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Proceedings Paper

Multiconjugate adaptive optics: comparison of phase reconstruction approaches for large field of view
Author(s): Thierry Fusco; Jean-Marc Conan; Vincent Michau; Gerard Rousset; F. Assemat
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Paper Abstract

We present, in this article, an analytical study of the phase reconstruction error for MCAO systems. Two approaches are considered; a classical estimator based on a Least Square (LS) approach and a Maximum A Posteriori (MAP) estimator which uses the prior knowledge we have both on the measurement noise and the turbulence volume statistics. The effects of these modes both on the phase reconstruction and on the phase correction error are studied and quantified. T is shown that, using a MAP approach, a large part of the unseen modes can be extrapolated using correlations between unseen eigenmode coefficients and well-measured coefficients. We observe that the use of a MAP estimator allows a significant gain in terms of correction quality in the whole field of view.

Paper Details

Date Published: 31 January 2001
PDF: 12 pages
Proc. SPIE 4167, Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing, (31 January 2001); doi: 10.1117/12.413820
Show Author Affiliations
Thierry Fusco, ONERA (France)
Jean-Marc Conan, ONERA (France)
Vincent Michau, ONERA (France)
Gerard Rousset, ONERA (France)
F. Assemat, ONERA (France)

Published in SPIE Proceedings Vol. 4167:
Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing
John D. Gonglewski; Gary W. Kamerman; Anton Kohnle; Ulrich Schreiber; Christian Werner, Editor(s)

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