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Proceedings Paper

Preliminary measurements of residual tip-tilt motion and Strehl ratios for laser guide star compensation at Lick Observatory
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Paper Abstract

Adaptive optics performance using a sodium laser guide star at the Lick Observatory 3.0 m telescope is presented. In order to accomplish this the residual effects of natural guide star tip-tilt motion is removed. This is measured from 500 short exposure images (texp = 57ms). The data show instantaneous Strehl ratios ranging from ~ 0.10 to ~ 0.45 with a mean value of ~ 0.26. Centroid tracking of these data yield residual tip-tilt errors of ~ 21 mas, within specifications for the system. This resdual tip-tilt motion reduces the Strehl ratio of long exposure imaging by only ~ 7%.

Paper Details

Date Published: 4 February 2002
PDF: 8 pages
Proc. SPIE 4494, Adaptive Optics Systems and Technology II, (4 February 2002); doi: 10.1117/12.454805
Show Author Affiliations
Julian C. Christou, Univ. of California/Santa Cruz (United States)
Donald T. Gavel, Lawrence Livermore National Lab. (United States)
Jennifer Patience, Lawrence Livermore National Lab. (United States)
Elinor L. Gates, Univ. of California/Santa Cruz/Lick Observatory (United States)


Published in SPIE Proceedings Vol. 4494:
Adaptive Optics Systems and Technology II
Robert K. Tyson; Domenico Bonaccini; Michael C. Roggemann, Editor(s)

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