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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: 2012-03-20
卷号: 51, 期号:9, 页码:1276-1282
文章类型: Article
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. (C) 2012 Optical Society of America
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: SURFACES
收录类别: SCI
语种: 英语
WOS记录号: WOS:000302138100012
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/2372
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Sichuan Univ, Dept Optoelect, Chengdu 610064, Peoples R China
2.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R 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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