Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1996-02-08
1998-11-17
Dinh, Tan
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
3692753, G11B 370
Patent
active
058386572
ABSTRACT:
An optical disc having a track pitch of 0.85 .mu.m, a shortest pit length of 0.49 .mu.m, a pit depth of 100 nm, and a pit width of 0.35 .mu.m is rotate at a linear velocity of 2.4-2.8 m/s such that the same is optically reproduced by a laser beam having a wavelength of 635 nm which is converged to a spot size of 0.9 .mu.m by an objective lens having a numerical aperture of 0.6. Accordingly, data is read from the optical disc at a transfer rate of 5.6 Mbps.
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Ichiura Shuichi
Ito Toshio
Kano Yasuyuki
Kato Seizo
Ota Osamu
Dinh Tan
Sanyo Electric Co,. Ltd.
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