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Comptes Rendus Physique
Volume 8, n° 3-4
pages 333-339 (avril 2007)
Doi : 10.1016/j.crhy.2007.03.004
Expected performance of a self-coherent camera
Étude des performances dʼune Self-Coherent Camera
 

Raphaël Galicher , Pierre Baudoz
Observatoire de Paris-Meudon, 5, place Jules-Janssen, 92195 Meudon cedex, France 

Corresponding author.
Abstract

Residual wavefront errors in optical elements limit the performance of coronagraphs. To improve their efficiency, different types of devices have been proposed to correct or calibrate these errors. In this article, we study one of these techniques proposed by Baudoz et al. (2006), and called Self-Coherent Camera (SCC). The principle of this instrument is based on the lack of coherence between the stellar light and the planet that is searched for. After recalling the principle of the SCC, we simulate its performance under realistic conditions and compare it with the performance of differential imaging. To cite this article: R. Galicher, P. Baudoz, C. R. Physique 8 (2007).

The full text of this article is available in PDF format.
Résumé

La qualité de surface des optiques limite les performances des coronographes. La correction ou lʼétalonnage de ces défauts optiques permet dʼen améliorer lʼefficacité. Nous étudions dans cet article une technique, proposée par Baudoz et al. (2006), qui permet dʼétalonner les tavelures créées au plan focal par les défauts de surface dʼonde. Le principe de cet instrument, appelé Self-Coherent Camera (SCC), est basé sur lʼabsence de cohérence entre lʼétoile et la planète. Après un rappel du principe de la SCC, nous présentons une comparaison de ses performances avec celles de lʼimagerie différentielle. Pour citer cet article : R. Galicher, P. Baudoz, C. R. Physique 8 (2007).

The full text of this article is available in PDF format.

Keywords : High contrast imaging, Exoplanet, Image processing

Mots-clés : Imagerie à haut contraste, Planète extrasolaire, Traitement des images




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