Optimal control law for multiconjugate adaptive optics

Brice Le Roux; Jean-Marc Conan; Caroline Kulcsar; Henri-Francois Raynaud; Laurent M. Mugnier; Thierry Fusco

doi:10.1117/12.459704

7 February 2003 Optimal control law for multiconjugate adaptive optics

Brice Le Roux, Jean-Marc Conan, Caroline Kulcsar, Henri-Francois Raynaud, Laurent M. Mugnier, Thierry Fusco

Proceedings Volume 4839, Adaptive Optical System Technologies II; (2003) https://doi.org/10.1117/12.459704
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We propose in this paper an optimal closed loop control law for multiconjugate adaptive optics (MCAO), based on a Kalman filter and a feedback control. The so-called open loop optimal phase reconstruction is recalled. It is based on a Maximum A Posteriori (MAP) approach. This approach takes into account wavefront sensing noise and also makes use of a turbulence profile model and Kolmogorov statistics. We propose a closed-loop modelization via a state-space representation. A Kalman filter is used for the phase reconstruction. This approach is a closed loop generalization of the MAP open loop estimator. It uses the same spatial prior in addition with a temporal model of the turbulence. Results are compared with the Optimized Modal Gain Integrator approach in the classical adaptive optics case and in an MCAO-like case.

Citation Download Citation

Brice Le Roux, Jean-Marc Conan, Caroline Kulcsar, Henri-Francois Raynaud, Laurent M. Mugnier, and Thierry Fusco "Optimal control law for multiconjugate adaptive optics", Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); https://doi.org/10.1117/12.459704

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