Anisoplanatism within the isoplanatic patch

J. C. Christou, E. Steinbring, S. M. Faber, D. Gavel, Jennifer Patience, E. Gates

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

2 Scopus citations


Measurements of anisoplanatism from data obtained with natural guide star adaptive optics on the Lick Observatory 3m are presented. These were obtained from short exposures of binary stars with the IRCAL camera whose field of view (∼ 20″) is generally considered isoplanatic in the K-band. However, measurable amounts of high-order anisoplanatism were present at separations of ∼ 7″ and ∼ 12″ with an isoplanatic patch size estimated to be ∼ 26″. Within this field, there was measurerable differential image motion between the binary star components. This image motion was small compared to the size of the diffraction-spot and therefore had negligible effect.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsP.L. Wizinowich, D. Bonaccini
Number of pages12
StatePublished - 2002
Externally publishedYes
EventAdaptive Optical System Technologies II - Waikoloa, HI, United States
Duration: Aug 22 2002Aug 26 2002


OtherAdaptive Optical System Technologies II
Country/TerritoryUnited States
CityWaikoloa, HI


  • Adaptive optics
  • Anisoplanatism
  • Astronomy
  • Strehl ratio
  • Tip-tilt motion

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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