Investigation of certain diffraction effects in a double-layer optical disk

Jang Hoon Yoo, Chul Woo Lee, Dong ho Shin, Chanda Bartlett, Kit Iu Cheong, J. Kevin Erwin, M. Mansuripur

Research output: Contribution to journalConference article

Abstract

We report certain diffraction effects that are pertinent to the operation of double-layer optical recording media. The diffraction of light from the out-of-focus layer and the resulting distribution on the in-focus layer are studied using computer simulations. The findings are then verified by direct measurements. We also describe a technique for analyzing (by computer simulation) the focus-error signal, FES, in systems that use the astigmatic method in conjunction with the double-layer disk. The results of our computer simulations of the FES are compared with those measured in an actual disk drive; good agreement between computation and measurement is obtained.

Original languageEnglish (US)
Pages (from-to)150-158
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3109
DOIs
StatePublished - Dec 1 1997
Externally publishedYes
EventOptical Data Storage '97 - Tucson, AZ, United States
Duration: Apr 7 1997Apr 9 1997

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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