Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1997-05-27
1999-03-23
Swann, Tod R.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 54, 369 58, G11B 700
Patent
active
058869735
ABSTRACT:
A playback method for an optical disk and an optical disk which records data relating to playback power afford increased data density and accurate playback of high resolution data. The optical disk is played back to retrieve data by first reading out playback beam intensity data and then setting playback beam intensity based on the read playback beam intensity data. Data representing the type of optical disk is also read from the optical disk and then playback beam intensity is set. The disk itself preferably has data relating to optimum playback beam intensity recorded on the substrate in a predetermined position.
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Chu Kim-Kwok
Nikon Corporation
Swann Tod R.
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