Combining up to eight telescope beams in a single chip

Jean-Philippe Berger; Pierre Benech; Isabelle Schanen-Duport; Ghislaine Maury; Fabien Malbet; Francois Reynaud

doi:10.1117/12.390177

5 July 2000 Combining up to eight telescope beams in a single chip

Jean-Philippe Berger, Pierre Benech, Isabelle Schanen-Duport, Ghislaine Maury, Fabien Malbet, Francois Reynaud

Proceedings Volume 4006, Interferometry in Optical Astronomy; (2000) https://doi.org/10.1117/12.390177
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

In this paper we show that integrated optics offer a very simple and low cost way to combine up to eight beams of an interferometric optical array. These beam combiners will allow accurate visibilities and phase closure terms measurements, and provide consequently, high quality information for astronomical image reconstruction. We present optical designs for two different chips. Using previous laboratory experiments we extrapolate the performances, constraints and limits of different beam combination concepts. In particular spatial encoding and temporal encoding of `all-in-one' schemes are compared and their main properties are evaluated.

Citation Download Citation

Jean-Philippe Berger, Pierre Benech, Isabelle Schanen-Duport, Ghislaine Maury, Fabien Malbet, and Francois Reynaud "Combining up to eight telescope beams in a single chip", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); https://doi.org/10.1117/12.390177

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