Optical quality of the W.M. Keck Telescope

Peter L. Wizinowich; Terry S. Mast; Jerry E. Nelson; Michael DiVittorio; Gary A. Chanan

doi:10.1117/12.176164

1 June 1994 Optical quality of the W.M. Keck Telescope

Peter L. Wizinowich, Terry S. Mast, Jerry E. Nelson, Michael DiVittorio, Gary A. Chanan

Proceedings Volume 2199, Advanced Technology Optical Telescopes V; (1994) https://doi.org/10.1117/12.176164
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

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.

Citation Download Citation

Peter L. Wizinowich, Terry S. Mast, Jerry E. Nelson, Michael DiVittorio, and Gary A. Chanan "Optical quality of the W.M. Keck Telescope", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); https://doi.org/10.1117/12.176164

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