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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN 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)
http://dx.doi.org/10.1364/AO.29.003046


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Abstract

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

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

Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-20-3046


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References

  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.
  2. T. Sekiguchi et al., “High Bit Rate Digital Video Recording Using Magneto-Optical Disks,” in Technical Digest, ISOM’87 (1987), paper FB4.
  3. G. Moore, “High Density Format For Sperry/Information Storage Inc. Second Generation Optical Drives,” Proc. Soc. Photo-Opt. Instrum. Eng. 695, 230–238 (1986).
  4. Y. Yamanaka, K. Kubota, H. Fujii, K. Kobayashi, T. Suzuki, H. Gokan, “High Density Magneto-Optical Recording Using 0.67 μm Band High Power Laser Diode,” IEEE Trans. Magn. MAG-24, 2300–2304 (1988). [CrossRef]
  5. H. Osterberg, J. E. Wilkins, “The Resolving Power of a Coated Objective,” J. Opt. Soc. Am 39, 553–557 (1949). [CrossRef]
  6. W. Lukosz, “Optical System with Resolving Powers Exceeding the Classical Limit,” J. Opt. Soc. Am. 56, 1463–1472 (1966). [CrossRef]

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