Design of low temperature infrared off-axis three-mirror collimation system

doi:10.37188/OPE.20233109.1285

CIOMP OpenIR

	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
	2023
Source Publication	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
Volume	31 Issue:9 Pages:1285-1294
Abstract	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.
DOI	10.37188/OPE.20233109.1285
URL	查看原文
Indexed By	ei
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/67644
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation 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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中国科学院长春光学精密机械与物理研究所