Signal processing of the Shack-Hartmann wavefront sensor operated with extended targets

Details Signal processing of the Shack-Hartmann wavefront sensor operated with extended targets Signal processing of the Shack-Hartmann wavefront sensor operated with extended targets

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5639...78h&link_type=abstract

Adaptive Optics and Applications III. Edited by Jiang, Wenhan; Suzuki, Yoshiji. Proceedings of the SPIE, Volume 5639, pp. 78-8

Physics

Optics

Scientific paper

When an adaptive optical system is used in an imaging system observing extended targets, a method of correlation can be used to find the relative movements of the sub-images in its Hartman-Shack waterfront sensor. To get a sub-pixel accuracy, a curve fitting method is presented. This paper describes the method in detail, and presents the simulations and experimental results. These results show an accuracy of 0.1 pixels rms.

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