Optical disc

Details Optical disc Optical disc

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) G11B 7/013 (2006.01) G11B 7/09 (2006.01)

Patent

CA 2023697

Abstract of the Disclosure An optical disk including a disk substrate having guide grooves in one of a spiral shape and a concentric shape, and pits formed between adjacent guide grooves according to predetermined information signals such as address information signals, etc. An optical recording layer is formed in the shape of a thin film on the disk substrate. The guide grooves have a depth ranging from about .lambda./8 to about .lambda./4 and the pits have a depth ranging from about .lambda./4 to about .lambda./2, where .lambda. is a wavelength of a reproducing light beam.

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