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Proceedings Paper

Implementation of 188-element curvature-based wavefront sensor and calibration source unit for the Subaru LGSAO system
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Paper Abstract

The Subaru laser guide star adaptive optics (AO) system was installed at the Nasmyth focus of the Subaru Telescope, and had the first light with natural guide star on October 2006. The AO system has a 188-element curvature based wavefront sensor with photon-counting avalanche photodiode (APD) modules. It measures high-order terms of wavefront using either of a single laser (LGS) or natural guide star (NGS) within a 2' diameter field. The AO system has also a source simulator. It simulates LGS and NGS beams, simultaneously, with and without atmospheric turbulence by two turbulent layer at about 0 and 6 km altitudes, and reproduces the cone effect for the LGS beam. We describe the design, construction, and integration of the curvature wavefront sensor and calibration source unit.

Paper Details

Date Published: 15 July 2008
PDF: 8 pages
Proc. SPIE 7015, Adaptive Optics Systems, 701564 (15 July 2008); doi: 10.1117/12.789882
Show Author Affiliations
Makoto Watanabe, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Shin Oya, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Yutaka Hayano, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Hideki Takami, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Masayuki Hattori, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Yosuke Minowa, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Yoshihiko Saito, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Meguru Ito, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Naoshi Murakami, National Astronomical Observatory of Japan (Japan)
Masanori Iye, National Astronomical Observatory of Japan (Japan)
Olivier Guyon, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Stephen Colley, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Michael Eldred, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Taras Golota, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Matthew Dinkins, National Astronomical Observatory of Japan/Subaru Telescope (United States)


Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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