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Proceedings Paper

Simulations of high-order curvature adaptive optics
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Paper Abstract

CFHT recently considered an upgrade of its curvature adaptive optics system to perform high dynamic range imaging. This requires high Strehl ratios and very stable PSF, which is usually achieved with high order AO systems providing a dense sampling and correction across the pupil. Such systems are conventionally thought of as Shack-Hartman/piezostack devices because, in theory the scalign law for noise propagation goes as N.log(N) where N is the number of actuators. However, it is difficult to demonstrate this behavior in practice, and as systems get more compelx, their efficiency drops to lower levels than expected. Simulations of such systems are usually optimistic because they fail to take the complexity of a real system's flaws into account.

Paper Details

Date Published: 3 March 2003
PDF: 9 pages
Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, (3 March 2003); doi: 10.1117/12.457652
Show Author Affiliations
Olivier Lai, Canada-France-Hawaii Telescope Corp. (United States)

Published in SPIE Proceedings Vol. 4860:
High-Contrast Imaging for Exo-Planet Detection
Alfred B. Schultz; Richard G. Lyon, Editor(s)

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