Field-resolution ratio progresses for interferometric arrays

Laurent Koechlin; Denis Serre; Paul Duchon

doi:10.1117/12.551234

20 October 2004 Field-resolution ratio progresses for interferometric arrays

Laurent Koechlin, Denis Serre, Paul Duchon

Proceedings Volume 5491, New Frontiers in Stellar Interferometry; (2004) https://doi.org/10.1117/12.551234
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

This paper presents progress made regarding the field to resolution ratio for aperture synthesis interferometers. In order to overcome a limit established for the field to resolution ratio of interferometric arrays, we propose an interferometer configuration which allows a better coverage of the spatial frequency plane. This setup requires large sub-apertures, which can be built more easily with a diffractive Fresnel plates than with large mirrors. We compare a dense array of 9 Fresnel sub-apertures, which gives a snapshot field-resolution ratio of 400, versus a sparse array of 150 small apertures, which yields a field-resolution ratio of 150.

Citation Download Citation

Laurent Koechlin, Denis Serre, and Paul Duchon "Field-resolution ratio progresses for interferometric arrays", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); https://doi.org/10.1117/12.551234

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