Characterization of a novel focusing/tracking technique with increased feedthrough immunity for optical-disk applications: the double-astigmatic method

Bruce E. Bernacki, Keith Bates, M. Mansuripur, Delbert Hansen, Daniel Cisneros

Research output: Contribution to journalArticle


A presentation is given of a novel focusing tracking technique with increased feedthrough immunity applied to optical disks. The double-astigmatic method is discussed. A description is given of the system model and of the single-astigmatic method. The double-astigmatic method and plots of intensity of the detector plane for the beam centered on the land when 45 degrees astigmatism is presented are given.

Original languageEnglish (US)
Pages (from-to)5789-5796
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Issue number1
StatePublished - Jan 1 1993


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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