Magneto-optical recording apparatus having paired devices for ap

Details Magneto-optical recording apparatus having paired devices for ap Magneto-optical recording apparatus having paired devices for ap

1994-10-28

1996-06-25

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

055306853

ABSTRACT:
A magneto-optical recording apparatus of the present invention is provided with an objective lens for focusing a light beam onto a magneto-optical recording medium. A pair of magnets is disposed on opposite sides of the magneto-optical recording medium and apply a writing magnetic field onto a portion of the magneto-optical recording medium that has been irradiated by the light beam while applying an initializing magnetic field greater than the writing magnetic field onto a portion apart from that irradiated by the light beam.

REFERENCES:
patent: 4825428 (1989-04-01), Toki
patent: 5025430 (1991-06-01), Takokoro et al.
patent: 5434844 (1995-07-01), Miyamoto et al.
"Direct Overwrite by Light Power Modulation on Magneto-Optical Multi-Layered Media" Jun Saito et al, Proc. Int. Sump. on Optical Memory, 1987, Japanese Journal of Applied Physics, vol. 26 (1987) Supplement 26-4, pp. 155-159.
"Recording Power Characteristics of 130 mm Overwritable MO Disby by Laser Power Modulation Method" (Haruhisa IIDA et al, Proc.Int.Symp.on Optical Memory, 1989, Japanese Journal of Applied Physics, vol. 28(1989)Suppl 26-4, pp. 155-159.
"Direct Overwriting Using Magnetooptical Trilayer Medium and One Magnet" Junichiro Nakayama et al, Jpn. J. Appl. Phys. vol. 32(1993) pp. 5439-5440, Part 1, No 11B, Nov. 1993.

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