Comptes Rendus
no. 3-4
An introduction to stellar coronagraphy
[Introduction à la coronographie stellaire]
André Ferrari1  ; Rémi Soummer2  ; Claude Aime1
1 LUAN, université de Nice Sophia-Antipolis, parc Valrose, 06108 Nice cedex 2, France
2 American Museum of Natural History, 79th St. at Central Park West, New York, NY 10024, USA
Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 277-287.

Cet article propose une présentation simplifiée et originale des divers coronographes issus du coronographe de Lyot. Le coronographe de Lyot et celui de Roddier à masque de phase sont d'abord présentés. Leurs comportement est étudié en fonction de la taille du masque focal. Il est ainsi mis en évidence que le coronographe de Roddier peut agir comme un apodiseur pour l'étoile. On montre ensuite qu'une coronographie ayant des propriétées optimale peut être obtenue avec une taille de masque finie en apodisant la pupille par une fonction prolate ou avec un masque de transmission variable mais de taille infinie.

This article gives a simple and original presentation of various coronagraphs inherited from the Lyot coronagraph. We first present the Lyot and Roddier phase mask coronagraphs and study their properties as a function of the focal mask size. We show that the Roddier phase mask can be used to produce an apodization for the star. Optimal coronagraphy can be obtained from two main approaches, using prolate spheroidal pupil apodization and a finite-size focal mask, or using a clear aperture and an infinite mask of variable transmission.

Publié le :
DOI : 10.1016/j.crhy.2007.05.008
Keywords: Coronagraphy, Exoplanets
Mot clés : Coronagraphie, Exoplanètes
André Ferrari 1 ; Rémi Soummer 2 ; Claude Aime 1

1 LUAN, université de Nice Sophia-Antipolis, parc Valrose, 06108 Nice cedex 2, France
2 American Museum of Natural History, 79th St. at Central Park West, New York, NY 10024, USA 
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André Ferrari; Rémi Soummer; Claude Aime. An introduction to stellar coronagraphy. Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 277-287. doi : 10.1016/j.crhy.2007.05.008. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.05.008/

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