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Achromatic Prolate Coronagraph using Interferometric Apodisations

Published online by Cambridge University Press:  13 October 2006

M. Carbillet ,
A. Ferrari ,
C. Aime ,
L. Pueyo ,
C. Aime ,
R. Soummer ,
A. Give On  and
N.J. Kasdin
L. Pueyo
Affiliation:
MAE Department, Princeton University, Princeton, NJ 08544, USA
C. Aime
Affiliation:
UMR 6525 Astrophysique, Université de Nice Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 2, France
R. Soummer
Affiliation:
Department of Astrophysics, American Museum of Natural History, 79th Street at Central Park West, New York, NY 10024, USA
A. Give On
Affiliation:
MAE Department, Princeton University, Princeton, NJ 08544, USA
N.J. Kasdin
Affiliation:
MAE Department, Princeton University, Princeton, NJ 08544, USA
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Abstract

Recent developments in coronagraphy have increased the reachable dynamic range limit of telescopes and thus opened the possibility for the imaging of fainter and fainter companions. They rely on a series of modifications of the original concept involving amplitude and phase masks in either the pupil or the image plane. They are designed to operate optimally at one wavelength. In this paper we first study the chromatic leakage in Pupil Apodised Lyot Coronagraphs and then present a theoretical solution that create a polychromatic null while maximizing the photon flux from the companion. Finally we discuss a promising experimental implementation of this solution using interferometric apodisations.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 22: Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling and Data Processing , 2006 , pp. 239 - 251
Copyright
© EAS, EDP Sciences, 2006

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