Pyramid wave-front sensing with a laser guide star for an ELT
Laboratoire d’Astrophysique de Marseille. Observatoire Astronomique de Marseille
Provence. Université de Provence
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We present a study of the behaviour and performance of the pyramid WFS when the guide star is a laser GS on an ELT. Several aspects of a laser based wave front sensing are considered, as the fact that the considered object is extended, but also the consequences of the width of the sodium layer on a pyramid measurement. Simulation results are presented.
© Owned by the authors, published by EDP Sciences, 2010