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Proceedings Paper

Modelization of a pyramid wavefront sensor for the E-ELT in the context of the COMPASS project
Author(s): Alexis Carlotti; Christophe Vérinaud; Damien Gratadour; Mathieu Westphal; Jean-Luc Beuzit
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Paper Abstract

The COMputing Platform for Adaptive optics SystemS (COMPASS) will be used to perform end-to-end simulations of the AO system of the E-ELT. COMPASS will perform massively parallel computations using GPUs as accelerators. The completed project will involve several different aspects. In this paper we present the modelization of a pyramid wavefront sensor (P-WFS). This sensor offers an increased sensitivity compared to the Shack-Hartmann wavefront sensor, and a time-varying phase modulation increases the dynamic range of the P-WFS. This makes it a particularly interesting choice for an extreme adaptive optics system, such as the one that will be used with the planetary camera and spectrograph (PCS) instrument dedicated to exoplanet characterization with the E-ELT. We review previous P-WFS models, and in addition to describing its current implementation in COMPASS, we give a first look at the P-WFS expected performance in the presence of realistic optical aberrations.

Paper Details

Date Published: 22 August 2014
PDF: 9 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91486R (22 August 2014); doi: 10.1117/12.2056782
Show Author Affiliations
Alexis Carlotti, IPAG, CNRS, Univ. Joseph Fourier (France)
Christophe Vérinaud, IPAG, CNRS, Univ. Joseph Fourier (France)
Damien Gratadour, LESIA, CNRS, Observatoire de Paris (France)
Mathieu Westphal, IPAG, CNRS, Univ. Joseph Fourier (France)
Jean-Luc Beuzit, IPAG, CNRS, Univ. Joseph Fourier (France)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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