Method and system for optically recording and playing back infor

Details Method and system for optically recording and playing back infor Method and system for optically recording and playing back infor

1982-06-02

1985-09-03

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, 369 45, 369 46, G11B 1110

Patent

active

045396620

ABSTRACT:
Disclosed is a method and system for recording and playing back information utilizing a recording medium having a vertical magnetization film on and from which the information is recorded and read out by an optical means, characterized by changing the direction of the magnetic field applied on the recording medium during the application of a recording light beam so as to maintain the recording track of portions of the recording medium on which the previously recorded information is erased by the application of the recording light beam during editing operations.

REFERENCES:
patent: 3715740 (1973-02-01), Schmit
patent: 3731290 (1973-05-01), Aagard
patent: 3905040 (1975-09-01), Otala
patent: 3969576 (1976-07-01), Boonstra et al.
patent: 4085423 (1978-04-01), Tsunoda et al.
patent: 4275275 (1981-06-01), Bricot et al.
patent: 4290122 (1981-09-01), Bates et al.
patent: 4403318 (1983-09-01), Nagashima et al.
Imamura et al., "Experimental Study on Magneto-Optical Disk Exerciser with the Laser Diode and Amorphous Magnetic Thin Films", Japanese Journal of Applied Physics, vol. 19, No. 12, pp. L731-L734, 12/80.

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