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Fourier optics: imaging with diluted apertures

Published online by Cambridge University Press:  13 October 2006

M. Carbillet ,
A. Ferrari ,
C. Aime  and
C. Aime
C. Aime*
Affiliation:
UMR 6525 Laboratoire Universitaire d'Astrophysique de Nice, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
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Abstract


We describe in this communication the principle of imaging withdiluted apertures from the theoretical point of view of Fourieroptics, for a noiseless experiment using perfect telescopes inspace. Two extreme cases are considered, corresponding to denseand sparse arrays. Dense arrays make it possible to obtain acomplete spatial frequency coverage; after signal processing, theimages are comparable to those obtained with a very largemonolithic aperture. Such a perfect frequency coverage cannot beobtained with parse arrays for which the distances betweentelescopes are very large compared to their size. These arrays canonly sample the Fourier plane at point-like individualfrequencies, with the drawback of a field limitation. Sparsearrays have however the most promising perspectives for imagery ofstars and exoplanets surfaces.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 22: Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling and Data Processing , 2006 , pp. 351 - 366
Copyright
© EAS, EDP Sciences, 2006

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