Magneto-optic data recording system, actuating device therefor a

Details Magneto-optic data recording system, actuating device therefor a Magneto-optic data recording system, actuating device therefor a

1988-04-29

1990-10-09

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1304

Patent

active

049624920

ABSTRACT:
A magneto-optic data recording system and actuating device therefor comprises a permanent magnet mounted adjacent to a magneto-optic disk medium. The permanent magnet is rotatable about its longitudinal axis to change the polarity of the magnetic field which supplied to the medium. Rotation of the magnet is achieved by activation of electromagnet actuators located laterally adjacent to the permanent magnet. Rotation of the magnet through 180.degree. is preferably achieved within less than 1 period of revolution of the disk, preferably less than 1/2 the period of revolution of the disk.

REFERENCES:
patent: 2352023 (1944-06-01), Schuller
patent: 2751274 (1956-06-01), Andrews
patent: 2916547 (1959-12-01), Ginsberg et al.
patent: 2954547 (1960-09-01), Singhaus
patent: 3171106 (1965-02-01), Lemmond
patent: 3174140 (1965-03-01), Hagopian et al.
patent: 3228015 (1966-01-01), Miyata
patent: 3307163 (1967-02-01), Rabinow
patent: 3361878 (1968-01-01), Patterson et al.
patent: 3394360 (1968-07-01), Miyata
patent: 3513456 (1970-05-01), Nelson
patent: 3535688 (1970-10-01), Waring
patent: 3582570 (1971-06-01), Cushner
patent: 3624622 (1971-11-01), DiChen
patent: 3626114 (1971-12-01), Lewicki et al.
patent: 3629517 (1971-12-01), Grimm
patent: 3666894 (1972-05-01), Prochnow
patent: 3668671 (1972-06-01), Everett et al.
patent: 3715740 (1973-02-01), Schmit
patent: 3731290 (1973-05-01), Aagard
patent: 3739394 (1973-06-01), Becker
patent: 3778791 (1973-12-01), Lewicki et al.
patent: 4300176 (1981-11-01), Gilovich
patent: 4472748 (1984-09-01), Kato et al.
patent: 4477852 (1984-10-01), Ota et al.
patent: 4497006 (1985-01-01), Deguchi et al.
patent: 4497007 (1985-01-01), Greiner et al.
patent: 4509156 (1985-04-01), Ohara et al.
patent: 4539662 (1985-09-01), Hatano et al.
patent: 4573149 (1986-02-01), Deguchi et al.
patent: 4586092 (1986-04-01), Martens et al.
patent: 4594699 (1986-06-01), Browder
patent: 4610009 (1986-09-01), Connell
patent: 4630249 (1986-12-01), Braat et al.
patent: 4686661 (1987-08-01), Isaka
patent: 4695994 (1987-09-01), Steenbergen et al.
patent: 4701894 (1987-10-01), Watson
patent: 4701895 (1987-10-01), Van Sant
patent: 4706232 (1987-11-01), Funada et al.
patent: 4712203 (1987-12-01), Saito et al.
patent: 4748606 (1988-05-01), Naito et al.
patent: 4789972 (1988-12-01), Oldham
"Magneto-Optic Recording Technology," Kryder, J. Appl. Phys., vol. 51, No. 1, pp. 3913-3918.
"Research Applies Magnetic Thin Films and the Magneto Optic Effect in Storage Devices," Imamura, Journal of Electrical Engineering, Mar. 1983, pp. 100-103.
"Magneto-Optical Disk with Reflecting Layers," Ohta et al., Proceedings SPIE, vol. 382, pp. 252-259, (1983).
"MnAlGe Films for Magneto-Optic Applications," Sherwood et al., J. Appl. Physics, vol. 42, pp. 1704-1705, (1971).
"Control Mechanics," Van Rosmalen, Principles of Optical Disk Systems, pp. 125-188.
"Compact and Highly Efficient Faraday Rotators," Yoshino, Japanese Journal of Applied Physics, vol. 19, No. 4, Apr. 1980.
"A Compact Optical Isolator," Iwamura, Optical and Quantum Electronics, vol. 10, pp. 393-398.
"Compact Optical Isolator for Near-Infrared Radiation," Shibukawa et al., Electronics Letters, Nov. 24, 1977, vol. 13, No. 20.
"Simple, Compact, High-Performance Permanent-Magnet Faraday Isolator", Gauthier et al., Optics Letters, vol. 11, No. 10, Oct. 1986, pp. 623-625.

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