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Proceedings Paper

New centroid detection algorithm for the Shack-Hartmann wavefront sensor
Author(s): Sung-Hoon Baik; Seung-Kyu Park; Cheol-Jung Kim; Young-Seok Seo; Young-June Kang
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Paper Abstract

A new center position detecting algorithm of the spot image for the Shack-Hartmann wavefront sensor was developed. The new algorithm is a modified center of weight algorithm, which uses some power of the grey level intensity of the spot images instead of thr grey level intensity itself of the spot images. From experiments, the repeatability and accuracy of the center position detection of the spot images of the Shack-Hartmann wavefrond sensor which used the new algorithm were improved compared with the conventional center position detection algorithm using the center of weight. Applications of the algorithm to measurement of the displacement of the spot images and the Shack-Hartmann wavefront sensor for measuring wavefornt distortion and the experimental results of closed-loop wavefront correction are described in this paper.

Paper Details

Date Published: 5 September 2002
PDF: 10 pages
Proc. SPIE 4926, Adaptive Optics and Applications II, (5 September 2002); doi: 10.1117/12.481700
Show Author Affiliations
Sung-Hoon Baik, Korea Atomic Energy Research Institute (South Korea)
Seung-Kyu Park, Korea Atomic Energy Research Institute (South Korea)
Cheol-Jung Kim, Korea Atomic Energy Research Institute (South Korea)
Young-Seok Seo, Chungnam National Univ. (South Korea)
Young-June Kang, Chonbuk National Univ. (South Korea)

Published in SPIE Proceedings Vol. 4926:
Adaptive Optics and Applications II
Wenhan Jiang; Robert K. Tyson, Editor(s)

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