EAS Publications Series
Volume 22, 2006Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling and Data Processing
|Page(s)||351 - 366|
|Published online||13 October 2006|
M. Carbillet, A. Ferrari and C. Aime (eds)
EAS Publications Series, 22 (2006) 351-366
Fourier optics: imaging with diluted apertures
UMR 6525 Laboratoire Universitaire d'Astrophysique de Nice, University of Nice Sophia-Antipolis,
06108 Nice Cedex 2, France
We describe in this communication the principle of imaging with diluted apertures from the theoretical point of view of Fourier optics, for a noiseless experiment using perfect telescopes in space. Two extreme cases are considered, corresponding to dense and sparse arrays. Dense arrays make it possible to obtain a complete spatial frequency coverage; after signal processing, the images are comparable to those obtained with a very large monolithic aperture. Such a perfect frequency coverage cannot be obtained with parse arrays for which the distances between telescopes are very large compared to their size. These arrays can only sample the Fourier plane at point-like individual frequencies, with the drawback of a field limitation. Sparse arrays have however the most promising perspectives for imagery of stars and exoplanets surfaces.
© EAS, EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.