New centroid detection algorithm for the Shack-Hartmann wavefront sensor

Sung-Hoon Baik; Seung-Kyu Park; Cheol-Jung Kim; Young-Seok Seo; Young-June Kang

doi:10.1117/12.481700

5 September 2002 New centroid detection algorithm for the Shack-Hartmann wavefront sensor

Sung-Hoon Baik, Seung-Kyu Park, Cheol-Jung Kim, Young-Seok Seo, Young-June Kang

Proceedings Volume 4926, Adaptive Optics and Applications II; (2002) https://doi.org/10.1117/12.481700
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Sung-Hoon Baik, Seung-Kyu Park, Cheol-Jung Kim, Young-Seok Seo, and Young-June Kang "New centroid detection algorithm for the Shack-Hartmann wavefront sensor", Proc. SPIE 4926, Adaptive Optics and Applications II, (5 September 2002); https://doi.org/10.1117/12.481700

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