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Applied Optics

Applied Optics


  • Vol. 25, Iss. 22 — Nov. 15, 1986
  • pp: 4031–4034

Optical pregroove dimensions: design considerations

Manabu Yamamoto, Akinori Watabe, and Hiroo Ukita  »View Author Affiliations

Applied Optics, Vol. 25, Issue 22, pp. 4031-4034 (1986)

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This paper describes the designing pregroove dimensions to achieve stable data read-out. The spot size detection method and the push-pull method are used for focusing and tracking error signal detection, respectively. Experimental and theoretical results show that pregroove crosstalk and decrease in light intensity due to groove diffraction become smaller as the edge gradient of the pregroove decreases. The permissible range of the depth for a triangular pregroove is 40% larger than that of a rectangular pregroove. The triangular pregroove depth to attain the maximum tracking signal efficiency is about 100 nm for a refractive index of 1.5.

© 1986 Optical Society of America

Original Manuscript: February 4, 1986
Published: November 15, 1986

Manabu Yamamoto, Akinori Watabe, and Hiroo Ukita, "Optical pregroove dimensions: design considerations," Appl. Opt. 25, 4031-4034 (1986)

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  1. Y. Tsunoda, S. Horigome, Z. Tsutsumi, “Optical Digital Data Storage Technologies with Semiconductor Laser Head,” Proc. Soc. Photo-Opt. Instrum. Eng. 382, 24 (1983).
  2. O. Ito, K. Yoshimoto, I. Watanabe, T. Kubo, “Improvement of Focusing and Tracking Servos in Optical Disk Memory,” Soc. Photo-Opt. Instrum. Eng. 529, 145 (1985).
  3. H. Ukita, A. Watabe, K. Katoh, “MALS Head for Optical Recording,” in Technical Digest, Conference on Lasers and Electro-Optics (Optical Society of America, Washington, DC, 1983), paper WR2.
  4. H. H. Hopkins, “Diffraction Theory of Laser Read-out Systems for Optical Video Discs,” J. Opt. Soc. Am. 69, 4 (1979). [CrossRef]
  5. J. H. T. Pasman, H. F. Olijhok, B. Verkaik, “Developments in Optical Disk Mastering,” Proc. Soc. Photo-Opt. Instrum. Eng. 529, 61 (1985).
  6. T. Murakami, “Design of the Pregroove-Shape on an Optical Disk Based on the Light Diffraction Analysis,” Trans. Jpn. IECE J67-C, 2 (1984) (in Japanese).

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