A simple beam combination for stellar interferometry

Details A simple beam combination for stellar interferometry A simple beam combination for stellar interferometry

2007-02-11

arxiv.org/abs/astro-ph/0702294v1

Astronomy and Astrophysics

Astrophysics

3 pages

Scientific paper

10.1364/OL.32.001075

In stellar interferometry, image quality improves significantly with the inclusion of more telescopes and the use of phase closure. We demonstrate, using first coherent and then partially coherent white light, a compact and efficient pair-wise combination of twelve or more beams. The input beams are lined up and spread through a cylindrical lens into a comb of parallel ellipses, which interferes with a perpendicular copy of itself to form a matrix of interferograms between all pairs. The diagonal elements show interference of each beam with itself, for in-tensity calibration. The measured white-light visibilities were high and stable.

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