G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/007 (2006.01) G11B 7/005 (2006.01) G11B 27/19 (2006.01)
Patent
CA 2706897
An optical disc with a spiral or concentric track has a groove formed with a sinusoidal wobble along the track and a sector block disposed along the track. Sectors are formed by dividing each sector block into a plurality of parts. A synchronization mark on the disc is formed in the first sector in each sector block. Positive marks or negative marks on the discs are formed in sectors other than the first sector in each sector block. Each positive mark is a first groove discontinuity creating a discontinuity of a first width W1 in the track direction of the groove. Each negative mark is a second groove discontinuity creating a discontinuity of a second width W0 in the track direction of the groove. Each synchronization mark is a third groove discontinuity creating a discontinuity of a third width Ws in the track direction.
Furumiya Shigeru
Ishibashi Hiromichi
Ishida Takashi
Kobayashi Yoshiharu
Furumiya Shigeru
Ishibashi Hiromichi
Ishida Takashi
Kirby Eades Gale Baker
Kobayashi Yoshiharu
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