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Optical Engineering

Polarization effects in stellar interferometry
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Paper Abstract

We develop a general formalism for describing the polarization effects in stellar interferometers. We show that celestial field rotation and phase delays between the s and p fringe patterns are first order effects. Experiments in laboratory partially check our modeling and thanks to these measurements we optimize a field rotator to compensate the visibility losses due to celestial field rotation. Then we predict the visibility functions of the Grand Interférométre á 2 Télescopes (GI2T) of the Observatoire de la Cóte d’Azur with its present beam combiner and with the future Recombinateur pour Grand Interférométre (REGAIN): the field rotator enables an increase in the observation time by more than 3 hours. Finally, we compare our results to observations done with the GI2T and we emphasize the importance of such calibrations with a polarimetric mode whose principle is validated.

Paper Details

Date Published: 1 October 1996
PDF: 13 pages
Opt. Eng. 35(10) doi: 10.1117/1.600978
Published in: Optical Engineering Volume 35, Issue 10
Show Author Affiliations
Karine Perraut-Rousselet, CNRS (France)
Farrokh Vakili, Observatoire de la Cote d'Azur (France)
Denis Mourard, Observatoire de la Cote d'Azur (France)

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