Simulations of high-order curvature adaptive optics

Olivier Lai; Thomas V. Craven-Bartle

doi:10.1117/12.457652

3 March 2003 Simulations of high-order curvature adaptive optics

Proceedings Volume 4860, High-Contrast Imaging for Exo-Planet Detection; (2003) https://doi.org/10.1117/12.457652
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

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.

Citation Download Citation

Olivier Lai and Thomas V. Craven-Bartle "Simulations of high-order curvature adaptive optics", Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, (3 March 2003); https://doi.org/10.1117/12.457652

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