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Proceedings Paper

An interferometric imaging test bench: the densified pupil concept applied to the VLTI
Author(s): Fabien Patru; Denis Mourard; Olivier Lardiere; Alain Spang; Jean-Michel Clausse; Pierre Antonelli; Yves Bresson; Stephane Lagarde
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Paper Abstract

We describe a test bench designed to study the performances of interferometric imaging systems. The main goal is to study the densified pupil concept in the framework of the VLTI. This work is linked to the proposition of a second generation instrument called VIDA (VLTI Imaging with a Densified Array). This bench aims at comparing the imaging performances of the aperture synthesis, Fizeau and densified pupils beam combination schemes and at specifying the technical requirements like cophasing and tip-tilt correction. A Fizeau assembly, using a multi-apertures mask and associated with a wavefront sensor, has been designed. It allows to measure the differential piston between sub-apertures and to link them to the characteristics of the image recovered. A densified assembly is under study by using reflective surfaces or optical fibers to carry the beams and to densify the pupils before the combination.

Paper Details

Date Published: 20 October 2004
PDF: 11 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.567527
Show Author Affiliations
Fabien Patru, Observatoire de la Cote d'Azur (France)
Denis Mourard, Observatoire de la Cote d'Azur (France)
Olivier Lardiere, Osservatorio Astrofisico di Arcetri (Italy)
Alain Spang, Observatoire de la Cote d'Azur (France)
Jean-Michel Clausse, Observatoire de la Cote d'Azur (France)
Pierre Antonelli, Observatoire de la Cote d'Azur (France)
Yves Bresson, Observatoire de la Cote d'Azur (France)
Stephane Lagarde, Observatoire de la Cote d'Azur (France)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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