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Proceedings Paper

Multi-rate control of high-order adaptive optics systems
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Paper Abstract

Next generation adaptive-optics systems (AO) have unprecedented complexity. The proposed number of degrees-of-freedom has considerably increased, putting the focus on the real-time processing capabilities. Second generation instrumentation for the Very-Large Telescope (VLT) is one such case. We present a method capable of lowering the average computational effort (i.e. lowering the average frame-rate) and deliver the same performance figures. It consists of applying a distributed set of update rates to outperform the conventional vector-matrix multiplies (VMM) used for modal reconstruction and control in AO systems when Zernike polynomials or Karhunen-Loeve modes are used as basis. We analyse the low and high-noise regimes for which we outline the theoretical key points and present both semi-analytical and Monte-Carlo simulation results having the Planet-Finder (PF) as baseline system.

Paper Details

Date Published: 28 June 2006
PDF: 12 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62722R (28 June 2006); doi: 10.1117/12.672236
Show Author Affiliations
Carlos Correia, European Southern Observatory (Germany)
Enrico Fedrigo, European Southern Observatory (Germany)
M. Le Louarn, European Southern Observatory (Germany)
C. Verinaud, European Southern Observatory (Germany)
V. Korkiakoski, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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