| 色散条纹传感技术用于拼接镜面位移探测的仿真研究 |
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| 作者姓名： | 张勇 张靓 |
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| 作者单位： | 中国科学院国家天文台南京天文光学技术研究所,南京 210042; 中国科学院天文光学技术重点实验室,南京 210042;中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家自然科学基金项目(10703008)资助 |
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| 摘 要： | 根据色散条纹传感技术的基本原理,从物理光学的角度对色散条纹传感器(DFS)进行了模拟研究,仿真出理论干涉图形,并从中采集能量信号,拟合光强分布曲线,得出测量结果.通过比较在不同波段的采样,提出在CCD上开出窗口采集有效信号的2种方法,借以提高检测精度.色散条纹传感器的检测范围为±50μm,检测精度可以达到几十nm.
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| 关 键 词： | 主动光学 拼接镜面 色散条纹传感器 平移误差 |
| 收稿时间： | 2009-09-30 |
| 修稿时间： | 2010-03-12 |
Simulation study on measuring piston error of segmented mirror using dispersed fringe sensoring technology |
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| Authors: | ZHANG Yong ZHANG Liang |
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| Institution: | National Astronomical Observatories / Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China; Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics &Technology, Chinese Academy of Sciences, Nanjing 210042, China; Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | When constructing the segmented primary mirror of a maximum aperture telescope, the piston error of segmented mirrors needs testing accurately. In this paper, a dispersed fringe sensor (DFS) was simulated from physical optics, according to the principle of dispersed fringe sensoring technology. DFS interferograms were produced and signals were sampled from them to obtain the result of detection through fitting curve of light distribution. We compared sampling signals in different wavebands and put forward two methods of sampling effective signals by opening window on a CCD camera to improve measuring precision. The measurement range is as large as ±50μm, and the measurement accuracy is about several tens of nanometers. |
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| Keywords: | active optics segmented mirrors dispersed fringe sensor piston error |
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