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Proceedings Paper

Wavefront correction in a shaped-pupil coronagraph using a Gerchberg-Saxton-based estimation scheme
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Paper Abstract

The detection of extra-solar terrestrial planets requires the use of space-based high-contrast imaging. Stellar photon noise as well as light thrown about by system aberrations necessitate the use of a high quality light suppression system and a method for wavefront correction. We present here a wavefront estimation scheme to be used with estimate-based correction for the shaped pupil coronagraph. In order to properly estimate the field in a reimaged pupil plane, we employ the use of the iterative Gerchberg-Saxton estimation algorithm between it and a second-focus image plane. We utilize the correction algorithm to overcome an ambiguity inherent in Gerchberg-Saxton estimation.

Paper Details

Date Published: 18 September 2007
PDF: 8 pages
Proc. SPIE 6691, Astronomical Adaptive Optics Systems and Applications III, 66910D (18 September 2007); doi: 10.1117/12.734610
Show Author Affiliations
Jason Kay, Princeton Univ. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
Ruslan Belikov, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 6691:
Astronomical Adaptive Optics Systems and Applications III
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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