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Proceedings Paper • Open Access

Temporal hypertelescope
Author(s): F. Reynaud; L. Delage; S. Olivier

Paper Abstract

The possibility of direct imaging is a very attractive alternative if compared to the conventional coherence analysis achieved in telescope arrays like VLTI. A. Labeyrie has proposed the concept of hypertelescope with the key step of pupil densification. This proposal faces the difficulty to implement homothetic pupils and requires a complex architecture with sub micrometric accuracy to make the pupil reconfigurable. In this talk we propose a new version of hypertelescope devoted to high-resolution direct imaging. By using a temporal versus spatial opticalpath modulation in a multi-aperture interferometer, we show that the beam densification process can be similarly achieved in the time domain giving rise to a very good reconfiguration versatility. Reducing the span of optical modulations allows us to convert this instrument into a nulling interferometer. Our new experimental configuration allows an easy and versatile recombination reconfiguration for a ground or space instrument and answers the problem of the variable spatial Fourier spectrum sampling either with a groundbased observation or with a pupil reconfiguration for a space mission. First results on a demonstration breadboard are proposed and future developments are discussed.

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 1056601 (21 November 2017); doi: 10.1117/12.2308213
Show Author Affiliations
F. Reynaud, XLIM Institut de Recherche (France)
L. Delage, XLIM Institut de Recherche (France)
S. Olivier, XLIM Institut de Recherche (France)

Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

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