Large-telescope natural guide star adaptive optics system

Details Large-telescope natural guide star adaptive optics system Large-telescope natural guide star adaptive optics system

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2201..619r&link_type=abstract

Proc. SPIE Vol. 2201, p. 619-628, Adaptive Optics in Astronomy, Mark A. Ealey; Fritz Merkle; Eds.

Physics

Optics

Scientific paper

This paper presents an adaptive optics (AO) system for a large IR telescope. The Keck Telescope on Mauna Kea is used as a case study. The system is designed to provide low-order wavefront correction using faint natural guide stars. It is shown that two innovations, namely the use of an AO-optimized CCD detector, and use of a variable control bandwidth, result in correction to a Strehl ratio of about 0.1 using guide stars of visual magnitude 18. Sky coverage is approximately 20% at this level of performance. Sky coverage rises to 100% at a Strehl ratio of 0.05.

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