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Applied Optics

Applied Optics


  • Vol. 29, Iss. 20 — Jul. 10, 1990
  • pp: 3046–3051

High density recording by superresolution in an optical disk memory system

Yutaka Yamanaka, Yutaka Hirose, Hiroaki Fujii, and Keiichi Kubota  »View Author Affiliations

Applied Optics, Vol. 29, Issue 20, pp. 3046-3051 (1990)

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High density optical disk recording using an optical superresolution technique is proposed. By setting a shading band in the center of the collimating beam, the focused spot size on the recording medium is reduced to 80% compared with that of a conventional optical recording. The readout signal degradation affected by the focused spot sidelobe on the recording medium is suppressed by spatially extracting the main lobe region from the reflected back beam using a slit on a reimaged plane. The linear recording density has been improved to 1.2 times as high as that for a conventional optical recording using a normal resolution optical head.

© 1990 Optical Society of America

Original Manuscript: October 10, 1989
Published: July 10, 1990

Yutaka Yamanaka, Yutaka Hirose, Hiroaki Fujii, and Keiichi Kubota, "High density recording by superresolution in an optical disk memory system," Appl. Opt. 29, 3046-3051 (1990)

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  1. H. Sukeda, M. Ojima, M. Takahashi, T. Maeda, “High Density Magneto-Optical Disk Using Highly Controlled Pit-Edge Recording,” in Postdeadline Digest, ISOM’87 (1987), paper FC1.
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