High-frequency folding and optimal phase conjugation for high-contrast adaptive optics

Amir Give'on; N. Jeremy Kasdin; Robert J. Vanderbei; Yoav Avitzour

doi:10.1117/12.551576

25 October 2004 High-frequency folding and optimal phase conjugation for high-contrast adaptive optics

Amir Give'on, N. Jeremy Kasdin, Robert J. Vanderbei, Yoav Avitzour

Proceedings Volume 5490, Advancements in Adaptive Optics; (2004) https://doi.org/10.1117/12.551576
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

Conventional adaptive optics methods use phase conjugation based on measurements of the phase aberrations at the pupil plane. The measurements are typically done using a Shack-Hartmann sensor sampling at spatial frequencies determined by the spatial frequency limitations of the deformable mirror. The work presented here shows that the nulling needed for high contrast imaging cannot be achieved using such a methodology. Linear combinations of high frequencies in the aberration at the pupil plane "fold" and appear as low frequency aberrations at the image plane. We present an optimized solution for the shape of the deformable mirror based on the Fourier decomposition of the effective phase aberration.

Citation Download Citation

Amir Give'on, N. Jeremy Kasdin, Robert J. Vanderbei, and Yoav Avitzour "High-frequency folding and optimal phase conjugation for high-contrast adaptive optics", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); https://doi.org/10.1117/12.551576

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