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Proceedings Paper

Extreme adaptive optics coronagraphy with the high-order test bench in the context of the SPHERE instrument
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Paper Abstract

Extreme adaptive optics systems (XAO) dedicated to the search for extrasolar planets are currently being developed for 8-10 meter telescopes. The High-Order Test bench (HOT) is a high-contrast imaging adaptive optics bench developed at the European Southern Observatory to test and optimize different techniques and technologies (e.g. wavefront sensors, coronagraphs, speckle calibration methods, image post-processing). It reproduces realistic conditions at a telescope (e.g. Very Large Telescope, VLT), including a turbulence generator, a high-order adaptive optics system, a near-IR coronagraph, and sequential differential imaging modes (spectral and polarimetric). We discuss the results of XAO coronagraphy obtained in the laboratory in the context of imminent planet-finder instruments (e.g. SPHERE1, GPI2, and HiCIAO3). In particular, results obtained with HOT will be discussed and compared with contrast goals of the near-IR camera of SPHERE.

Paper Details

Date Published: 28 July 2010
PDF: 9 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361L (28 July 2010); doi: 10.1117/12.857145
Show Author Affiliations
Patrice Martinez, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Emmanuel Aller Carpentier, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Markus Kasper, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)


Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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