Stellar coronagraphy with a redundant array of telescopes in space: The multiple mask coronagraph

Citation
C. Aime et al., Stellar coronagraphy with a redundant array of telescopes in space: The multiple mask coronagraph, ASTRON ASTR, 370(2), 2001, pp. 680-688
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
370
Issue
2
Year of publication
2001
Pages
680 - 688
Database
ISI
SICI code
0004-6361(200105)370:2<680:SCWARA>2.0.ZU;2-A
Abstract
We describe a coronagraphic technique that can be used with an array of tel escopes in space. It generalizes the use of Lyot's Masks and Roddier & Rodd ier's Phase Masks (Roddier & Roddier 1997) to an array of telescopes withou t the densification of the pupil recently proposed by Labeyrie et al. (1999 ) and Guyon & Roddier (1999, 2000). The proposed method consists of using a n ensemble of masks set on the principal diffraction peaks of the point spr ead function. The best efficiency is obtained for a redundant configuration of the apertures. A linear array configuration is proposed for solving the problems of chromatism associated with phase mask coronagraphy and permits image reconstruction via tomographic techniques. A numerical simulation is made for a one-dimensional array of telescopes.