Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1994-02-28
1997-09-09
Nguyen, Hoa T.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
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).
Deguchi Toshihisa
Inui Tetsuya
Ohta Kenji
Takahashi Akira
Van Kazuo
Nguyen Hoa T.
Sharp Kabushiki Kaisha
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