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Proceedings Paper

Numerically designed phase-mask for stellar coronagraph
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Paper Abstract

Phase-mask coronagraph holds the ability to detect exoplanets very close to their parent star. We report a new kind of phase mask that performs the contrast ratio of more than the tenth power of 10 for a circular aperture with shades of a secondary mirror and spiders. The phase distribution of the phase mask is numerically obtained by making the leaked light distribute outside the transparent part of the pupil. We applied the hybrid input-output algorithm, one of phase retrieval methods, to find the phase distribution of the phase mask. We show the characteristics of thus obtained phase mask.

Paper Details

Date Published: 11 September 2015
PDF: 6 pages
Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96051V (11 September 2015); doi: 10.1117/12.2186498
Show Author Affiliations
Naoshi Baba, Hokkaido Univ. (Japan)
Muroran Institute of Technology (Japan)
Naoshi Murakami, Hokkaido Univ. (Japan)
Noriaki Miura, Kitami Institute of Technology (Japan)
Motohide Tamura, The Univ. of Tokyo (Japan)
National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 9605:
Techniques and Instrumentation for Detection of Exoplanets VII
Stuart Shaklan, Editor(s)

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