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Proceedings Paper

Optical quality of the W.M. Keck Telescope
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Paper Abstract

Astronomical observations are now taking place on the Keck I telescope on a regular basis. We summarize here the status of the Keck I and II optics, and the current wavefront and image quality of the Keck I telescope as measured by in-telescope optical tests. Shack-Hartmann measurements of the individual primary mirror segments yield 80% encircled energy diameters that vary from 0.31 to 0.60 arc seconds. Full width at half maximum measurements of direct segment images obtained on a night of excellent seeing varied from 0.32 to 0.51 arcsec, and the combined image was 0.42 arcsec.

Paper Details

Date Published: 1 June 1994
PDF: 11 pages
Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994);
Show Author Affiliations
Peter L. Wizinowich, W.M. Keck Observatory (United States)
Terry S. Mast, W.M. Keck Observatory (United States)
Jerry E. Nelson, W.M. Keck Observatory (United States)
Michael DiVittorio, W.M. Keck Observatory (United States)
Gary A. Chanan, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 2199:
Advanced Technology Optical Telescopes V
Larry M. Stepp, Editor(s)

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