Optical information recording device, optical playback device an

Details Optical information recording device, optical playback device an Optical information recording device, optical playback device an

1998-03-05

2000-06-20

Edun, Muhammad

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369 47, G11B 700

Patent

active

060785527

ABSTRACT:
An optical recording device, an optical playback device and an optical recording medium for recording optical information are configured to effectively prevent illegal copying by controlling laser beam irradiation timing and laser beam intensity to record main data based on the length of pits or marks formed and to record identification data based on pit width.

REFERENCES:
patent: 5541904 (1996-07-01), Fite et al.
patent: 5805551 (1998-09-01), Oshima et al.

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