Reproducing system for an optical disc

Details Reproducing system for an optical disc Reproducing system for an optical disc

1993-06-01

1995-05-30

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, 369120, 369 4437, 369 4441, 2502015, G11B 720

Patent

active

054208475

ABSTRACT:
A plurality of tracks are spirally arranged in a group on an optical disc. The tracks in the group are simultaneously radiated by laser beams. Adjacent tracks in the group are disposed at a radial distance d1, and adjacent spots of the laser beams on the tracks are disposed at a radial distance ds which is smaller than the distance d1.

REFERENCES:
patent: 4167024 (1979-09-01), Hamisch
patent: 4446545 (1984-05-01), Van Dijk
patent: 5168487 (1992-12-01), Ohsato et al.
Patent Abstracts of Japan, vol. 10, No. 225 (P-484), Aug. 6, 1986 & JP-A-61 061 236, Mar. 29, 1986.
"Optical Video Disc System for HDTV", Saeki et al, Proceedings of the Third International Workshop on HDTV, Sep. 9, 1989, pp. 519-526.
Patent Abstracts of Japan, vol. 7, No. 253 (P-235), Nov. 10, 1983, & JP-A-58 137 144, Aug. 15, 1983.

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