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Prolate apodized coronagraphy: numerical simulations for circular apertures

Published online by Cambridge University Press:  28 May 2003

Claude Aime ,
Rémi Soummer ,
R. Soummer ,
C. Aime  and
P. E. Falloon
R. Soummer
Affiliation:
UMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
C. Aime
Affiliation:
UMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
P. E. Falloon
Affiliation:
School of Physics, The University of Western Australia, Crawley, WA 6009, Australia
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Abstract

The formalism for the prolate apodized coronagraphs is shortly outlined. A presentation of the numerical computation of the circular prolate apodization is given, and a comparison is made between the exact prolate and the solution obtained by Guyon & Roddier (2000), with an iterative algorithm. The agreement is excellent between the two solutions, provided a sufficient sampling of the mask. Numerical simulations are presented for circular apertures with prolate apodizations and compared to the classical unapodized technique: off-axis response, effect of mask size, central obscuration and chromatism.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 8: Astronomy with High Contrast Imaging , 2003 , pp. 93 - 105
Copyright
© EAS, EDP Sciences, 2003

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