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Proceedings Paper

High-contrast imaging in wide spectral band with a self-coherent camera and achromatic coronagraphs
Author(s): J. R. Delorme; R. Galicher; P. Baudoz; G. Rousset; J. Mazoyer; M. N'Diaye; K. Dohlen; A. Caillat
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Paper Abstract

Direct imaging of exoplanets is very attractive but challenging. It requires high angular resolution and very high-contrast imaging. One solution is the use of coronagraphs behind the adaptive optics of large telescopes. Unfortunately, optics of space telescope and ground telescope introduce quasi-static aberrations which strongly limit the quality of the final image and a dedicated stage of adaptive optics is required. We proposed a self- coherent camera (SCC) in 2006 and we obtained contrast levels of (approximately equal to) 2 10-8 at a few λ0=D at 638 nm in laboratory. In this paper, we explain how to achromatize the SCC. We present laboratory performance in wide spectral band (approximately equal to) 5 - 10 % bandpass.

Paper Details

Date Published: 28 July 2014
PDF: 12 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515Q (28 July 2014); doi: 10.1117/12.2056846
Show Author Affiliations
J. R. Delorme, Observatoire de Paris à Meudon, CNRS, Univ. Paris 7-Denis Diderot (France)
R. Galicher, Observatoire de Paris à Meudon, CNRS, Univ. Paris 7-Denis Diderot (France)
P. Baudoz, Observatoire de Paris à Meudon, CNRS, Univ. Paris 7-Denis Diderot (France)
G. Rousset, Observatoire de Paris à Meudon, CNRS, Univ. Paris 7-Denis Diderot (France)
J. Mazoyer, Observatoire de Paris à Meudon, CNRS, Univ. Paris 7-Denis Diderot (France)
M. N'Diaye, Space Telescope Science Institute (United States)
K. Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
A. Caillat, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)


Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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