Micro stress supporting structure of satellite-borne space reflector

Abstract

The invention provides a micro stress supporting structure of a satellite-borne space reflector. The micro stress supporting structure comprises a primary mirror, a primary mirror base and a primary mirror core shaft; the primary mirror is fixedly connected with the primary mirror core shaft; the primary mirror core shaft passes through the center hole of the primary mirror; the small end of the primary mirror abuts against the primary mirror positioning plate of the primary mirror core shaft; a mechanical limiting boss is designed on the primary mirror core shaft; the primary mirror core shaft is provided with a primary mirror rubber pad, a primary mirror metal pad, a first pressing ring and a second pressing ring respectively; the first pressing ring is provided with a boss; after the micro stress supporting structure is installed, the primary mirror rubber pad presses the fixing end surface of the large end of the primary mirror; the boss of the first pressing ring presses the primary mirror metal pad; the non-protruding surface of the first pressing ring presses the mechanical limiting boss; and the second pressing ring presses the first pressing ring. With the micro stress supporting structure provided by the invention adopted, the magnitude of a pressing force to the primary mirror applied by the pressing rings of the primary mirror can be controlled quantitatively and mechanically, and the fastening degree of the primary mirror can be improved, and requirements for the surface shape of the primary mirror after clamping can be satisfied.

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

Images