Design of low temperature infrared off-axis three-mirror collimation system | |
W. Li; J. Shen; X. Zhang; Z. Lu; Z. Li; H. Han and Q. Wu | |
刊名 | Guangxue Jingmi Gongcheng/Optics and Precision Engineering
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2023 | |
卷号 | 31期号:9页码:1285-1294 |
ISSN号 | 1004924X |
DOI | 10.37188/OPE.20233109.1285 |
英文摘要 | An off-axis three-mirror collimating optical system is designed to test the infrared equipment in a vacuum 100-K cryogenic environment. The system adopts athermal design,and the whole structure adopts SiC material. A C-shaped opening expansion sleeve is used as a flexible structure to compensate for low-temperature deformation at the connection between the mirror body and the support structure. The whole system is partially wrapped in a radiation cooling panel,except for the reflecting mirror. The low-thermal conductivity thermal insulation support structure plays a thermal shielding role in the heat conduction chain to realize the thermal insulation support and rapid refrigeration of the system. In the 100-K low-temperature environment,according to a system simulation analysis,the primary,secondary,and tertiary mirror wavefront error is 0. 7 at room temperature;at a low temperature,the MTF is >0. 6. Meet the system at 50 lp/mm greater than 0. 6 use requirements. The results indicate that the collimating optical system can output parallel light stably in a 100-K vacuum environment to meet the test requirements of low-temperature infrared equipment. In a material level test of fast radiation cooling,the temperature of the SiC mirror blank is stable at 130 K after 18 h. After 30 h,the mirror blank temperature stabilizes at 110 K. The experiment verifies the feasibility of fast radiation cooling of the SiC mirror. © 2023 Chinese Academy of Sciences. All rights reserved. |
URL标识 | 查看原文 |
内容类型 | 期刊论文 |
源URL | [http://ir.ciomp.ac.cn/handle/181722/67644] ![]() |
专题 | 中国科学院长春光学精密机械与物理研究所 |
推荐引用方式 GB/T 7714 | W. Li,J. Shen,X. Zhang,et al. Design of low temperature infrared off-axis three-mirror collimation system[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2023,31(9):1285-1294. |
APA | W. Li,J. Shen,X. Zhang,Z. Lu,Z. Li,&H. Han and Q. Wu.(2023).Design of low temperature infrared off-axis three-mirror collimation system.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,31(9),1285-1294. |
MLA | W. Li,et al."Design of low temperature infrared off-axis three-mirror collimation system".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 31.9(2023):1285-1294. |
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