Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1995-08-11
1996-11-19
Wong, Don
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369112, G11B 7013
Patent
active
055770177
ABSTRACT:
An optical information recording and/or reproducing apparatus includes an irradiating device for irradiating light polarized in a predetermined direction onto a magnetooptical recording medium having a plurality of tracks, the irradiating device includes an objective lens, having a curved surface, for converging the light irradiated onto the recording medium to form a micro spot, an applying device for applying a predetermined magnetic field to the recording medium and a detecting device for detecting interference light caused by interference of light produced by a magnetooptic effect of the recording medium and light produced by diffraction at the curved surface of the lens, and for reproducing recording information.
REFERENCES:
patent: 4982383 (1991-01-01), Matsushita et al.
patent: 5043960 (1991-08-01), Nakao et al.
patent: 5153868 (1992-10-01), Fujinaga
Patent Abstracts of Japan, Kokai No. 58-029151, vol. 7, No. 109, May 1983.
Patent Abstracts of Japan, Kokai No. 02-198044, vol. 14, No. 487, Oct. 1990.
Levenson, et al., "Edge Detection for Magnetooptical Data Storage," Applied Optics, vol. 30, No. 2, Jan. 1991, pp. 232 through 252.
Aratani, et al., "Magnetically Induced Super Resolution in Novel Magneto-Optical Disk," Optical Data Storage Topical Meeting, vol. 5, Feb. 1991, pp. 112 through 119.
Hoshi Hiroaki
Matsumura Susumu
Yamaguchi Eiji
Yamamoto Masakuni
Canon Kabushiki Kaisha
Wong Don
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