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Proceedings Paper

Post-coronagraphic wave-front sensing for the exo-planet imaging camera and spectrograph, EPICS for the European ELT
Author(s): Christophe Vérinaud; Roxane Mollard; Pierre Kern; Raphaël Galicher; Pierre Baudoz; Jean-Luc Beuzit; Gérard Rousset
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Paper Abstract

Performance of wave-front control and coronagraphy are very critical for high contrast imaging on an ELT. Quasi-static aberrations will have a dramatic impact on the detection performance for the most demanding science objectives of EPICS, the direct imaging of exo-planets. The contribution of these systematic errors will have to be significantly lower than the overall residual halo level due to turbulence correction residual after coronagraphy. We present preliminary results of the strategy to measure wave front errors after the coronagraph with the goal of minimizing common path errors for the correction of static speckles. The development of two novel post-coronagraphic wave-front sensors is given.

Paper Details

Date Published: 11 July 2008
PDF: 11 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70151W (11 July 2008); doi: 10.1117/12.789932
Show Author Affiliations
Christophe Vérinaud, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Roxane Mollard, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Pierre Kern, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Raphaël Galicher, Lab. d’Etudes Spatiales et d’Instrumentation en Astrophysique (France)
Groupement d'Intérêt Scientifique PHASE (France)
Pierre Baudoz, Lab. d’Etudes Spatiales et d’Instrumentation en Astrophysique (France)
Groupement d'Intérêt Scientifique PHASE (France)
Jean-Luc Beuzit, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Gérard Rousset, Lab. d’Etudes Spatiales et d’Instrumentation en Astrophysique (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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