Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1993-09-24
1995-03-21
Dzierzynski, Paul M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369112, 369120, 369 4437, 369 4441, G11B 7095
Patent
active
054003121
ABSTRACT:
An apparatus reads data signal recorded on an optical disc on which a gathering track including n recording tracks and a guard track neighboring to the gathering track are spirally formed. The apparatus includes: light beam irradiating unit for irradiating (n+1) light beams onto boundaries of the n recording tracks and the guard track, photodetecting unit for receiving (n+1) light beams reflected by the surface of the optical disc and producing (n+1) track boundary data signals, and computing unit for calculating the (n+1) track boundary data signals to produce n read-out data signals corresponding to the data signals recorded on the n recording tracks.
REFERENCES:
patent: 5235584 (1993-08-01), Yoshio et al.
Dzierzynski Paul M.
Nguyen Kiet T.
Pioneer Electronic Corporation
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