基于增材制造的碳化硅双面反射镜设计与可靠性验证

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中图分类号：TH703 文献标识码：A doi：10.37188/OPE.20263401.0026

CSTR：32169.14.OPE.20263401.0026

Design and reliability verification of SiC double-sided reflector based on additive manufacturing

WANGChengbin，SUNShengli，SUNXiaojin，MAXiaohao，HUKai （Nation Key Laboratory of Infrared Detection， Shanghai Institute of Technical Physics， Chinese Academy of Sciences，Shanghai 2Ooo83，China） * Corresponding author，E-mail： sitp305@163.com

Abstract： To meet the requirements of high lightweighting and high stifness for a mm double-sided integral reflector-comprising the primary and quaternary mirors in a coaxial four-mirror optical system-a method integrating multi-parameter optimization with silicon carbide（SiC） additive manufacturing is proposed based on conventional lightweight design principles. First，an initial reflector model was established from engineering experience，and key structural dimensions were selected to formulate a multi-parameter optimization framework. The parametric model was then optimized using a multi-objective genetic algorithm．The optimized reflector weighs 6.8kg ，achieving a 32.6% reduction relative to the initial design. After completion of 3D printing，a structural modal test was conducted，yielding a first-order natural frequency of 1964Hz .Following optical processing of both mirror surfaces，gravity impact， vacuum high - low temperature，and vibration tests were performed. The maximum change in surface figure accuracy before and after these tests satisfied the specified requirements. These results confirm the reliability and stability of the SiC double-sided reflector design and demonstrate the robustness of the SiC additive manufacturing process for high-performance integral reflectors.

Key words： additive manufacturing； SiC;double-sided reflector; light weighting； reliability verification

1引言

2 初始结构设计

在同轴四反光学系统中，将主镜和四镜设计成双面共体反射镜能够提高系统的紧凑性和装调效率。（剩余10415字）