Multi-rate control of high-order adaptive optics systems

Details Multi-rate control of high-order adaptive optics systems Multi-rate control of high-order adaptive optics systems

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6272e..87c&link_type=abstract

Advances in Adaptive Optics II. Edited by Ellerbroek, Brent L.; Bonaccini Calia, Domenico. Proceedings of the SPIE, Volume 6272

Physics

Optics

Scientific paper

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.

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