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Proceedings Paper

Extreme adaptive optics system optimization with the high order test bench
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Paper Abstract

Extreme adaptive optics systems dedicated to the search for extrasolar planets are currently being developed for most 8-10 meter telescopes. Extensive computer simulations have shown the ability of both Shack-Hartmann and pyramid wave front sensors to deliver high Strehl ratio correction expected from extreme adaptive optics but few experiments have been realized so far. The high order test bench implements extreme adaptive optics on the MACAO test bench with realistic telescope conditions reproduced by star and turbulence generators. A 32×32 actuator micro deformable mirror, one pyramid wave front sensor, one Shack-Hartmann wave front sensor, the ESO SPARTA real time computer and an essentially read-noise free electron multiplying CCD60 (E2V CCD60) provide an ideal cocoon to study the different behavior of the two types of wave front sensors in terms of linearity, sensitivity to calibration errors, noise propagation, specific issues to pyramid or Shack-Hartmann wave front sensors, etc. We will describe the overall design of this test bench and will focus on the characterization of two essential sub-systems: the micro deformable mirror and the phase screens.

Paper Details

Date Published: 28 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62722K (28 June 2006); doi: 10.1117/12.670183
Show Author Affiliations
Elise Vernet, European Southern Observatory (Germany)
Markus Kasper, European Southern Observatory (Germany)
Christophe Vérinaud, European Southern Observatory (Germany)
Enrico Fedrigo, European Southern Observatory (Germany)
Sébastien Tordo, European Southern Observatory (Germany)
Norbert Hubin, European Southern Observatory (Germany)
Simone Esposito, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Enrico Pinna, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Alfio Puglisi, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Andrea Tozzi, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Alastair G. Basden, Durham Univ. (United Kingdom)
Stephen J. Goodsell, Durham Univ. (United Kingdom)
Gordon D. Love, Durham Univ. (United Kingdom)
Richard M. Myers, Durham Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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