Method for controlling the farm of a magnetic domain of a magnet

Details Method for controlling the farm of a magnetic domain of a magnet Method for controlling the farm of a magnetic domain of a magnet

1993-11-10

1996-04-30

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, G11B 700, G11B 712

Patent

active

055131654

ABSTRACT:
An optical recording control method determines an optimum recording laser power by effecting a test recording before information to be recorded is recorded on a disk. The recording laser power is formed of a plurality of powers. A relationship among the plurality of laser powers is regulated by power level ratios between respective powers, whereby a power used when a laser light is radiated on the disk can be controlled to be constant independent of an ambient temperature and a structure of a disk. Therefore, accurate recording marks can be formed on the disk.

REFERENCES:
patent: 5038338 (1991-08-01), Terao et al.
patent: 5185733 (1993-02-01), Finkelstein et al.
patent: 5268893 (1993-12-01), Call et al.
patent: 5327124 (1994-07-01), Funamoto
patent: 5345434 (1994-09-01), Ide et al.
patent: 5381396 (1995-01-01), Tanaka et al.
patent: 5418770 (1995-05-01), Ide et al.

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