Large-caliber optical reflector with back flexible supporting structure

Abstract

The invention relates to a large-caliber optical reflector with a back flexible supporting structure. The problems that too much supporting links exist, the assembling process is complex, the size andthe quality of the supporting back plate are too large in the existing large-caliber reflector back multi-point supporting technology, and the requirement for surface type precision is high under theworking conditions of gravity release and environment temperature change is difficult to be ensured at the same time are effectively solved. The reflector comprises a reflector mirror body, flexiblesupports and a supporting back plate, the number of the flexible supports is three, and the flexible supports are uniformly distributed between the reflector mirror body and the supporting back platein the circumferential direction; each flexible support comprises an isosceles triangular bottom frame and a trapezoid vertical frame which are perpendicular to each other; the three vertexes of the isosceles triangular bottom frame are connected with the back of the reflector mirror body; the top edge of the trapezoid vertical frame is connected with the isosceles triangle bottom frame, the bottom edge of the trapezoid vertical frame is connected with the side surface of the supporting back plate; and the bottom edge of the trapezoid vertical frame adopts a flexible hinge structure, and the two waist parts of the trapezoid vertical frame are correspondingly of a flexible reed structure.

Description

technical field [0001] The invention relates to the technical field of optical precision machinery, in particular to a large-diameter optical mirror with a back flexible support structure. Background technique [0002] The application of space optical remote sensors in the fields of earth observation and space exploration has important scientific and economic significance. Large-aperture mirrors refer to mirrors with a clear aperture greater than 500mm, and are the most important optical components in the optical system of space optical remote sensors. The installation positioning accuracy and surface shape accuracy of the optical mirror directly affect the imaging quality of the optical system. In order to control the overall weight of the remote sensor, it is necessary to carry out a lightweight design on the reflector and control the total thickness of the reflector. This leads to a decrease in the absolute stiffness of the mirror and an increase in its sensitivity to e...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the defects existing in the prior art, the purpose of the present invention is to propose a large-diameter optical mirror with a back flexible support structure, which solves the problem of too many supporting links and the assembly process of the existing multi-point support technology on the back of the large-diameter mirror. Complexity, excessive size and mass of the supporting backplane, and difficulty in simultaneously ensuring high surface accuracy requirements under the conditions of gravity release and ambient temperature changes

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