Differential spot-size focus servo

Tom D. Milster, Mark S. Wang, Fred F. Froehlich, J. L. Kann, Jeff P. Treptau, K. E. Erwin

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

4 Scopus citations

Abstract

The performance of a differential spot-size (wax-wane) focus servo is described. Cross-talk from the tracks is analyzed in the single detector and differential focus circuits. Magnitude of the cross-talk is reduced by a factor of three in the differential circuit. A false FES signal is present when the spot crosses sector marks at an angle.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages348-353
Number of pages6
ISBN (Print)0819406082, 9780819406088
DOIs
StatePublished - 1991
EventOptical Data Storage '91 - Colorado Springs, CO, USA
Duration: Feb 25 1991Feb 27 1991

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1499
ISSN (Print)0277-786X

Other

OtherOptical Data Storage '91
CityColorado Springs, CO, USA
Period2/25/912/27/91

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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  • Cite this

    Milster, T. D., Wang, M. S., Froehlich, F. F., Kann, J. L., Treptau, J. P., & Erwin, K. E. (1991). Differential spot-size focus servo. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 348-353). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1499). Publ by Int Soc for Optical Engineering. https://doi.org/10.1117/12.45899