Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test

	Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test
	Guo, Chunfeng 1; Su, Xianyu 1; Chen, Wenjing 1; Lei, Baiping 2; Wu, Fan 2
刊名	Applied Optics
	2012
卷号	51 期号:9 页码:1276-1282
ISSN号	1559128X
通讯作者	Su, X. (xianyusu@mail.sc.cninfo.net)
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.
学科主题	Liquid crystal displays - Mirrors - Optical testing
收录类别	EI
语种	英语
WOS记录号	WOS:000302138100012
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/7008]
专题	光电技术研究所_先光中心
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
推荐引用方式 GB/T 7714	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.
APA	Guo, Chunfeng,Su, Xianyu,Chen, Wenjing,Lei, Baiping,&Wu, Fan.(2012).Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test.Applied Optics,51(9),1276-1282.
MLA	Guo, Chunfeng,et al."Three-dimensional shape measurement of large-aperture aspheric mirrors by off-axis null Ronchi test".Applied Optics 51.9(2012):1276-1282.