Direct Imaging in Interferometry : Technical Aspects and Preliminary Results of a Fibered Pupil Densifier

F. Patru , D. Mourad , Laurent Delage (1) , François Reynaud (1) , J.M. Clausse , D. Bonneau , M. Dubreuil , A. Roussel , Y. Hugues , S. Bosio , Y. Bresson , O. Lardiere.

1 PHOTONIQUE

We present a test bench designed to study the performances of interferometric recombination systems, mainly for direct imaging applications (hypertelescope principle). It aims at comparing the aperture synthesis, Fizeau and densified pupils beam combination schemes. It allows identification of the technical requirements like photometry and cophasing correction of the future imaging recombiners for large arrays. A densified assembly has been designed in the visible wavelengths, using a multi-apertures mask associated with a wavefront sensor. It allows pupil rearrangement and spatial filtering by using single mode fibers. The technical specifications and the conception of the fiber densifier are described here, with a particular attention to the correction of the differential chromatic dispersion.

F. Patru, D. Mourad, Laurent Delage, François Reynaud, J.M. Clausse, et al.. Direct Imaging in Interferometry : Technical Aspects and Preliminary Results of a Fibered Pupil Densifier. SPIE Astronomical Telescopes and Instrumentation, May 2006, Orlando-Floride, United States. pp.62681S, ⟨10.1117/12.671555⟩. ⟨hal-00128548⟩