Numerically designed phase-mask for stellar coronagraph | Zendy

Naoshi Baba | Zendy; Naoshi Murakami | Zendy; Noriaki Miura | Zendy; Yoichi Tamura | Zendy

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Numerically designed phase-mask for stellar coronagraph

Author(s) -

Naoshi Baba,

Naoshi Murakami,

Noriaki Miura,

Yoichi Tamura

Publication year - 2015

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.2186498

Subject(s) - coronagraph , exoplanet , phase (matter) , optics , physics , exit pupil , aperture (computer memory) , power (physics) , computer science , pupil , planet , astronomy , quantum mechanics , acoustics

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.Conference Title : Techniques and Instrumentation for Detection of Exoplanets VIIConference Chair : Stuart ShaklanPlace : San Diego, California, United StatesDate : August 09, 201

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