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

Wavefronts

Point spread functions

Diffraction

Interferometers

Optical components

Zone plates

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