Characteristics of optical read-only media with PWM recording

Hideharu Takeshima; Masae Kubo; Yoshimitsu Kobayashi; Takeo Nakamura; Akira Nakajima

doi:10.1117/12.137560

13 August 1992 Characteristics of optical read-only media with PWM recording

Hideharu Takeshima, Masae Kubo, Yoshimitsu Kobayashi, Takeo Nakamura, Akira Nakajima

Proceedings Volume 1663, Optical Data Storage; (1992) https://doi.org/10.1117/12.137560
Event: Optical Data Storage Topical Meeting, 1992, San Jose, CA, United States

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.

Citation Download Citation

Hideharu Takeshima, Masae Kubo, Yoshimitsu Kobayashi, Takeo Nakamura, and Akira Nakajima "Characteristics of optical read-only media with PWM recording", Proc. SPIE 1663, Optical Data Storage, (13 August 1992); https://doi.org/10.1117/12.137560

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