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Proceedings Paper

Simulation of a cascaded adaptive optic system for high contrast imaging
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Paper Abstract

Higher contrast on images using Adaptive Optics (AO) systems is a topic on demand to be develop for high contrast imaging, especially on objects with small angular separations mixed with low entrance flux. Is for this, that a new system architecture is presented on this proceeding, where an already existing low order system (the 1st stage) is retrofitting a high order, fast system (the 2nd stage). The benefits of such a design is to minimize interventions in the hardware and software of the existing system, while increasing the number of degrees of freedom and speed of the combined system. The 1st stage is completely independent, and does not see the corrections done by the 2nd stage. We present here the analytical formulation and simulations results of such a system. First the system is described and the methodology is presented, where an analytical model was used to roughly determine system parameters for the 1st stage and 2nd stage, and then, a numerical simulation is performed using Octopus for verification.

Paper Details

Date Published: 1 August 2018
PDF: 7 pages
Proc. SPIE 10703, Adaptive Optics Systems VI, 1070363 (1 August 2018); doi: 10.1117/12.2311961
Show Author Affiliations
Nelly Cerpa Urra, European Southern Observatory (Germany)
Institut d'Optique, Univ. Paris-Saclay (France)
Markus Kasper, European Southern Observatory (Germany)
Miska Le Louarn, European Southern Observatory (Germany)
Caroline Kulcsár, Institut d'Optique, Univ. Paris-Saclay (France)
Henri-François Raynaud, Institut d'Optique, Univ. Paris-Saclay (France)

Published in SPIE Proceedings Vol. 10703:
Adaptive Optics Systems VI
Laird M. Close; Laura Schreiber; Dirk Schmidt, Editor(s)

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