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Proceedings Paper

Precise wavefront control for stellar coronagraphy: possibilities by a common-path extremely unbalanced interferometer
Author(s): Ilia Dziuban; Inna Shashkova; Pavel Frolov; Yulia Bezymyannikova; Alexander Tavrov
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Paper Abstract

We propose to use an extremely unbalanced interferometer (EUI) as a wavefront correcting input to a stellar coronagraph for direct exoplanet imaging. Since a cumulative wavefront error causes incomplete suppression of stellar light, an EUI aims to correct precisely the wavefront incident to the coronagraph to a level better than λ/5000 in the visible wavelength range. EUI does not use an extremely precise deformable mirror, it increases the accuracy of a wavefront control effectively because of the coherent summation with an amplitude imbalance. It will enable obtaining the desirable 10-9 coronagraphic (raw) contrast for Earth-like exoplanet imaging.

Paper Details

Date Published: 27 July 2016
PDF: 14 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99095B (27 July 2016); doi: 10.1117/12.2232506
Show Author Affiliations
Ilia Dziuban, Space Research Institute (Russian Federation)
Inna Shashkova, Space Research Institute (Russian Federation)
Pavel Frolov, Space Research Institute (Russian Federation)
Yulia Bezymyannikova, Moscow Institute of Physics and Technology (Russian Federation)
Alexander Tavrov, Space Research Institute (Russian Federation)
Moscow Institute of Physics and Technology (Russian Federation)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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