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

Elise Vernet-Viard; Francoise Delplancke; Norbert N. Hubin; Nancy Ageorges

doi:10.1117/12.363578

27 September 1999 LGS Na spot elongation and Rayleigh scattering effects on Shack-Hartmann wavefront sensor performances

Elise Vernet-Viard, Francoise Delplancke, Norbert N. Hubin, Nancy Ageorges

Author Affiliations +

Proceedings Volume 3762, Adaptive Optics Systems and Technology; (1999) https://doi.org/10.1117/12.363578
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Elise Vernet-Viard, Francoise Delplancke, Norbert N. Hubin, and 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); https://doi.org/10.1117/12.363578

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