Optical information recording method and apparatus

Details Optical information recording method and apparatus Optical information recording method and apparatus

1996-10-08

1998-04-28

Nelms, David C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 59, 369107, 369124, G11B 700

Patent

active

057454671

ABSTRACT:
In mark length modulation recording, a mark end portion correction pulse train is added to a recording pulse train, or laser radiation with bias power is applied between the recording pulse train and laser radiation with cooling power or the mark end portion correction pulse train, furthermore, the start time of the cooling power radiation, the duration of the cooling power radiation, and the shape of the mark end portion correction pulse train are varied in accordance with the mark length to be recorded, further, in CAV mode, the start time of the cooling power radiation or the duration of the cooling power radiation is varied in accordance with disk radius position, and when the recording pulse train consists of a start pulse, an end pulse, and pulses between the start and end pulses, laser radiation with cooling power is applied, or laser radiation with bias power is applied between the recording pulse train and cooling power application, and when the recording pulse train is varied in accordance with mark length and mark spacing, the timing to start the laser radiation with cooling power is delayed by a predetermined amount from the end pulse or determined based on the clock.

REFERENCES:
patent: 5257256 (1993-10-01), Terao et al.
patent: 5396480 (1995-03-01), Morishita et al.
patent: 5430696 (1995-07-01), Tokita et al.
patent: 5490126 (1996-02-01), Furumiya et al.
patent: 5581535 (1996-12-01), Saito et al.
patent: 5608710 (1997-03-01), Minemura et al.

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