G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4
G11B 7/00 (2006.01) G11B 7/007 (2006.01) G11B 7/14 (2006.01) G11B 7/24 (2006.01)
Patent
CA 1179059
ABSTRACT OF THE DISCLOSURE: An optical disk recording and reproducing system which uses an optical disk at least one side of which is formed with a spiral groove which has a V-shaped or inverted-trapezoid-shaped cross sectional configuration. Both the radially inward and outward sloped faces of the groove are used as recording tracks which are tracked or scanned with the spot of a light beam in the case of recording or reproduction.
392640
Nagashima Michiyoshi
Takenaga Mutsuo
Gowling Lafleur Henderson Llp
Matsushita Electric Industrial Co. Ltd.
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