Symmetric nulling coronagraph based on a rotational shearing interferometer

We describe a fully symmetric nulling coronagraph for single-aperture telescopes that is based on a rotational shearing interferometer (RSI) and that is intended for the imaging of faint companions to nearby bright stars. In the proposed layout, all asymmetries inherent in previous single-aperture R...

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Bibliographic Details
Published in:Applied optics (2004) 2005-11, Vol.44 (33), p.7070-7073
Main Authors: Ren, Deqing, Serabyn, Eugene
Format: Article
Language:English
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Summary:We describe a fully symmetric nulling coronagraph for single-aperture telescopes that is based on a rotational shearing interferometer (RSI) and that is intended for the imaging of faint companions to nearby bright stars. In the proposed layout, all asymmetries inherent in previous single-aperture RSI-based nulling coronagraphs have been eliminated, and the bright and dark outputs are both accessible. As a resulty deep, broadband, dual-polarization rejection of on-axis starlight should be possible with this system.
ISSN:1559-128X
DOI:10.1364/AO.44.007070