Document Astronomy with High Contrast Imaging
C. Aime and R. Soummer (eds)
EAS Publications Series, Vol. 8, 2003
DOI: 10.1051/eas:2003054
Prolate apodized coronagraphy: numerical simulations for circular apertures
R. Soummer1, C. Aime1 and P.E. Falloon21 UMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
2 School of Physics, The University of Western Australia, Crawley, WA 6009, Australia
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.
© EAS, EDP Sciences 2003