2020
DOI: 10.48550/arxiv.2012.04779
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Spectroscopic fourth-order coronagraph for the characterization of terrestrial planets at small angular separations from host stars

Taro Matsuo,
Satoshi Itoh,
Yuji Ikeda

Abstract: We propose a new approach for high-contrast imaging at the diffraction limit using segmented telescopes in a modest observation bandwidth. This concept, named "spectroscopic fourth-order coronagraphy", is based on a fourth-order coronagraph with a focal-plane mask that modulates the complex amplitude of the Airy disk along one direction. While coronagraphs applying the complex amplitude mask can achieve the theoretical limit performance for any arbitrary pupils, the focal plane mask severely limits the bandwid… Show more

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