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Proceedings Paper

Application of adaptive optics to the GI2T/REGAIN interferometer
Author(s): Christophe Verinaud; Alain Blazit; Denis Mourard
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Paper Abstract

The GI2T is a multi-speckle Michelson stellar interferometer of two 1.5 m telescopes operating in the visible and near infrared wavelengths. The REGAIN project (REcombinateur du GrAnd INterferometre) which consists of the renewal of the whole instrument is now nearly completed and the next step of the developments on GI2T will be the implantation of adaptive optics systems in each interferometric arm. In this paper we show that the data reduction methods of speckle interferometry that have been applied to the GI2T under pure turbulence, are also valid when the images are partially corrected by adaptive optics. Some simulation results show the expected performances in terms of signal-to-noise ratio for typical observation conditions. We also tackle the problem of piston control by a bimorph deformable mirror. The last section presents instrumental aspects of the foreseen AO system and the current status of the integration of the first wavefront sensor.

Paper Details

Date Published: 7 July 2000
PDF: 12 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390392
Show Author Affiliations
Christophe Verinaud, Observatoire de la Cote d'Azur (Italy)
Alain Blazit, Observatoire de la Cote d'Azur (France)
Denis Mourard, Observatoire de la Cote d'Azur (France)


Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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