Current status of the laser guide star adaptive optic system for Subaru Telescope

Yutaka Hayano, Hideki Takami, Olivier Guyon, Shin Oya, Masayuki Hattori, Yoshihiko Saito, Makoto Watanabe, Naoshi Murakami, Yosuke Minowa, Meguru Ito, Stephen Colley, Michael Eldred, Taras Golota, Matthew Dinkins, Nobunari Kashikawa, Masanori Lye

Research output: Chapter in Book/Report/Conference proceedingConference contribution

53 Scopus citations

Abstract

The current status and recent results' since last SPIE conference at Orlando in 2006' for the laser guide star adaptive optics system for Subaru Telescope is presented. We had a first light using natural guide star and succeed to launch the sodium laser beam in October 2006. The achieved Strehl ratio on the 10th magnitude star was around 0.5 at K band. We confirmed that the full-width-half-maximum of the stellar point spread function is smaller than 0.1 arcsec even at the 0.9 micrometer wavelehgth. The size of the artificial guide star by the laser beam tuned at the wavelength of 589 nm was estimated to be 10 arcsec. The obtained blurred artificial guide star is caused by the wavefront error on the laser launching telescope. After the first light and first launch' we found that we need to modify and to fix the components' which are temporarily finished. Also components' which were postponed to fabricate after the first light' are required to build newly. All components used by the natural guide star adaptive optics system are finalized recently and we are ready to go on the sky. Next engineering observation is scheduled in August' 2008.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems
DOIs
StatePublished - Dec 1 2008
Externally publishedYes
EventAdaptive Optics Systems - Marseille, France
Duration: Jun 23 2008Jun 26 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7015
ISSN (Print)0277-786X

Other

OtherAdaptive Optics Systems
CountryFrance
CityMarseille
Period6/23/086/26/08

Keywords

  • Adaptive optics
  • Bimorph mirror
  • Curvature sensor
  • Laser guide star
  • Subaru Telescope

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Hayano, Y., Takami, H., Guyon, O., Oya, S., Hattori, M., Saito, Y., Watanabe, M., Murakami, N., Minowa, Y., Ito, M., Colley, S., Eldred, M., Golota, T., Dinkins, M., Kashikawa, N., & Lye, M. (2008). Current status of the laser guide star adaptive optic system for Subaru Telescope. In Adaptive Optics Systems [701510] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7015). https://doi.org/10.1117/12.789992