Wavefront sensing issues in MCAO |
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| Authors: | Thierry Fusco Magalie Nicolle Grard Rousset Vincent Michau Amandine Blanc Jean-Luc Beuzit Jean-Marc Conan |
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| Institution: | aONERA, département d'optique théorique et appliquée, BP 72, 92322 Châtillon cedex, France;bLaboratoire d'astrophysique de l'observatoire de Grenoble, BP 53, 38041 Grenoble cedex 9, France |
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| Abstract: | The problematic of wavefront sensing in Multiconjugate Adaptive Optics (MCAO) is addressed in this article. We first focus on the sky coverage estimation which drives, in particular, the choice between natural and laser guide stars and therefore has a major impact on wavefront sensor design. Then a comparison between star oriented and layer oriented concepts is proposed. Analytical developments and optimization of the concepts are derived in the simplest MCAO case: the ground layer AO system. From this study, advantages and drawbacks of each concept are highlighted. To cite this article: T. Fusco et al., C. R. Physique 6 (2005). |
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| Keywords: | Turbulence Adaptive Optics Wavefront sensingMots-clé s: Turbulence Optique adaptative Analyse de front d'onde |
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