Optical information recording/reproducing apparatus in which rec

Details Optical information recording/reproducing apparatus in which rec Optical information recording/reproducing apparatus in which rec

1988-11-18

1991-07-02

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

G11B 7125

Patent

active

050291556

ABSTRACT:
Before recording of data in a data recording area is started, a laser is made to emit light at a power level represented by a directing value which corresponds to an objective value in an area other than the data recording area where recording emission is possible, and the intensity of light emitted at that time is detected by a monitor circuit. The detected write power level and the directing value are compared, and the directing value is corrected using the difference between these two values so as to set a write power directing value which approximates to the objective value. Thereafter, a laser emits light at a power level represented by this directing value in the data recording area.

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