Multiconjugate adaptive optics: comparison of phase reconstruction approaches for large field of view

Thierry Fusco; Jean-Marc Conan; Vincent Michau; Gerard Rousset; F. Assemat

doi:10.1117/12.413820

31 January 2001 Multiconjugate adaptive optics: comparison of phase reconstruction approaches for large field of view

Thierry Fusco, Jean-Marc Conan, Vincent Michau, Gerard Rousset, F. Assemat

Proceedings Volume 4167, Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing; (2001) https://doi.org/10.1117/12.413820
Event: Europto Remote Sensing, 2000, Barcelona, Spain

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.

Citation Download Citation

Thierry Fusco, Jean-Marc Conan, Vincent Michau, Gerard Rousset, and F. Assemat "Multiconjugate adaptive optics: comparison of phase reconstruction approaches for large field of view", Proc. SPIE 4167, Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing, (31 January 2001); https://doi.org/10.1117/12.413820

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