摘要
简述了空间遥感器设计中反射镜材料选择的重要性及影响。对SiC和SiC/Al复合材料与常用光学材料的空间应用综合品质因子进行了比较,SiC材料的综合品质因子为8072.92,高体分SiC/Al复合材料的综合品质因子为1 687.50。并对高体分SiC/Al复合材料应用在反射镜上的光学性能进行了检测。检测结果得出材料的表面粗糙度能够达到1.49 nm,小于5 nm;反射率达到95%以上,能够满足反射镜的性能要求。对采用高体分SiC/Al复合材料作为反射镜和背板材料的相机结构进行分析。分析结果得出整体结构前三阶模态为115 Hz,120 Hz,203 Hz,满足空间遥感器大于100 Hz的技术要求,各反射镜的面形精度满足RMS≤1/50λ(λ=632.8 nm)的技术要求。各项测试数据和有限元分析结果表明,高体份SiC/Al复合材料作为反射镜在空间光学中应用是可行的。
The importance of selected mirror material and its effect on design of space remote sensor was described. The SiC and SiC/Al were compared with common materials and the results showed that the comprehensive figure of merit of SiC was 8 072.92, while that of the high volume fraction SiC/Al composites was 1687.50. Optical performance of SiC/Al was also tested by applying to mirror. The test results show that its surface roughness can achieve 1.49 nm, smaller than 5 nm; its surface figure precision RMS value can achieve 1/5λ（λ=632.8nm） and its reflectivity is more than 95%. These data can meet mirror the performance requirement. The camera structure of its mirror and backplane adopting SiC/Al was analysed. The results show that first three step modes of total structure are 115 Hz, 120Hz, 203 Hz, repectively, which can meet the technical requirements than 100 Hz. Every mirror surface figure precision meets the technical requirement of RMS value lower than 1/50λ （λ=632.8 nm）. The test data and FEA results indicate that high volume fraction SiC/Alcomposites as the mirror material is feasible in the space optics application.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第7期1803-1807,共5页
Infrared and Laser Engineering
基金
国家"863"计划(863-2-5-1-13B)
关键词
高体份SiC/Al复合材料
面形精度
综合品质因子
反射镜
high volume fraction SiC/Al composites material
surface figure precision
comprehensive figure of merit
mirror
