Protected optical disc

Details Protected optical disc Protected optical disc

G - Physics

11

B

352/32.4

G11B 7/00 (2006.01) G11B 7/24 (2006.01)

Patent

CA 1122321

Abstract of the Disclosure PROTECTED OPTICAL DISC This disc has a layer of an inscribable and optically legible-recording material deposited on a transparent plate traversed by the recording or reading beam and pro- tected from the outside by a cover formed for example by a metal sheet, whose two surfaces are fixed to the layer so as to form a space in front of the latter.

336630

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