Wavefront noise reduction in a Shack-Hartmann wavefront sensor using Kalman filter

Title: Wavefront noise reduction in a Shack-Hartmann wavefront sensor using Kalman filter
Creator: Konnik, Mikhail J.; Welsh, James Stuart
Relation: 2011 International Symposium on Optomechatronic Technologies (ISOT 2011). Proceedings of the 2011 International Symposium on Optomechatronic Technologies (Hong Kong 1-3 November, 2011) p. 335-340
Relation: http://isotproceedings.org/2011paper_by_first_author.htm
Publisher: Chinese University of Hong Kong
Resource Type: conference paper
Date: 2011
Description: Accuracy of centroid coordinates is influenced by a noise in the intensity image that is received from a wavefront sensor. The noise on the intensity image introduces uncertainty to the centroid coordinates, and consequently to the reconstructed wavefront. The analytical model of wavefront noise caused by light noise is proposed. The model accounts an ADC resolution and centroid spots parameters that allow estimating the signal-dependent noise for various quantisation levels. A Kalman-type filter was developed for noise reduction that uses the proposed model of wavefront noise. The comparison between the noised and filtered signals for various quantisation levels is provided.
Subject: control theory; adaptive optics
Identifier: http://hdl.handle.net/1959.13/936790
Identifier: uon:12406
Identifier: ISSN:2304-0572
Language: eng
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