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Proceedings Paper

Fresnel diffraction in an interferometer: application to MATISSE
Author(s): S. Robbe-Dubois; Y. Bresson; E. Aristidi; S. Lagarde; P. Antonelli; B. Lopez; R. G. Petrov
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Paper Abstract

While doing optical study in an instrument similar to the interferometers dedicated to the Very Large Telescope (VLT), we have to take care of the pupil and focus conjugations. Modules with artificial sources are designed to simulate the stellar beams, in terms of collimation and pupil location. They constitute alignment and calibration tools. In this paper, we present such a module in which the pupil mask is not located in a collimated beam thus introducing Fresnel diffraction. We study the instrumental contrast taking into account the spatial coherence of the source, and the pupil diffraction. The considered example is MATISSE, but this study can apply to any other instrument concerned with Fresnel diffraction.

Paper Details

Date Published: 21 July 2010
PDF: 8 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77343W (21 July 2010); doi: 10.1117/12.856389
Show Author Affiliations
S. Robbe-Dubois, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
Y. Bresson, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
E. Aristidi, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
S. Lagarde, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
P. Antonelli, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
B. Lopez, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)
R. G. Petrov, Univ. de Nice-Sophia antipolis, Observatoire de la Côte d'Azur, CNRS (France)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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