelectronic equipment and performance improvement are achieved.

[0027] 2. This utility model improves the installation and adjustment freedom and fixing accuracy of the infrared detector component in optoelectronic equipment by designing a precision surface and two pin holes on the detector support of the infrared detector component, and by designing four U-shaped grooves on the detector support, thereby improving the assembly and adjustment efficiency of the infrared detector component in optoelectronic equipment.

[0028] 3. This utility model increases the fixed rigidity of the infrared detector by adding auxiliary support to the infrared detector component, which solves the image jitter problem caused by the poor rigidity of the infrared detector due to its own cantilever structure, and improves the image stability of airborne equipment in random vibration environment.

[0029] 4. This utility model solves the problem of stray light from the external environment and inside the optoelectronic equipment entering the optical system through layers of reflection, thereby causing white bright spots or white bright bars in the scene in the image, by adding a light shield to the infrared detector component, thus improving the imaging quality of the image in the airborne equipment.

[0030] 5. This utility model solves the problem that the heat generated by the infrared detector itself affects the performance of the infrared detector in airborne optoelectronic equipment, leading to increased image noise and even vertical stripes, by adding heat dissipation fins and a fan to the infrared detector component, thereby improving the imaging quality of images in airborne equipment.

[0031] 6. This utility model adopts a very simple structural form, integrating stray light suppression, infrared detector auxiliary support, and heat dissipation functions, realizing reliable installation and fixation of the infrared detector in optoelectronic equipment. Furthermore, this structural form is compact, small in size, and features a flexible detector support design, making installation convenient and reliable. It is suitable for the installation, adjustment, and fixation of various types of infrared detectors and has great potential for widespread application. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the detector component of this utility model;

[0033] Figure 2 This is a schematic diagram of the auxiliary support of this utility model;

[0034] Figure 3 This is a schematic diagram of the fan fixing method of this utility model;

[0035] Explanation of reference numerals in the attached drawings: 1-sunshade, 2-first auxiliary support frame, 3-clamp, 4-interface circuit board, 5-second auxiliary support frame, 6-cooling drive circuit board, 7-heat dissipation fins, 8-fastening screw, 9-fastening screw, 10-detector support, 11-first rubber support ring, 12-second rubber support ring, 13-third rubber support ring, 14-fourth rubber support ring, 15-infrared detector, 16-fan. Detailed Implementation

[0036] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this utility model, 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] As the core sensor of airborne optoelectronic equipment, the imaging quality of the infrared detector directly determines the overall performance of the equipment. However, the airborne environment is extremely harsh, mainly characterized by three major challenges: high-intensity random vibration, stray light interference from complex environments, and high heat density inside the equipment. This requires infrared detector components to have high vibration resistance, excellent stray light protection capabilities, and efficient heat dissipation performance.

[0039] In the existing technology, there are several technical solutions that attempt to solve the above-mentioned single problem, but all of them have obvious limitations and cannot meet the comprehensive requirements of the airborne environment:

[0040] To address the vibration issue, one approach, as described in CN202221389327.9, is to use an integral frame and clamps for fixation to improve structural rigidity. However, this method is a "rigid connection," which easily transmits stress under high-frequency vibrations and does not solve the inherent rigidity and image plane jitter problems caused by the "large cantilever structure" formed by the detector's location outside the mounting bracket due to optical path requirements. Another approach is to simply pursue a compact structure by embedding the detector inside, as described in CN201920994053.8, where "the detector is located inside the mounting bracket." However, this often sacrifices compatibility and adjustability with the optical system.

[0041] None of the aforementioned existing technical solutions offer effective measures to suppress stray light generated under complex airborne lighting conditions. Stray light directly enters the detector's optical window, forming bright spots or streaks on the image and severely reducing the imaging signal-to-noise ratio.

[0042] CN201920994053.8 utilizes a semiconductor cooler and heat sink for temperature control, but it relies on natural cooling, resulting in insufficient heat dissipation efficiency in high-temperature airborne environments. CN202221389327.9, while incorporating heat sinks, does not mention active cooling methods, and its heat dissipation path is not designed in conjunction with the vibration-resistant structure. More importantly, simply adding active cooling devices such as fans could generate vibrations that exacerbate image jitter, conflicting with vibration resistance objectives.

[0043] To address the aforementioned problems, this utility model provides a cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation, comprising:

[0044] The detector support 10 serves as the mounting base for the entire device.

[0045] The infrared detector 15 has its main body fixed on the detector support 10, thus forming a cantilever structure.

[0046] The vibration-damping system includes at least one auxiliary support frame and multiple rubber support rings, wherein the auxiliary support frame is supported by the rubber support rings in a soft contact manner around the outer wall of the cantilever section of the infrared detector 15.

[0047] The anti-stray light system includes a horn-shaped light shield 1, which is fixed in front of the light window of the infrared detector 15.

[0048] The heat dissipation system includes a heat dissipation fin 7 arranged in a ring around the outside of the refrigerator of the infrared detector 15, and a fan 16 arranged corresponding to the heat dissipation fin 7.

[0049] The above technical solution will be further described in detail below with reference to the accompanying drawings.

[0050] In one embodiment, refer to Figures 1 to 3 As shown, this embodiment provides a cooled infrared detector with high vibration resistance, stray light suppression, and excellent heat dissipation. It includes a light shield 1, a first auxiliary support frame 2, a second auxiliary support frame 5, a clamp 3, an interface circuit board 4, a cooling drive circuit board 6, heat dissipation fins 7, fastening screws 8 and 9, a detector support 10, a first rubber support ring 11, a second rubber support ring 12, a third rubber support ring 13, a fourth rubber support ring 14, an infrared detector 15, and a fan 16. This device can achieve high-rigidity installation and auxiliary support for the infrared detector, while suppressing ambient stray light and efficiently dissipating the large amount of heat generated by the infrared detector itself.

[0051] The detector support 10 serves as an installation platform for the infrared detector. The bottom surface of the detector support 10 is a precision surface, as is the surface containing the mounting holes of the infrared detector; these two surfaces are required to be parallel. The detector support 10 has two pin holes, which cooperate with the pin holes of the infrared detector 15 for installation and positioning. The detector support 10 has four U-shaped grooves for the installation, adjustment, and fixation of the entire infrared detector component within the optoelectronic equipment. These U-shaped grooves allow for forward and backward movement and angular adjustment of the infrared detector component, aligning the imaging surface of the infrared detector component to its theoretical position.

[0052] The light shield 1 is designed in a trumpet shape, with matte threads engraved on its inner wall and coated with matte paint. This increases light scattering and reduces reflection, thereby eliminating and suppressing stray light from the environment. The light shield 1 is fastened to the perimeter of the optical window of the infrared detector 15 using screws. This way, some stray light from the environment is blocked by the outer wall of the light shield 1, while stray light entering the optical system is suppressed by the inner wall of the light shield 1. This reduces the amount of stray light from the environment entering the infrared detector 15 through the optical window, thus improving image quality.

[0053] The first auxiliary support frame 2, the second auxiliary support frame 5, the first rubber support ring 11, the second rubber support ring 12, the third rubber support ring 13, and the fourth rubber support ring 14 are installed at the front end and middle of the infrared detector 15, serving to provide auxiliary support for the infrared detector 15. Due to its large cantilever structure, the infrared detector 15 has relatively poor rigidity, and its internal image plane is located in the front-middle section. In random vibration environments, this can cause image plane jitter, which is reflected in the image as image jitter. The auxiliary supports can greatly improve the installation and fixing rigidity of the infrared detector 15, thereby stabilizing the image. By controlling the inner and outer diameters of the first rubber support ring 11, the second rubber support ring 12, the third rubber support ring 13, and the fourth rubber support ring 14, as well as the inner diameters of the first auxiliary support frame 2 and the second auxiliary support frame 5, the compression of the first rubber support ring 11, the second rubber support ring 12, the third rubber support ring 13, and the fourth rubber support ring 14 is approximately 20% to 25%. This provides auxiliary support for the infrared detector 15 while ensuring that the contact between the first rubber support ring 11, the second rubber support ring 12, the third rubber support ring 13, and the fourth rubber support ring 14 and the infrared detector 15 is a soft contact, thus preventing hard contact from damaging the expensive infrared detector 15.

[0054] The heat dissipation fins 7 are mounted around the infrared detector's refrigerator, which generates the most heat. The heat dissipation fins 7 have an internal airflow guiding structure to increase the contact area between the fins and the refrigerator. The external surface of the fins has grooves to further increase the heat dissipation area, thereby improving their heat dissipation efficiency. During operation, the infrared detector's refrigerator generates a large amount of heat, which is conducted to the heat dissipation fins 7 through contact and radiation. The fan 16 then dissipates this heat through the airflow guiding structure and the air outlet, thus cooling the infrared detector and preventing performance degradation due to overheating.

[0055] The interface circuit board 4 and the cooling drive circuit board 6 are installed on the side of the infrared detector 15 or in a reserved area, and are connected to the infrared detector 15 by cables, and are responsible for signal processing and cooling drive.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A cooled infrared detector with high vibration resistance, stray light protection, and excellent heat dissipation, characterized in that, include: The detector support (10) serves as the mounting base for the entire device. The infrared detector (15) has its main body fixed on the detector support (10), thus forming a cantilever structure; The vibration-damping system includes at least one auxiliary support frame and multiple rubber support rings, wherein the auxiliary support frame is supported by the rubber support rings in a soft contact manner around the outer wall of the cantilever section of the infrared detector (15); The anti-stray light system includes a horn-shaped light shield (1) fixed in front of the light window of the infrared detector (15); The heat dissipation system includes a heat dissipation fin (7) arranged in a ring around the outside of the refrigerator of the infrared detector (15), and a fan (16) arranged corresponding to the heat dissipation fin (7).

2. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: The bottom surface of the detector support (10) is the first precision surface, and the surface that contacts the mounting surface of the infrared detector (15) is the second precision surface. The first precision surface and the second precision surface have parallelism requirements.

3. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: The detector support (10) is provided with at least two pin holes, which are used to cooperate with the corresponding pin holes on the infrared detector (15) to achieve positioning; the detector support (10) is also provided with multiple U-shaped grooves for the installation, adjustment and fixation of the entire component in the optoelectronic device.

4. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: The inner wall of the light shield (1) is engraved with matte threads and sprayed with matte paint.

5. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: In the vibration-damping system, the inner diameter of the rubber support ring is smaller than the inner diameter of the auxiliary support frame, so that when the auxiliary support frame is tightened, the compression of the rubber support ring is controlled within the range of 20% to 25%.

6. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 5, characterized in that: The vibration-damping system includes two sets of auxiliary support frames. Each set of auxiliary support frames has two rubber support rings arranged side by side on the inner ring surface. The two sets of auxiliary support frames are respectively installed at the front end and the middle of the cantilever section of the infrared detector (15). The rubber support rings are radially compressed under the clamping of the auxiliary support frames, forming soft contact with the outer wall of the infrared detector (15) to provide auxiliary support for the infrared detector (15) which has poor rigidity due to the large cantilever structure, thereby improving its installation and fixing stiffness and suppressing image plane jitter in random vibration environment.

7. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: The heat dissipation fins (7) have an internal flow guiding structure and an external groove to increase the heat dissipation area.

8. The cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 7, characterized in that: The airflow generated by the fan (16) flows through the airflow guiding structure and outer wall groove of the heat dissipation fins (7).

9. A cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: It also includes a clamp (3), which cooperates with the detector support (10) to help fix the neck of the infrared detector (15).

10. A cooled infrared detector with high vibration resistance, stray light prevention, and excellent heat dissipation according to claim 1, characterized in that: It also includes an interface circuit board (4) and a cooling drive circuit board (6) disposed on the infrared detector (15).

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