Laser control for setting average recording power of "1" equal t

Details Laser control for setting average recording power of "1" equal t Laser control for setting average recording power of "1" equal t

1996-05-31

1998-04-07

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 13, G11B 7125

Patent

active

057373019

ABSTRACT:
An optical recording apparatus includes an optical system to focus a beam of light onto an optical recording medium; a laser source to generate the beam; a laser driver that modulates the output of the beam according to digital information to be recorded; and a controller that performs control in such a way that the average power per unit recording time of the beams used to record digital information "1" (or "0") and digital information "0" (or "1") onto the recording medium are virtually equal, and so that the peak power of the beams used to record the digital information "1" (or "0") and the digital information "0" (or "1") differ from each other.

REFERENCES:
patent: 5321672 (1994-06-01), Miyamoto et al.
patent: 5459701 (1995-10-01), Tokita et al.
patent: 5544137 (1996-08-01), Ohara
patent: 5555236 (1996-09-01), Hasegawa
patent: 5577019 (1996-11-01), Saito et al.

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