title: Influence of the antenna diagram on a stellar interferometer that is suffering from telescope-pointing errors.
abstract: We report our experimental investigations of the influence of differential telescope-pointing errors on data corruption in an optical stellar interferometer. This effect was investigated theoretically as a function of the telescope antenna diagram, which depends on the aperture diameter. Using a laboratory breadboard consisting of a three-telescope array, we carried out the experiments with various aperture diameters and complex objects. The results matched the simulation and demonstrate that, when there is no error in pointing, a large aperture size induces correctible error but that, with a pointing error, data corruption becomes critical. In both cases, the larger the apertures, the more corrupt the data.
authors.affiliation: Equipe Optique, Institut de Recherches en Communications Optiques et Microondes, Unite Mixte de Recherche 6615, Limoges France. longuet@ircom.unilim.fr
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Longueteau
authors.forename: Laurent
authors.initials: L
authors.lastname: Delage
authors.forename: François
authors.initials: F
authors.lastname: Reynaud