Off-axis reflector and processing method therefor

Abstract

The invention provides an off-axis reflector, and the reflector comprises a reflective surface, a back surface, a front surface, a back surface, a first side surface, and a second side surface. The reflective surface is opposite to the back surface, and the front surface is opposite to the back surface. The first side surface is opposite to the second side surface, and a first light weight hole layer is disposed between the first side surface and the second side surface. A second light weight hole layer is disposed between the front surface and the back surface. The reflector can obtain higherrigidity, and can effectively solve problems that a conventional reflector is long in processing period and is high in manufacturing cost and a long-strip off-axis reflector is low in rigidity. The invention also provides a processing method for the reflector, and the employs the modification technology for modifying the reflector. Optical processing is carried out on the surface of a modified layer, thereby improving the surface figure accuracy and surface cleanness of the reflector. The method can meet the requirements of visible light.

Description

technical field [0001] The invention relates to the technical field of imaging optics, in particular to an off-axis mirror and a processing method thereof. Background technique [0002] Reflector is an important part of imaging optical system, and its performance directly affects the imaging quality of the optical system. Traditional reflector materials include silicon carbide, fused silica, and glass-ceramics. These materials are difficult to process, with long processing cycles and high manufacturing costs. [0003] Compared with the coaxial optical system, the off-axis optical system can achieve a larger field of view. Most of the mirrors in the off-axis optical system are long and short mirrors with different lengths. The stiffness is relatively poor compared to circular mirrors. In many application fields, especially aerospace and other application fields that have strict quality constraints, the high stiffness design of the mirror is particularly important. Silicon ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the problems of long processing cycle, high manufacturing cost, low rigidity of long off-axis reflectors of traditional reflectors and the technical problem that metal reflectors cannot meet the requirements of high-precision visible light systems, the present invention provides an off-axis Mirror and its processing method

[0007] By using the first layer of lightweight holes and the second layer of lightweight holes, the off-axis reflector can obtain higher rigidity, which can effectively solve the problem of long processing period, high manufacturing cost and long strip shape of traditional reflectors. Problems with low stiffness of off-axis mirrors

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