Optical disk and playback method for setting an optimum playback

Details Optical disk and playback method for setting an optimum playback Optical disk and playback method for setting an optimum playback

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.

REFERENCES:
patent: 5226027 (1993-07-01), Bakx
patent: 5513166 (1996-04-01), Tokumitsu et al.
patent: 5539720 (1996-07-01), Aoi
patent: 5617399 (1997-04-01), Spruit et al.
patent: 5629913 (1997-05-01), Kaku et al.
patent: 5732061 (1998-03-01), Kirino et al.

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