Preliminary measurements of residual tip-tilt motion and strehl ratios for laser guide star compensation at lick observatory

Julian C. Christou, Don Gavel, Jennifer Patience, Elinore Gates

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 (t exp = 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 residual tip-tilt motion reduces the Stehl ratio of long exposure imaging by only ∼7%.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsR.K. Tyson, D. Bonaccini, M.C. Roggenmann
Pages317-324
Number of pages8
Volume4494
DOIs
StatePublished - 2002
Externally publishedYes
EventAdaptive Optic Systems and Technologies II - San Diego, CA, United States
Duration: Jul 30 2001Aug 1 2001

Other

OtherAdaptive Optic Systems and Technologies II
CountryUnited States
CitySan Diego, CA
Period7/30/018/1/01

Keywords

  • Adaptive optics
  • Astronomy
  • Laser guide stars
  • Strehl ratio
  • Tip-tilt motion

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Christou, J. C., Gavel, D., Patience, J., & Gates, E. (2002). Preliminary measurements of residual tip-tilt motion and strehl ratios for laser guide star compensation at lick observatory. In R. K. Tyson, D. Bonaccini, & M. C. Roggenmann (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4494, pp. 317-324) https://doi.org/10.1117/12.454805