Prediction of TMT tertiary mirror surface figure

	Prediction of TMT tertiary mirror surface figure
	Zhao H.; Zhang J.; Zhang L.; Zhang B.
	2014
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
ISSN	ISBN/10072276
卷号	43 期号:12 页码:3983-3987
摘要	TMT (Thirty Meter Telescope) is a thirty meter Ritchey-Chretien optical-infrared telescope. The Third Mirror (M3) is an elliptical flat mirror, whose aperture is 3.594 m 2.568 m, and the weight is 1.8 ton. The M3 system reflects the light coming from the Secondary Mirror System to the science instruments located on the Nasmyth platforms, so the M3 system rotates and tilts as the telescope rotates about the elevation axis to track astronomical objects across the sky. Due to the M3 support system the mirror figure maintains a high precision. The specification requires that the RMS of the mirror surface figure will be less than /5(=632.5 nm) or the SlopeRMS will be less than 1rad. This paper took one of the conceptual designs as an example to illustrate the method of evaluating the SlopeRMS. The axial support system in this plan used an 18 points whiffletree structure while the lateral support system used an 8 points A-frame structure. The FE model was constructed in ANSYS. Then MATLAB was employed to carry out the data processing. In the data processing program, the rigid movement was removed at first. Then the elliptical mirror was normalized into a circle mirror and the defocus and the astigmatism were eliminated. In the end, the SlopeRMS of nine sub -apertures was calculated. This method for evaluating the mirror surface figure is different from the classic one for the primary mirror, but it is effective to evaluate the elliptical mirror surface figure indeed. This method is meaningful in mirror surface figure evaluation.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44284
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhao H.,Zhang J.,Zhang L.,et al. Prediction of TMT tertiary mirror surface figure[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2014,43(12):3983-3987.
APA	Zhao H.,Zhang J.,Zhang L.,&Zhang B..(2014).Prediction of TMT tertiary mirror surface figure.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,43(12),3983-3987.
MLA	Zhao H.,et al."Prediction of TMT tertiary mirror surface figure".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 43.12(2014):3983-3987.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
TMT三镜面形评价过程_赵宏超.caj（1026KB）			开放获取	CC BY-ND	浏览下载