Protected optical disc

Details Protected optical disc Protected optical disc

1980-10-15

1983-04-12

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

369284, G01D 1534

Patent

active

043800165

ABSTRACT:
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 protected 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.

REFERENCES:
patent: 3560994 (1971-02-01), Wolff
patent: 4038663 (1977-07-01), Day
patent: 4074282 (1978-02-01), Balas
patent: 4264911 (1981-04-01), Wilkinson
patent: 4288528 (1981-09-01), Picquendar

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