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Open Access Publications from the University of California

Scholarly Works (2 results)

  • Article
  • Peer Reviewed
Adaptive Optics for Extremely Large Telescopes 4 – Conference Proceedings, Volume 1, Issue 1 (2015)
Raven is a Multi-Object Adaptive Optics science demonstrator which has been used on-sky at Subaru telescope from May 2014 to July 2015. Raven has been developed at the University of Victoria AO Lab, in partnership with NRC, NAOJ and Tohoku University. Raven includes three open loop WFSs, a central laser guide star WFS, and two science pick-off arms feeding light to the Subaru IRCS spectrograph. Raven supports different AO modes: SCAO, open-loop GLAO and MOAO. This paper gives an overview of the instrument design, compares the on-sky performance of the different AO modes and presents some of the science results achieved with MOAO.
    Cover page: On-sky results of Raven, a MOAO science demonstrator at Subaru Telescope
    • Article
    • Peer Reviewed
    Adaptive Optics for Extremely Large Telescopes 4 – Conference Proceedings, Volume 1, Issue 1 (2015)

    Contemporary AO systems, such as the Multi-Object Adaptive Optics system (MOAO) RAVEN currently associated with the Subaru Telescope, can suer from signicant Non-Common Path Aberrations (NCPA). These errors ultimately aect image quality and arise from optical path dierences between the wavefront sensor (WFS) path and the science path. A typical correction of NCPA involves estimating the aberration phase and correcting the system with an oset on the deformable mirror (DM). We summarize two methods used to correct for NCPA on an experimental bench. We also successfully calibrate the NCPA on RAVEN using one of these methods. Finally, we report on some rst science results with RAVEN, obtained after NCPA correction.

     

      Cover page: Calibrating the Non-Common Path Aberrations on the MOAO system RAVEN and
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