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Proceedings Paper

Chromatic phase diversity for cophasing large array of telescopes
Author(s): Denis Mourard; Anthony Meilland; Wassila Dali-Ali; Jean-Michel Clausse; Paul Girard; François Hénault; Aurélie Marcotto; Nicolas Mauclert; Fabien Patru; Nassima Tarmoul
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Paper Abstract

This paper reviews the recent laboratory results we have obtained on the demonstration of a cophasing algorithm based on the chromatic phase diversity method. The SIRIUS testbed was initially dedicated to the demonstration of the direct imaging capabilities of arrays of telescope. We have developed and numerically modeled a piston sensor based on the chromatic dependance of the spectral density phase. This method allows a global cophasing of the array over a capture range of many wavelengths aiming at improving the robustness of the method.

Paper Details

Date Published: 12 September 2012
PDF: 10 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84451M (12 September 2012); doi: 10.1117/12.925193
Show Author Affiliations
Denis Mourard, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Anthony Meilland, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Wassila Dali-Ali, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Jean-Michel Clausse, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Paul Girard, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
François Hénault, Institut de Planétologie et d'Astrophysique de Grenoble (France)
Aurélie Marcotto, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Nicolas Mauclert, Lab. Lagrange, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur (France)
Fabien Patru, European Southern Observatory (Chile)
Nassima Tarmoul, LATMOS (France)


Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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