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Laser-only AO, readout noise studies and AO verification and integration for ELTs

  • Author(s): Basden, Alastair
  • Morris, Tim
  • Myers, Richard
  • Dipper, Nigel
  • Gendron, Eric
  • Vidal, Fabrice
  • Sevin, Arnaud
  • Rousset, Gerard
  • Gratadour, Damien
  • Hubert, Zoltan
  • Wilson, Angus
  • Morel, Carine
  • et al.
Abstract

We present a concept for visible near-diffraction limited lucky imaging with full-sky laser assisted adaptive optics.Simulation results are given, along with first on-sky measurements taken with the CANARY AO system on theWilliam Herschel Telescope, and extension to ELT scales.We also present a study of readout noise in EMCCD and sCMOS detectors, with findings that are perhapssurprising when compared with naive models of sCMOS noise. We discuss the relative trade-offs of these detectorsfor ELT-scale AO and lucky imaging.Finally we introduce the concept of real-time simulation, necessary for integration and verification of ELT-scale AO systems, and provide details of the system developed for CANARY.

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