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Proceedings Paper

LGS Na spot elongation and Rayleigh scattering effects on Shack-Hartmann wavefront sensor performances
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Paper Abstract

This paper describes the effects of Laser Guide Star spot elongation and Rayleigh scattering on wavefront sensing performances. An analytical model of Rayleigh scattering and a numerical model of laser plume generation at the altitude of the atmospheric sodium layer were developed. These models, integrated into a general Adaptive Optics (AO) simulation, provide information about the non-uniform centroid measurement accuracy on the sensor sub-apertures. The effects of laser power, laser type, laser launching position, sensor sampling and sensor field of view on the AO loop performances are analyzed and discussed.

Paper Details

Date Published: 27 September 1999
PDF: 12 pages
Proc. SPIE 3762, Adaptive Optics Systems and Technology, (27 September 1999); doi: 10.1117/12.363578
Show Author Affiliations
Elise Vernet-Viard, European Southern Observatory (Italy)
Francoise Delplancke, European Southern Observatory (Belgium)
Norbert N. Hubin, European Southern Observatory (Germany)
Nancy Ageorges, National Univ. of Ireland (Chile)

Published in SPIE Proceedings Vol. 3762:
Adaptive Optics Systems and Technology
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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