Optical disc

Details Optical disc Optical disc

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) G11B 7/08 (2006.01) G11B 23/42 (2006.01)

Patent

CA 1198209

OPTICAL DISC Abstract of the Disclosure An optical disc for use in optical memories has a memory data recording surface overlain by a protective cover to protect it from dust and contaminants. Position related data is recorded on the outer surface of the cover in a more gross and less densely packed format than is the memory data on the recording surface. By removing the positional data from the memory recording surface, (i) more space is made available on the memory recording surface and (ii) the positional data is more easily read by a moving positional scanning beam. -i-

441896

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