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Proceedings Paper

Characteristics of optical read-only media with PWM recording
Author(s): Hideharu Takeshima; Masae Kubo; Yoshimitsu Kobayashi; Takeo Nakamura; Akira Nakajima
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Paper Abstract

Characteristics of optical read-only media (O-ROM) having both grooves for tracking and pits that represent data by length were studied. Servo signals were observed over a wide bandwidth up to the data clock frequency and, in addition, the surface structures of the disks were observed. These observations showed that servo signals depend not only on the depth of grooves but also on that of the embossed data pits. Optimizing the depths of pits and grooves based on the results of pit density dependency of servo signals is necessary to ensure good characteristics of pit and groove signals.

Paper Details

Date Published: 13 August 1992
PDF: 13 pages
Proc. SPIE 1663, Optical Data Storage, (13 August 1992); doi: 10.1117/12.137560
Show Author Affiliations
Hideharu Takeshima, Mitsubishi Kasei Corp. (Japan)
Masae Kubo, Mitsubishi Kasei Corp. (Japan)
Yoshimitsu Kobayashi, Mitsubishi Kasei Corp. (Japan)
Takeo Nakamura, Mitsubishi Kasei Corp. (Japan)
Akira Nakajima, Mitsubishi Kasei Corp. (Japan)


Published in SPIE Proceedings Vol. 1663:
Optical Data Storage
Donald B. Carlin; David B. Kay; Alfred A. Franken, Editor(s)

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