Experimental comparison of tomographic control schemes using the ONERA WFAO facility

Amélie Parisot; Cyril Petit; Thierry Fusco; Jean-Marc Conan

doi:10.1117/12.926309

13 September 2012 Experimental comparison of tomographic control schemes using the ONERA WFAO facility

Amélie Parisot, Cyril Petit, Thierry Fusco, Jean-Marc Conan

Proceedings Volume 8447, Adaptive Optics Systems III; 84471V (2012) https://doi.org/10.1117/12.926309
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

Wide Field Adaptive Optics (WFAO) concepts, such as Ground Layer AO (GLAO), Laser Tomography AO (LTAO) or Multi-Conjugate AO (MCAO) are currently under study in the perspective of future ELT instruments. In that context, the experimental validation of the various smart control solutions proposed by several teams in the past years is now essential. In this paper we present experimental validation and comparison of different control laws for LTAO concept from the simplest least-square to the optimal Linear Quadratic Gaussian solutions including Virtual DeformableMirror and Pseudo-closed loop approaches. This study is performed using the Onera WFAO facility (HOMER bench). The four control laws are tested and compared in terms of performance and robustness. In particular, low and high noise conditions are explored, for several different fields of views. We also highlight their experimental optimization by the tuning of parameters in control laws.

Citation Download Citation

Amélie Parisot, Cyril Petit, Thierry Fusco, and Jean-Marc Conan "Experimental comparison of tomographic control schemes using the ONERA WFAO facility", Proc. SPIE 8447, Adaptive Optics Systems III, 84471V (13 September 2012); https://doi.org/10.1117/12.926309

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