- 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
- Full Text
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