Document Astronomy with High Contrast Imaging
C. Aime and R. Soummer (eds)
EAS Publications Series, Vol. 8, 2003
DOI: 10.1051/eas:2003053
Introduction to stellar coronagraphy with entrance pupil apodization
C. Aime and R. SoummerUMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
Abstract
The general formalism for Lyot and Roddier & Roddier coronagraphy is detailed. The influence of the mask
size, chromatism and central obscuration are discussed. The necessity of entrance pupil apodization for
coronagraphy is introduced from the fundamental limitation that appears in the classical technique. Prolate
spheroidal functions are presented as the natural apodizations for coronagraphy.
© EAS, EDP Sciences 2003