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Proceedings Paper

Very low noise Shack-Hartmann wavefront sensor for adaptive optics in the near-IR
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Paper Abstract

Near-Infrared wave front sensing allows to enhance sky coverage with adaptive optics. The recently developed HgCdTe avalanche photodiode arrays are promising, but still present an unperfect cosmetic. After the fine characterization of such a HgCdTe array, we propose a statistical model of the pixel response. Assuming the cosmetic is partially corrected, we simulate the impact of the residual error on a Shack-Hartmann wavefront sensor measurement. The study shows the operability of such a real time correction, and of the HgCdTe APD array characterized in this framework: the RAPID camera.

Paper Details

Date Published: 21 July 2014
PDF: 13 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91481A (21 July 2014); doi: 10.1117/12.2057712
Show Author Affiliations
Silvère Gousset, ONERA (France)
Clélia Robert, ONERA (France)
Thierry Fusco, ONERA (France)
Lab. d'Astrophysique de Marseille, CNRS, Univ. d'Aix-Marseille (France)
Vincent Michau, ONERA (France)
Cyril Petit, ONERA (France)
Sophie Derelle, ONERA (France)
Joel Deschamps, ONERA (France)
Philippe Feautrier, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
Eric Stadler, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
Eric D. de Borniol, MINATEC (France)
Johan Rothman, MINATEC (France)
Jérôme Coussement, SOFRADIR (France)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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