Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...400..393g&link_type=abstract
Astronomy and Astrophysics, v.400, p.393-396 (2003)
Astronomy and Astrophysics
Astrophysics
9
Instrumentation: Interferometers, Techniques: High Angular Resolution, Stars: Binaries: Visual, Methods: Observational
Scientific paper
We verify the imaging performance of hypertelescopes on the sky, using a new scheme for pupil densification. To avoid seeing limitations, we used a miniature version with a 10 cm aperture containing 78 sub-apertures of 1 mm size, arrayed periodically as a square grid. The pupil densification is achieved with a pair of micro-lens arrays, where each pair of facing lenses behaves like a tiny demagnifying telescope. We have tested the direct snapshot performance with laboratory-simulated multiple stars and observed the binary star Castor (alpha Gem). We measured a separation of 3.8 arcsec and a magnitude difference of 0.85 which is in agreement with current orbital data. This verified the theoretical expectations for hypertelescopes in terms of field of view and fluxes and qualified the new optical implementation for future arrays at the scale of meters and beyond.
Arnold Luc
Boccaletti Anthony
Dejonghe Julien
Gillet Sophie
Horville David
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