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Proceedings Paper

Prototyping coronagraphs for exoplanet characterization with SPHERE
Author(s): Anthony Boccaletti; Lyu Abe; Jacques Baudrand; Jean-Baptiste Daban; Richard Douet; Geraldine Guerri; Sylvie Robbe-Dubois; Philippe Bendjoya; Kjetil Dohlen; Dimitri Mawet
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Paper Abstract

The detection and characterization of extrasolar planets with SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) is challenging and in particular relies on the ability of a coronagraph to attenuate the diffracted starlight. SPHERE includes 3 instruments, 2 of which can be operated simultaneously in the near IR from 0.95 to 1.8 microns. This requirements is extremely critical for coronagraphy. This paper briefly introduces the concepts of 2 coronagraphs, the Half-Wave Plate Four Quadrant Phase Masks and the Apodized Pupil Lyot Coronagraph, prototyped within the SPHERE consortium by LESIA (Observatory of Paris) and FIZEAU (University of Nice) respectively. Then, we present the measurements of contrast and sensitivity analysis. The comparison with technical specifications allows to validate the technology for manufacturing these coronagraphs.

Paper Details

Date Published: 7 July 2008
PDF: 10 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70151B (7 July 2008); doi: 10.1117/12.789341
Show Author Affiliations
Anthony Boccaletti, LESIA, Observatoire de Paris (France)
Lyu Abe, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Jacques Baudrand, LESIA, Observatoire de Paris (France)
Jean-Baptiste Daban, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Richard Douet, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Geraldine Guerri, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Sylvie Robbe-Dubois, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Philippe Bendjoya, FIZEAU, Univ. de Nice-Sophia Antipolis (France)
Kjetil Dohlen, LAM, Observatoire de Marseille-Provence (France)
Dimitri Mawet, Jet Propulsion Lab. (United States)

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

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