Post-coronagraphic wave-front sensing for the exo-planet imaging camera and spectrograph, EPICS for the European ELT

Christophe Vérinaud; Roxane Mollard; Pierre Kern; Raphaël Galicher; Pierre Baudoz; Jean-Luc Beuzit; Gérard Rousset

doi:10.1117/12.789932

11 July 2008 Post-coronagraphic wave-front sensing for the exo-planet imaging camera and spectrograph, EPICS for the European ELT

Christophe Vérinaud, Roxane Mollard, Pierre Kern, Raphaël Galicher, Pierre Baudoz, Jean-Luc Beuzit, Gérard Rousset

Author Affiliations +

Proceedings Volume 7015, Adaptive Optics Systems; 70151W (2008) https://doi.org/10.1117/12.789932
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

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Christophe Vérinaud, Roxane Mollard, Pierre Kern, Raphaël Galicher, Pierre Baudoz, Jean-Luc Beuzit, and Gérard Rousset "Post-coronagraphic wave-front sensing for the exo-planet imaging camera and spectrograph, EPICS for the European ELT", Proc. SPIE 7015, Adaptive Optics Systems, 70151W (11 July 2008); https://doi.org/10.1117/12.789932

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