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Proceedings Paper

PSD-based simulation algorithm for Wide FoV AO design: application to ELT studies
Author(s): B. Neichel; T. Fusco; J.-M. Conan; C. Petit; G. Rousset
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Paper Abstract

Several Wide Field of view Adaptive Optics [WFAO] concepts like Multi-Conjugate AO [MCAO], Multi-Object AO [MOAO] or Ground-Layer AO [GLAO] are under study for the next generation of Extremely Large Telescopes [ELTs]. Each system will provide a specific performance, achievable FoV, sky coverage, etc... Simulating such kind of systems is, however, one of the main issue to be addressed, especially in term of computation time. In this paper, we present a Phase Spectrum Density [PSD] simulation tool which can provide fast but realistic PSFs for performance evaluation. All the configurations specific to WFAO systems are considered including Guide Stars [GS] configuration/magnitude, profile knowledge (Cn2/layers distribution), number/altitudes of Deformable Mirrors [DM]. After a brief presentation of the theoretical basis of the method, we compare the results with a full end-to-end simulation code. Then, we illustrate the capabilities of this tool with a comparative study of the expected performance of the different WFAO systems planned for the E-ELT. We investigate the expected correction provided by a an MCAO, GLAO and MOAO systems, working with either 4 or 9 Guide Stars [GSs].

Paper Details

Date Published: 17 July 2008
PDF: 12 pages
Proc. SPIE 7015, Adaptive Optics Systems, 701573 (17 July 2008); doi: 10.1117/12.787853
Show Author Affiliations
B. Neichel, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
T. Fusco, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
J.-M. Conan, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
C. Petit, ONERA (France)
Groupement d'Intérêt Scientifique PHASE (France)
G. Rousset, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Groupement d'Intérêt Scientifique PHASE (France)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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