Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1986-05-13
1989-01-10
Richardson, Robert L.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 46, 369 13, 369112, 360114, 250201, 365122, G11B 700
Patent
active
047978686
ABSTRACT:
An optical system for use with an optical memory including an optical arrangement for separating light reflected from the surface of the optical memory into a plurality of different resultant beams. This optical mechanism comprising four reflecting surfaces each of which are inclined at a different angle relative the optical memory to direct the resultant beams of light each in a different direction nor normal or parallel to each other. Preferably, at least three of these reflective surface are contiguous to one another. The optical system further includes a photodetector having a plurality of photosensitive regions aligned to receive the resultant beams from the aforementioned reflective surfaces.
REFERENCES:
patent: 4561032 (1985-12-01), Matsumoto et al.
patent: 4638470 (1987-01-01), Connell et al.
patent: 4654529 (1987-03-01), Ando
Magneto-Optical Disk Memory, Imamura, Electronics in Japan, pp. 25-29 (undated).
Digital Magneto-Optical Disk Drive, Deguchi et al., Central Research Laboratories Sharp Corporation, pp. ThC-C1-1 to ThC-C1-4 (Apr. 1984).
Kabushiki Kaisha Toshiba
Richardson Robert L.
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