Large-diameter main reflecting mirror

A main mirror and large-caliber technology, applied in installation, optics, instruments, etc., can solve problems affecting camera quality, launch costs, manpower and material resources consumption, and easy changes in mirror surface shape, so as to reduce the peak-to-valley value of the mirror surface, The maximum deformation displacement is reduced, and the effect of light weight is good

Inactive Publication Date: 2013-07-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the light weight of large-aperture primary reflectors adopts the method of opening holes on the back, usually with hexagonal holes, triangular holes, fan-shaped holes, etc. The size and distribution of the holes depend on the designer’s experience design or calculation based on empirical formulas , the design theory basis is inaccurate, and the performance of the reflector is unstable. The light weight effect of the mirror is not obvious and the mirror surface shape is easy to change, and the rigidity of the mirror body is not ideal

Method used

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Embodiment Construction

[0021] Such as figure 1 , figure 2 As shown, the present invention includes a mirror surface, a back plate, an outer wall arranged on the outside of the back plate, three circumferentially evenly distributed installation hole walls (3) arranged on the back plate, an outer wall (1) and an installation hole wall (3) ) between multiple reinforced walls (2), multiple reinforced walls (2) including a central hole wall arranged in the center of the back plate, three reinforced wall units uniformly distributed along the circumference of the central hole wall, and three reinforced wall units connected of the three connecting walls.

[0022] Such as figure 1 , figure 2 As shown, the diameter of the main mirror of the two models is 500mm, and both use silicon carbide material. (Material parameters: density 3050kg / m 3 , elastic modulus 280Gpa, Poisson's ratio 0.142)

[0023] Compare the inventive model ( figure 2 ) with the state-of-the-art model ( figure 1 ) lightweight perfo...

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Abstract

The invention provides a large-diameter main reflecting mirror. The large-diameter main reflecting mirror comprises a mirror surface, a back plate, an external wall, three mounting hole walls and a plurality of reinforcing walls, wherein the external wall is arranged on the outer side of the back plate, the three mounting hole walls are evenly distributed on the back plate in a circle, and the plurality of reinforcing walls are arranged between the external wall and the mounting hole walls. The plurality of reinforcing walls comprise a centre hole wall arranged in the center of the back plate, three reinforcing wall units evenly distributed around the centre hole wall and three connection walls connecting the three reinforcing units. The diameter of the large-diameter main reflecting mirror is 500mm, the large-diameter main reflecting mirror is mounted through the manner of back supporting, and the three parts on the periphery of a hole in the back are symmetrical based on variant densimetry calculation.

Description

technical field [0001] The invention provides a structural part of the optical system of a space camera, and in particular relates to a large-diameter main reflector. Background technique [0002] The rapid development of space technology requires space cameras to have higher imaging quality, which requires the continuous increase of space camera aperture. In the prior art, the light weight of large-aperture primary reflectors adopts the method of opening holes on the back, usually with hexagonal holes, triangular holes, fan-shaped holes, etc. The size and distribution of the holes depend on the designer’s experience design or calculation based on empirical formulas , the design theory basis is inaccurate, and the performance of the reflector is unstable. The lightweight effect of the mirror is not obvious and the shape of the mirror surface is easy to change, and the rigidity of the mirror body is not ideal. Contents of the invention [0003] In order to solve the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/183G02B7/192
Inventor 王欣王炜王红娟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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