Optically readable disc

Details Optically readable disc Optically readable disc

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01)

Patent

CA 1211558

ABSTRACT: Optically readably disc. An optically readable disc comprises a trans- parent substrate (1) which can be rotated about an axis of rotation (5) and which has an information layer (2) on one side, which layer may be prerecorded. The substrate does not have a centre hole but comprises a disc which, at least on the side where the information layer is lo- cated, is entirely flat and on the other side carries a centring member (6) which is adapted to cooperate with centring means (7) of an apparatus for writing and/or reading information on the disc.

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