27 September 1999 LGS Na spot elongation and Rayleigh scattering effects on Shack-Hartmann wavefront sensor performances
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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.
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Elise Vernet-Viard, Elise Vernet-Viard, Francoise Delplancke, Francoise Delplancke, Norbert N. Hubin, Norbert N. Hubin, Nancy Ageorges, Nancy Ageorges, } "LGS Na spot elongation and Rayleigh scattering effects on Shack-Hartmann wavefront sensor performances", Proc. SPIE 3762, Adaptive Optics Systems and Technology, (27 September 1999); doi: 10.1117/12.363578; https://doi.org/10.1117/12.363578
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