Recording method for opto-magnetic disk

Details Recording method for opto-magnetic disk Recording method for opto-magnetic disk

1992-05-22

1994-06-21

Argenbright, Tony M.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, G11B 1100

Patent

active

053233654

ABSTRACT:
A recording method for an opto-magnetic disk apparatus by which pit edge recording of an opto-magnetic disk can be achieved and the track recording density is enhanced. The recording method is applied to an opto-magnetic disk apparatus wherein a light emitting element is driven with a pulse signal to form pits on a record face of a disk and a magnetic field is applied to such pit portions to modulate the pits. According to the method, the amount of information to be included in a pit modulated is made equal to or greater than 2 bits, and the period of the pulse signal to drive the light emitting element is changed in response to a bit or bits for a fraction to be recorded.

REFERENCES:
patent: 4873680 (1989-10-01), Chung et al.
patent: 5020040 (1991-05-01), Lee
patent: 5065377 (1991-11-01), Spruit et al.

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