Two-camera wavefront estimation with a Gercheberg-Saxton based scheme

Details Two-camera wavefront estimation with a Gercheberg-Saxton based scheme Two-camera wavefront estimation with a Gercheberg-Saxton based scheme

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7440e..10k&link_type=abstract

Techniques and Instrumentation for Detection of Exoplanets IV. Edited by Shaklan, Stuart B. Proceedings of the SPIE, Volume 744

Physics

Scientific paper

Most mature wavefront-estimation algorithms for high-contrast imaging rely on a-priori knowledge of the deformable mirror (DM) surface and thus are limited by uncertainty in the physics of the DM. In this paper, we review the DM diversity wavefront estimation algorithm and introduce a DM-independent method of wavefront estimation that utilizes two cameras and a Gerchberg-Saxton-based iterative phase retrieval scheme. We compare the two estimation algorithms, and we present the creation of a dark hole in the image plane using the Stroke Minimization correction algorithm and this two-camera estimation.

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