应用光学, 2008, 29 (2): 0298, 网络出版: 2010-06-13  

用于拼接子镜相位误差检测的低相干光谱干涉系统分析

Analysis of low-coherence-spectrum interferometric system applied to phase error detection of segmented mirror
作者单位
1 中国科学院 光电技术研究所,四川 成都 610209
2 中国科学院 研究生院,北京 100039
摘要
针对大口径望远镜拼接式主镜,提出一种基于迈克尔逊干涉原理的低相干光谱干涉检测系统。应用该系统对拼接子镜间相位失调误差进行实时检测,进而对失调子镜进行相应校正,以实现拼接子镜的共面排布。子镜间相位误差通过干涉图形间的不匹配性进行提取。给出了该低相干光谱干涉检测系统的具体结构,叙述了该干涉检测系统的检测原理。针对该系统的干涉条纹对比度V及系统的最低信噪比SNR(d,B,m,i,n)进行了分析,论证了通过该低相干光谱干涉检测系统进行子镜间相位误差检测的可行性。
Abstract
For testing large aperture telescope with a segmented primary mirror,a low-coherence-spectrum interferometric detection system based on the Michelson interferometer principle was put forward to detect the phase error between the “sub-mirrors”,and subsequently correcting the misaligned segments to achieve the mirror coplanar. The phase error between the segments was extracted from the interferograms mismatching. The physical structure of the interferometric detection system with the low-coherence-spectrum was presented,and the detection principle of the interferometric detection system was explained. The interferometric fringe contrast and SNR were analyzed for the interferometric detection system. The feasibility of detecting the phase error with the low-coherence-spectrum interferometric detection system was demonstrated .

宋贺伦, 鲜浩, 李华强, 黄健, 李超宏, 姜文汉. 用于拼接子镜相位误差检测的低相干光谱干涉系统分析[J]. 应用光学, 2008, 29(2): 0298. SONG He-lun, XIAN Hao, LI Hua-qiang, HUANG Jian, LI Chao-hong, JIANG Wen-han. Analysis of low-coherence-spectrum interferometric system applied to phase error detection of segmented mirror[J]. Journal of Applied Optics, 2008, 29(2): 0298.

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