Magnetooptic recording medium cartridge for two-sided overwritin

Details Magnetooptic recording medium cartridge for two-sided overwritin Magnetooptic recording medium cartridge for two-sided overwritin

1991-08-09

1993-04-27

Nguyen, Hoa

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, 360135, 360137, 369292, G11B 1304, G11B 1110, G11B 1112, G11B 2303

Patent

active

052068447

ABSTRACT:
A magnetooptic recording medium cartridge which accommodates a double face type disk-like magnetooptic recording medium with which an overwriting can be performed by modulating only the intensity of a laser beam in accordance with two-valued information to be recorded, without modulating a recording magnetic field. The cartridge has two initial auxiliary magnetic field (Hini.) applying devices adapted to produce magnetic fields directed opposite to each other.

REFERENCES:
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patent: 4910622 (1990-03-01), Saito et al.
patent: 5088074 (1992-02-01), Sato
Swartz et al, "Stabilized Biasing of Semiconductor Lasers," The Bell Systems Technical Journal, Sep. 1983, vol. 62, No. 7, Part 1, pp. 1923-1936.

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