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Proceedings Paper

End-to-end simulation of AO-assisted coronagraphic differential imaging: estimation of performance for SPHERE
Author(s): Anthony Boccaletti; Marcel Carbillet; Thierry Fusco; David Mouillet; Maud Langlois; Claire Moutou; Kjetil Dohlen
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Paper Abstract

SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch), the planet finder instrument for the VLT is designed to study relatively bright extrasolar giant planets around young or nearby stars. SPHERE is a set of three instruments fed by the same AO-system, two of them share the same coronagraph. This complex system has been modeled with Fourier Optics to investigate the performance of the whole instrument. In turns, this end-to-end model was useful to analyze the sensitivity to various parameters (WFE, alignment of the coronagraph, differential aberrations) and to put some specifications on the sub-systems. This paper presents some example of sensitivity analysis and some contrast performance of the instruments as a function of the flux for the main observing mode of SPHERE: the Dual Band Imaging (DBI), equivalent to the Spectral Differential Imaging technique.

Paper Details

Date Published: 15 July 2008
PDF: 11 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70156E (15 July 2008); doi: 10.1117/12.789349
Show Author Affiliations
Anthony Boccaletti, LESIA, Observatoire de Paris (France)
Marcel Carbillet, FIZEAU, Univ. de Nice Sophia Antipolis (France)
Thierry Fusco, ONERA-DOTA (France)
David Mouillet, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Maud Langlois, LAM, Observatoire de Marseille-Provence (France)
Claire Moutou, LAM, Observatoire de Marseille-Provence (France)
Kjetil Dohlen, LAM, Observatoire de Marseille-Provence (France)

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

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