1 June 1994 Optical quality of the W.M. Keck Telescope
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter L. Wizinowich, Peter L. Wizinowich, Terry S. Mast, Terry S. Mast, Jerry E. Nelson, Jerry E. Nelson, Michael DiVittorio, Michael DiVittorio, Gary A. Chanan, Gary A. Chanan, "Optical quality of the W.M. Keck Telescope", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); doi: 10.1117/12.176164; https://doi.org/10.1117/12.176164


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