Optical memory medium with predetermined guide tracks and prepit

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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3692754, 369277, G11B 724

Patent

active

056663455

ABSTRACT:
An optical memory disc medium contains a plurality of guide groove tracks. The guide groove tracks are arranged parallel to each other and they are used for controlling a position of a light beam. There is a land region between the guide groove tracks which is wider than the width of the guide groove tracks as measured in the disc-radial direction. Prepits for providing address information for the guide groove tracks are provided. The prepits are formed on the land regions and interposed between the lateral edges in the disc-radial direction of adjacent parallel guide groove tracks. Each prepit has a width which width is a narrower dimension than the width of each guide groove track as measured in the disc-radial direction.

REFERENCES:
patent: 4587648 (1986-05-01), Ando
patent: 4707816 (1987-11-01), Yonezawa et al.
Jan H.T. Pasman, et al., Developments in Optical Disk Mastering, 62/SPIE vol. 529 Optical Mss Data Storage (1985).

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