28 July 2014 High-contrast imaging in wide spectral band with a self-coherent camera and achromatic coronagraphs
Author Affiliations +
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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. R. Delorme, R. Galicher, P. Baudoz, G. Rousset, J. Mazoyer, M. N'Diaye, K. Dohlen, A. Caillat, "High-contrast imaging in wide spectral band with a self-coherent camera and achromatic coronagraphs", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515Q (28 July 2014); doi: 10.1117/12.2056846; https://doi.org/10.1117/12.2056846
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT


Back to Top