Multi-rate control of high-order adaptive optics systems

Carlos Correia; Enrico Fedrigo; M. Le Louarn; C. Verinaud; V. Korkiakoski

doi:10.1117/12.672236

28 June 2006 Multi-rate control of high-order adaptive optics systems

Carlos Correia, Enrico Fedrigo, M. Le Louarn, C. Verinaud, V. Korkiakoski

Proceedings Volume 6272, Advances in Adaptive Optics II; 62722R (2006) https://doi.org/10.1117/12.672236
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Carlos Correia, Enrico Fedrigo, M. Le Louarn, C. Verinaud, and V. Korkiakoski "Multi-rate control of high-order adaptive optics systems", Proc. SPIE 6272, Advances in Adaptive Optics II, 62722R (28 June 2006); https://doi.org/10.1117/12.672236

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