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题名:
Error analysis of correlating Shack-Hartmann wave-front sensor for a point source
作者: Chen Lin-Hui1,2,3; Rao Chang-Hui1,2
刊名: ACTA PHYSICA SINICA
出版日期: 2011-09-01
卷号: 60, 期号:9
关键词: correlating Shack-Hartmann wavefront sensor ; correlation algorithm ; centroiding algorithm ; measuring error
文章类型: Article
英文摘要: In Shack-Hartmann wavefront sensor(SH-WFS) based adaptive optics system, the centroiding algorithm is usually used to estimate the centroid of a point source spot. But the detecting accuracy of the centroiding algorithm is affected by many factors such as threshold selection, so that the centroid position of the spot cannot be evaluated accurataly under the condition of low signal-to-noise ratio (SNR). Comparatively the correlating algorithm for Shack-Hartmann wave front-sensing is more robust because it need not reduce the thresholding. In this paper, based on the the principle of the correlating SH-WFS, the measurement error of the correlating SH-WFS is derived by building up the noise model of the correlating SH-WFS. The influences of spot size, photon noise, read out noise and background light noise on the measurement of the correlating SH-WFS are analyzed systematically. The numerically simulation results and the experimental results are consistent well with the theoretical analyses.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
关键词[WOS]: CENTROID COMPUTATION ; ADAPTIVE OPTICS ; MIRROR ; LIGHT
收录类别: SCI
语种: 英语
WOS记录号: WOS:000295114000025
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3410
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.Chinese Acad Sci, Key Lab Adapt Opt, Chengdu 610209, Peoples R China
2.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Chen Lin-Hui,Rao Chang-Hui. Error analysis of correlating Shack-Hartmann wave-front sensor for a point source[J]. ACTA PHYSICA SINICA,2011,60(9).
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