Title:
Nulling Interferometry for the DARWIN Mission - Laboratory Demonstration Experiment
Authors:
Ollivier, M.; Léger, A.; Sekulic, C. Anceau. P.; Brunaud, J.; Artzner, G.; Mariotti, J.-M.; Michel, G.; Coudé Du Foresto, V.; Mennesson, B.; Bouchareine, P.; Lépine, T.; Malbet, F.
Affiliation:
AA(Institut d Astrophysique Spatiale - Orsay France, Marc.Ollivier@ias.fr)
Journal:
Working on the Fringe: Optical and IR Interferometry from Ground and Space. Proceedings from ASP Conference Vol. 194. Edited by Stephen Unwin and Robert Stachnik. ISBN: 1-58381-020-X (1999), p.443
Publication Date:
00/1999
Origin:
ADS
Bibliographic Code:
1999wfoi.conf..443O

Abstract

The present projects of space interferometers dedicated to the detection and analysis of extrasolar planets (DARWIN/IRSI in Europe, TPF in the United States) are based on the nulling interferometry concept (interferometrical coronography). This concept has been proposed by Bracewell in 1979 but has never been demonstrated, with high values of rejection, in the thermal infrared range where planet detection should be performed (6-18 microns). We have thus built a two-beam laboratory interferometer to validate this concept in a monochromatic case (CO2 laser). We present the principle of the experimental setup, its realisation, its sub-systems and their servo-control. We present also the first results we got with this interferometer.