Optimal design of a phi 760 mm lightweight SiC mirror and the flexural mount for a space telescope

	Optimal design of a phi 760 mm lightweight SiC mirror and the flexural mount for a space telescope
	Li, Z. X.; X. Chen; S. J. Wang and G. Jin
	2017
发表期刊	Review of Scientific Instruments
卷号	88 期号:12
摘要	A flexural support technique for lightweighted Primary Mirror Assembly (PMA) of a space telescope is presented in this article. The proposed three-point flexural mount based on a cartwheel flexure can maintain the surface figure of the PMA in a horizontal optical testing layout. The on-orbit surface error of the PMA causes significant degradation in image quality. On-ground optical testing cannot determine the zero-gravity figure of the PMA due to surface distortion by gravity. We unveiled the crucial fact that through a delicate mounting structure design, the surface figure can remain constant precisely without inducing distinguishable astigmatism when PMA rotates with respect to the optical axis, and the figure can be considered as the zero-gravity surface figure on the orbit. A design case is described to show the lightweight design of a SiC mirror and the optimal flexural mounting. Topology optimization and integrated opto-mechanical analysis using the finite element method are utilized in the design process. The Primary Mirror and mounting structures were fabricated and assembled. After the PMA mirror surface was polished to lambda/50 RMS, optical testing in different clocking configurations was performed, respectively, through rotating the PMA by multiple angles. Test results show that the surface figure remained invariant, indicating that gravity release on the orbit will not cause an additional surface error. Vibration tests including sweep sine and random vibration were also performed to validate the mechanical design. The requirements for the mounting technique in space were qualified. Published by AIP Publishing.
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59042
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li, Z. X.,X. Chen,S. J. Wang and G. Jin. Optimal design of a phi 760 mm lightweight SiC mirror and the flexural mount for a space telescope[J]. Review of Scientific Instruments,2017,88(12).
APA	Li, Z. X.,X. Chen,&S. J. Wang and G. Jin.(2017).Optimal design of a phi 760 mm lightweight SiC mirror and the flexural mount for a space telescope.Review of Scientific Instruments,88(12).
MLA	Li, Z. X.,et al."Optimal design of a phi 760 mm lightweight SiC mirror and the flexural mount for a space telescope".Review of Scientific Instruments 88.12(2017).

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