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题名:
Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test
作者: Guo, Chunfeng1; Su, Xianyu1; Chen, Wenjing1; Lei, Baiping2; Wu, Fan2
刊名: Applied Optics
出版日期: 2012
卷号: 51, 期号:9, 页码:1276-1282
学科分类: Liquid crystal displays - Mirrors - Optical testing
DOI: 10.1364/AO.51.001276
通讯作者: Su, X. (xianyusu@mail.sc.cninfo.net)
文章类型: 期刊论文
中文摘要: An off-axis null Ronchi test is presented to measure the three-dimensional (3D) shape of a large-aperture aspheric mirror. The method designs curved fringe patterns as null sinusoidal gratings by means of phase information and ray tracing. In the process of measurement, the curved fringe patterns are displayed on a transmission-type liquid crystal display (T-LCD) screen, and a CCD camera records the fringe patterns containing the information of deviations of the mirror. The slopes of the deviations of the mirror are obtained by using the recorded fringe patterns. The deviations are restored by integrating, and then the 3D shape of the mirror can be reconstructed. Compared with the classical null Ronchi test, the method can provide enough measured data points and avoid the jagged edges of bands on the null gratings. Moreover, the method can conveniently change period and direction of the curved fringes and accurately control phase shifting. Computer simulations and a preliminary experiment are presented to show the performance of the method. © 2012 Optical Society of America.
英文摘要: An off-axis null Ronchi test is presented to measure the three-dimensional (3D) shape of a large-aperture aspheric mirror. The method designs curved fringe patterns as null sinusoidal gratings by means of phase information and ray tracing. In the process of measurement, the curved fringe patterns are displayed on a transmission-type liquid crystal display (T-LCD) screen, and a CCD camera records the fringe patterns containing the information of deviations of the mirror. The slopes of the deviations of the mirror are obtained by using the recorded fringe patterns. The deviations are restored by integrating, and then the 3D shape of the mirror can be reconstructed. Compared with the classical null Ronchi test, the method can provide enough measured data points and avoid the jagged edges of bands on the null gratings. Moreover, the method can conveniently change period and direction of the curved fringes and accurately control phase shifting. Computer simulations and a preliminary experiment are presented to show the performance of the method. © 2012 Optical Society of America.
收录类别: Ei
项目资助者: National Natural Science Foundation of China [60838002, 61177010]
语种: 英语
WOS记录号: WOS:000302138100012
ISSN号: 1559128X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7008
Appears in Collections:先光中心_期刊论文

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作者单位: 1. Department of Opto-Electronics, Sichuan University, Chengdu 610064, China
2. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Recommended Citation:
Guo, Chunfeng,Su, Xianyu,Chen, Wenjing,et al. Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test[J]. Applied Optics,2012,51(9):1276-1282.
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