Compact low-temperature reflector supporting structure suitable for wide temperature range

Abstract

The invention relates to a compact low-temperature reflector supporting structure suitable for a wide temperature range. The device comprises a reflector and a reflector supporting structure. The reflector supporting structure comprises a reflector supporting ring and a reflector flexible support. The outer edge of the reflecting mirror is supported and connected to the inner edge of the reflecting mirror supporting ring through a plurality of reflecting mirror flexible supports; that is, the reflector is supported by the periphery of the support ring. The structure compactness of the system is improved, meanwhile, good thermal stress release capacity is provided, the arrangement of a cooling structure on the back of the reflector is supported, the temperature uniformity of the reflector is improved, heat leakage of a reflector assembly is reduced, and high assembly adaptability and engineering implementation are achieved.

Description

Technical Field

[0001] The invention relates to a supporting structure of an optical reflector, in particular to a compact low-temperature reflector supporting structure suitable for a wide temperature range. Background Art

[0002] In extreme environment applications such as space remote sensing, infrared imaging, and deep space observation, silicon carbide mirrors have become the preferred mirror material for small and medium-aperture cryogenic optical systems due to their high specific stiffness, low thermal expansion coefficient, and excellent thermal conductivity. However, under complex thermal loads and assembly environments, the structural support method of the mirror directly affects its imaging quality and system stability.

[0003] At present, the Chinese invention patent application disclosure (publication number: CN103472566A) discloses a zero-expansion flexible damping support device for a space mirror. By using a combination of materials with different expansion coefficients, it ensures that the length of the flexible rod is approximately zero deformation under different temperature conditions, but the assembly accuracy requirements are stringent. In addition, traditional small and medium-caliber mirror support structures mostly use back rigid support or point contact installation methods. Although they have a certain assembly stability at room temperature, under extreme temperature gradients or thermal cycle conditions, thermal stress coupling often causes structural warping, stress concentration at the support position, or mirror misalignment. At the same time, the overall thermal control requirements of the system are increasing. The mirror structure needs to take into account thermal insulation, compactness, and cooling channel layout space. Traditional structures are difficult to meet all of these requirements at the same time. Summary of the Invention

[0004] The purpose of the present invention is to provide a compact low-temperature mirror support structure suitable for a wide temperature range, which mainly solves the shortcomings of the above-mentioned existing technologies. While improving the compactness of the system structure, it provides good thermal stress release capability, supports the arrangement of the cooling structure on the back of the mirror, improves the temperature uniformity of the mirror, reduces heat leakage of the mirror assembly, and has high assembly adaptability and engineering feasibility.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is:

[0006] A compact low-temperature reflector support structure suitable for a wide temperature range, comprising a reflector and a reflector support structure; characterized in that:

[0007] The reflector support structure includes a reflector support ring and a reflector flexible support; the outer edge of the reflector is connected to the inner edge of the reflector support ring through a plurality of reflector flexible supports; that is, the reflector is supported by the periphery of the support ring.

[0008] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that the reflector is bonded to the reflector flexible support.

[0009] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that the reflector is bonded to the reflector flexible support by epoxy resin.

[0010] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that: the inner diameter of the reflector support ring is slightly larger than the outer diameter of the reflector; and the reflector flexible support is integrated into the inner edge of the reflector support ring.

[0011] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that the flexible support of the reflector includes a connecting part and a supporting part, one end of the connecting part is connected to the inner edge of the reflector support ring, and the other end of the connecting part is connected to the supporting part, and there is a flexible gap between the inner end surface of the supporting part and the inner edge of the reflector support ring.

[0012] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that: the reflector is a silicon carbide reflector; and the reflector support ring is made of Invar material and has a lightweight structure.

[0013] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that three or six flexible supports of the reflector are preferably provided and are evenly and equidistantly distributed.

[0014] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that the outer edge of the reflector support ring is evenly distributed and connected to a number of flexible thermal insulation support structures.

[0015] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that: the flexible thermal insulation support structures are preferably provided in three or six and are evenly and equidistantly distributed; each flexible thermal insulation support structure is fixedly connected to the reflector support ring by screws.

[0016] The compact low-temperature reflector support structure suitable for a wide temperature range is characterized in that each flexible thermal insulation support structure is connected to a thermal insulation pad made of a high thermal resistance material via screws.

[0017] The advantages of the present invention are as follows:

[0018] 1. In the compact low-temperature reflector support structure suitable for a wide temperature range of the present invention, the peripheral support of the reflector has a smaller optical axis dimension than the back support of the prior art, thereby improving the compactness of the reflector assembly structure.

[0019] 2. In the compact low-temperature reflector support structure suitable for a wide temperature range of the present invention, the reflector and the reflector support ring are bonded with epoxy, which reduces the difficulty of assembly and improves the assembly efficiency.

[0020] 3. In a compact, low-temperature mirror support structure suitable for a wide temperature range, the mirror support ring is constructed of lightweight Invar steel to reduce thermal stress caused by the mismatch in thermal expansion coefficients between the support ring and the mirror. The mirror support ring acts as a thermal stress relief structure, minimizing the effects of external deformation on the mirror's surface accuracy.

[0021] 4. In the compact low-temperature reflector support structure suitable for a wide temperature range of the present invention, a flexible support for the reflector is designed at the reflector bonding position, which reduces the influence of external thermal stress and thermal deformation on the surface accuracy of the reflector.

[0022] 5. In the compact low-temperature reflector support structure suitable for a wide temperature range of the present invention, the reflector support ring does not block the back of the reflector, which facilitates the installation of a cold screen or cold chain on the back of the reflector to achieve cooling of the reflector, which is beneficial to improving the uniformity of the reflector temperature.

[0023] 6. In the compact low-temperature mirror support structure suitable for a wide temperature range of the present invention, a multi-dimensional flexible structure (flexible thermal insulation support structure) is designed on the flexible thermal insulation support structure, and a thermal insulation pad made of high thermal resistance material is coupled, which is beneficial to reducing the influence of thermal stress generated by external structural deformation on the surface accuracy of the mirror and reducing the heat leakage of the mirror assembly to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of a reflector support structure in the present invention.

[0026] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0027] Figure 4 It is a structural schematic diagram of the flexible thermal insulation support structure and the thermal insulation pad in the present invention. DETAILED DESCRIPTION

[0028] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention.It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

[0029] See also Figure 1-4 The present invention discloses a compact low-temperature reflector support structure suitable for a wide temperature range, which includes a reflector 100 and a reflector support structure.

[0030] The reflector support structure includes a reflector support ring 200 and flexible reflector supports 201, 202, and 203. The outer edge of the reflector 100 is supported and connected to the inner edge of the reflector support ring 200 via a plurality of flexible reflector supports 201, 202, and 203; that is, the reflector 100 is supported by the support ring. During use, the reflector support ring 200 is provided with multiple flexible reflector supports 201, 202, and 203. These supports reduce the radial support stiffness of the reflector, thereby minimizing the effects of external thermal stress and thermal deformation on the reflector's surface accuracy. Furthermore, the reflector support ring 200 prevents obstruction of the back of the reflector.

[0031] In the present invention, the reflector 100 is bonded to the reflector flexible supports 201, 202, 203. In particular, the reflector 100 is bonded to the reflector flexible supports 201, 202, 203 by epoxy resin.

[0032] like Figure 2 、 3 The reflector support ring 200 is annular, with an inner diameter slightly larger than the outer diameter of the circular reflector 100. The flexible reflector supports 201, 202, and 203 are integrally formed on the inner edge of the reflector support ring 200. Each flexible reflector support 201, 202, and 203 includes a connecting portion and a supporting portion. One end of the connecting portion is connected to the inner edge of the reflector support ring 200, and the other end is connected to the supporting portion. A flexible gap is formed between the inner end surface of the supporting portion and the inner edge of the reflector support ring 200.

[0033] Of course, the reflector flexible supports 201 , 202 , 203 may also be installed on the inner edge of the reflector support ring 200 by assembling (such as embedding), but the existence of a flexible gap needs to be ensured.

[0034] As a preferred structure, the reflector 100 is a silicon carbide reflector; the reflector support ring 200 is made of Invar material and has a lightweight structure to reduce the thermal stress caused by the mismatch of thermal expansion coefficients between the support ring and the reflector.

[0035] In the present invention, the reflector flexible supports 201, 202, 203 are preferably provided in three or six pieces and are evenly and equidistantly distributed.

[0036] like Figure 1 、 4The outer edge of the reflector support ring 200 is also evenly distributed and connected to several flexible thermal insulation support structures 300. Preferably, three or six flexible thermal insulation support structures 300 are provided and evenly spaced. Each flexible thermal insulation support structure 300 is fixedly connected to the reflector support ring 200 via screws (e.g., M6 screws). Each flexible thermal insulation support structure 300 is also connected to a thermal insulation pad 400 made of high thermal resistance material via screws (e.g., M6 screws). Thus, the reflector 100 can be secured to the camera frame via the flexible thermal insulation support structures 300 and the thermal insulation pad 400.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A compact low-temperature reflector support structure suitable for a wide temperature range, comprising a reflector (100) and a reflector support structure; characterized in that: The reflector support structure comprises a reflector support ring (200) and reflector flexible supports (201, 202, 203); the outer edge of the reflector (100) is supported and connected to the inner edge of the reflector support ring (200) via a plurality of reflector flexible supports (201, 202, 203); that is, the reflector (100) adopts a support ring peripheral support method.

2. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 1, characterized in that: The reflector (100) is bonded to a reflector flexible support (201, 202, 203).

3. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 2, characterized in that: The reflector (100) is bonded to the reflector flexible support (201, 202, 203) by epoxy resin.

4. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 1, characterized in that: The inner diameter of the reflector support ring (200) is slightly larger than the outer diameter of the reflector (100); and the reflector flexible supports (201, 202, 203) are integrally formed on the inner edge of the reflector support ring (200).

5. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 4, characterized in that: The reflector flexible support (201, 202, 203) comprises a connecting portion and a supporting portion, wherein one end of the connecting portion is connected to the inner edge of the reflector support ring (200), and the other end of the connecting portion is connected to the supporting portion, and a flexible gap is provided between the inner end surface of the supporting portion and the inner edge of the reflector support ring (200).

6. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 1, 2, 3, 4, or 5, characterized in that: The reflector (100) is a silicon carbide reflector; the reflector support ring (200) is made of invar material and has a lightweight structure.

7. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 1, 2, 3, 4, or 5, characterized in that: The reflector flexible supports (201, 202, 203) are preferably provided in three or six portions and are evenly and equidistantly distributed.

8. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 1, 2, 3, 4, or 5, characterized in that: The outer edge of the reflector support ring (200) is also evenly distributed and connected to a plurality of flexible heat-insulating support structures (300).

9. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 8, characterized in that: The flexible heat-insulating support structures (300) are preferably provided in three or six portions and are evenly and equidistantly distributed; each flexible heat-insulating support structure (300) is fixedly connected to the reflector support ring (200) via screws.

10. The compact cryogenic mirror support structure suitable for a wide temperature range according to claim 9, characterized in that: Each flexible heat-insulating support structure (300) is connected to a heat-insulating pad (400) made of a high heat-resistance material via screws.

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