Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1991-06-25
1992-11-03
Laroche, Eugene R.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360 59, 369 4442, 369110, 369112, H04B 120, G11B 502, G11B 700, G11B 2110
Patent
active
051611333
ABSTRACT:
A magneto-optical (M-O) storage detection channel which includes optical means for detecting edge transitions between magneto-optical domains. The beam returning from the storage medium is analyzed both spatially and in polarization. When a transition is centered under the read laser beam, the spatial reversal in the sign of the amplitude of the signal polarization due to the spatially nonuniform Kerr rotation is compensated by a reversal due to spatially nonuniform (split) detectors or a matched optical filter. The optical powers on the two sides of each split detectors or on two independent detectors sensitive to orthogonal polarizations become unequal thereby producing an electrical signal signal which comprises spaced peaks in opposite directions at the leading and trailing edges of the M-O domain or mark.
REFERENCES:
patent: 3736046 (1973-05-01), Zook
patent: 3992575 (1976-11-01), Valzel et al.
patent: 4059841 (1977-11-01), Bricot et al.
patent: 4065786 (1977-12-01), Stewart
patent: 4525828 (1985-06-01), Higashiyama et al.
patent: 4702603 (1987-10-01), Augustyn
patent: 4794585 (1988-12-01), Lee
patent: 4894815 (1990-01-01), Yamanaka
patent: 4926403 (1990-05-01), Tsuyuguchi et al.
patent: 4939710 (1990-07-01), Fuji et al.
patent: 4945529 (1990-07-01), Ono et al.
patent: 4953124 (1990-08-01), Koyama
Glembocki Christopher
International Business Machines - Corporation
LaRoche Eugene R.
Millett Douglas R.
Schmid, Jr. Otto
LandOfFree
Magneto-optical storage system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magneto-optical storage system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical storage system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2055566