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http://dx.doi.org/10.3807/KJOP.2002.13.3.251

A study on a fast measuring algorithm of wavefront for an adaptive optics system  

박승규 (한국원자력연구소 양자광학기술개발팀)
백성훈 (한국원자력연구소 양자광학기술개발팀)
서영석 (한국원자력연구소 양자광학기술개발팀)
김철중 (한국원자력연구소 양자광학기술개발팀)
박준식 (충남대학교 전자공학과, 통신공학연구실)
나성웅 (충남대학교 전자공학과, 통신공학연구실)
Publication Information
Korean Journal of Optics and Photonics / v.13, no.3, 2002 , pp. 251-257 More about this Journal
Abstract
The measuring resolution and speed for wavefronts are important to improve the performance of an adaptive optics system. In this paper, we propose a fast measuring algorithm with high resolution in the Shack-Hartmann wavefront sensor for an adaptive optics system. We designed ground isolated electrical devices whose differential data signals are used to control the deformable mirror and tip/tilt mirror for robust control. The conventional mass centroid algorithm in the Shack-Hartmann sensor to measure wavefront has been widely used and provided good measurement results. In this paper, the proposed fast measuring algorithm for measuring the wavefront combines the conventional mass centroid algorithm with a weighting factor. The weighting factor is a real value estimating the real center of mass in a wavefront spot image. This proposed wavefront measuring algorithm provided fast measurement results with high resolution from experimental tests.
Keywords
adaptive optics system; centroid algorithm; Shack-Hartmann sensor; wavefront;
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