SIMBAD references

2000A&AS..147..285P - Astron. Astrophys., Suppl. Ser., 147, 285-290 (2000/December-1)

First images on the sky from a hyper telescope.

PEDRETTI E., LABEYRIE A., ARNOLD L., THUREAU N., LARDIERE O., BOCCALETTI A. and RIAUD P.

Abstract (from CDS):

We show star images obtained with a miniature ``densified pupil imaging interferometer'' also called a hyper-telescope. The formation of such images violates a ``golden rule of imaging interferometers'' which appeared to forbid the use of interferometric arrangements differing from a Fizeau interferometer. These produce useless images when the sub-apertures spacing is much wider than their size, owing to diffraction through the sub-apertures. The hyper-telescope arrangement solves these problems opening the way towards multi-kilometer imaging arrays in space. We experimentally obtain an intensity gain of 24±3x when a densified-pupil interferometer is compared to an equivalent Fizeau-type interferometer and show images of the double star α Gem. The initial results presented confirm the possibility of directly obtaining high resolution and high dynamic range images in the recombined focal plane of a large interferometer if enough elements are used.

Abstract Copyright:

Journal keyword(s): interferometers - double star images - laboratory images - pupil densification

Simbad objects: 2

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