Chromatic phase diversity for cophasing large array of telescopes

Denis Mourard; Anthony Meilland; Wassila Dali-Ali; Jean-Michel Clausse; Paul Girard; François Hénault; Aurélie Marcotto; Nicolas Mauclert; Fabien Patru; Nassima Tarmoul

doi:10.1117/12.925193

12 September 2012 Chromatic phase diversity for cophasing large array of telescopes

Denis Mourard, Anthony Meilland, Wassila Dali-Ali, Jean-Michel Clausse, Paul Girard, François Hénault, Aurélie Marcotto, Nicolas Mauclert, Fabien Patru, Nassima Tarmoul

Author Affiliations +

Proceedings Volume 8445, Optical and Infrared Interferometry III; 84451M (2012) https://doi.org/10.1117/12.925193
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

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Denis Mourard, Anthony Meilland, Wassila Dali-Ali, Jean-Michel Clausse, Paul Girard, François Hénault, Aurélie Marcotto, Nicolas Mauclert, Fabien Patru, and Nassima Tarmoul "Chromatic phase diversity for cophasing large array of telescopes", Proc. SPIE 8445, Optical and Infrared Interferometry III, 84451M (12 September 2012); https://doi.org/10.1117/12.925193

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