Optical filtering in the collection path of a data storage device

Tom D. Milster, Mark S. Wang, Weiquan Li, Ed Walker

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The effects of placing a shading band in the collection path of a magneto-optical data storage device are presented. The shading band consists of an opaque region in the center of the collection aperture, which reduces the low-frequency response of the system without affecting the high-frequency response. This partially equalizes the system transfer function. Dynamic measurements indicate that the noise is also reduced in the low-frequency region, thus not significantly affecting the narrow-band carrier-to-noise ratio (CNR). The integrated signal-to- noise ratio (SNR) shows slight improvement in the high-frequency region.

Original languageEnglish (US)
Pages (from-to)5397-5401
Number of pages5
JournalJapanese Journal of Applied Physics
Issue number11 S
StatePublished - Nov 1993


  • Optical data storage
  • Optical filtering
  • Optical transfer function
  • Superresolution

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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