Improvement of Shack-Hartmann wave-front sensor measurement for extreme adaptive optics.
The development of high-performance adaptive optics systems requires the optimization of wave-front sensors (WFSs) working in the high-order correction regime. We propose a new method to improve the wave-front slope estimation of a Shack-Hartmann WFS in such a regime. Based on a detailed analysis of the different errors in the slope estimation with a classical centroid and with the new method, the gain in terms of wave-front-sensing accuracy in both the detector and the photon noise regimes is stressed. This improvement is proposed without major system disruption.
Nicolle
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Département d'Optique Théorique et Appliquée--Office National d'Etudes de Recherche Aérospatiale, 29 Avenue de la Division Leclerc, 92322 Châtillon Cedex, France. magali.nicolle@onera.fr
Fusco
T
T
Rousset
G
G
Michau
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