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

Jason Kay; Tyler D. Groff; N. Jeremy Kasdin

doi:10.1117/12.826177

19 August 2009 Two-camera wavefront estimation with a Gercheberg-Saxton based scheme

Jason Kay, Tyler D. Groff, N. Jeremy Kasdin

Proceedings Volume 7440, Techniques and Instrumentation for Detection of Exoplanets IV; 74400C (2009) https://doi.org/10.1117/12.826177
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

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.

Citation Download Citation

Jason Kay, Tyler D. Groff, and N. Jeremy Kasdin "Two-camera wavefront estimation with a Gercheberg-Saxton based scheme", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400C (19 August 2009); https://doi.org/10.1117/12.826177

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