A micro-stress support structure for a space-borne space mirror

Abstract

A micro-stress supporting structure of a space-borne space mirror provided by the present invention includes a primary mirror, a primary mirror seat, and a primary mirror core shaft. The primary mirror is fixedly connected with the primary mirror mandrel, the primary mirror mandrel passes through the primary mirror central hole, and the small end of the primary mirror is close to the primary mirror positioning plate of the primary mirror mandrel. A mechanical limit boss is designed on the main mirror mandrel, and a main mirror rubber pad, a main mirror metal pad, a first pressure ring and a second pressure ring are sequentially installed on the main mirror mandrel. The first pressure ring has a boss. After the installation is completed, the rubber pad of the primary mirror is pressed against the fixed end surface of the large end of the primary mirror, the boss of the first pressure ring is pressed against the metal pad of the primary mirror, the non-convex surface of the first pressure ring is pressed against the mechanical limit boss, and the second The pressure ring tightly presses the first pressure ring. The support structure provided by the present invention can mechanically and quantitatively control the pressing force of the primary mirror pressure ring on the primary mirror, which can not only improve the fixing and fastening degree of the primary mirror, but also meet the surface shape requirements of the primary mirror after clamping .

Description

technical field [0001] The invention relates to the technical field of space optical remote sensing, in particular to a micro-stress support structure of a space-borne space mirror. Background technique [0002] Telescope systems based on spaceborne cameras and imaging spectrometers generally use two types of optical systems: refraction and reflection. Due to the limitations of materials, processing difficulty and system volume, a reflective optical system is generally used for long-focus and large-aperture telescopic systems, which requires a reflector. As the main mirror of the space mirror is an important part of the spaceborne camera or imaging spectrometer, its surface shape directly affects the imaging quality and transmission of the entire system. Similarly, the harsh launch environment has extremely high requirements on the mechanical properties of the primary mirror assembly. [0003] The support structures commonly used for the primary mirror of spaceborne space ...

AI Technical Summary

Problems solved by technology

[0003] The support structures commonly used for the primary mirror of spaceborne space mirrors are mostly supported by pressure rings or peripheral fixation. The assembly stress brought by these two support methods will affect the surface shape of the primary mirror. Therefore, when fixing the primary mirror, the main Compared with other transmissive lenses, the compression force of the mirror will be a little smaller, resulting in poor mechanical properties of the entire main mirror assembly

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