Optical memory disc

Details Optical memory disc Optical memory disc

1984-08-08

1987-01-06

Thomas, Alexander S.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

369282, 369290, B32B 302

Patent

active

046346171

ABSTRACT:
Concentric guide grooves are formed on a glass substrate, and recording medium is disposed on the glass substrate having the concentric grooves. A centering device is secured to the glass substrate in a manner that the center of the centering device is positioned at the center of the concentric guide grooves. In a preferred form, photopolymer is disposed between the centering device and the glass substrate as adhesive. The centering device is provided with an aperture through which ultraviolet rays are applyed to the photo-polymer to cure it.

REFERENCES:
patent: 1885415 (1932-11-01), Collison
patent: 2654816 (1953-10-01), Miessner
patent: 4470137 (1984-09-01), Tago
patent: 4480282 (1984-10-01), Brock et al.

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