Stress-free alignment of off-axis three-mirror system

	Stress-free alignment of off-axis three-mirror system
	Mei, G.; Y. Zhai; H.-M. Qu and Q.-S. Pu
	2015
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
卷号	23 期号:12 页码:3414-3421
摘要	To overcome the degradations of optical figure accuracy and image quality caused by external or internal stresses from connecting, fastening or temperature changing in the alignment process of an off-axis three-mirror system, stress-free mechanical design and system alignment methods were proposed. The impacts of the stresses on the mirrors were reduced by employing combined inner and outer mounts, setting up flexible links and increasing the delivery distance from stress source to mirror surface. The system frame was positioned without being fastened. Three high precision steel balls and corresponding a conical-hole pedestal, a V-type mount and a plate pedestal were utilized to constrain all six degrees of freedom (DOF) of the system support frame. Two Leica theodolites and two datum cubic prisms were used for monitoring the micro displacement of the support frame. Several digital micrometers were employed to monitor the movement and recovery of six-DOF adjustment mechanisms. Through preliminary and computer-aided alignments, the whole-field-of-view average Root Meant Square (RMS) wavefront error reaches to 0.068, and then becames 0.070 after spacers are ground and connected to the frame. The average Modulation Transfer Function (MTF) (at Nyquist frequency)corresponding to the whole field of view is 0.720. These results meet the performance specifications and verify the feasibility of the proposed methods. 2015, Science Press. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56075
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Mei, G.,Y. Zhai,H.-M. Qu and Q.-S. Pu. Stress-free alignment of off-axis three-mirror system[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(12):3414-3421.
APA	Mei, G.,Y. Zhai,&H.-M. Qu and Q.-S. Pu.(2015).Stress-free alignment of off-axis three-mirror system.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(12),3414-3421.
MLA	Mei, G.,et al."Stress-free alignment of off-axis three-mirror system".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.12(2015):3414-3421.

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