Optical data storage disc with a visible holographic image and m

Details Optical data storage disc with a visible holographic image and m Optical data storage disc with a visible holographic image and m

1995-06-07

2000-01-04

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369273, 430 1, 430321, G11B 700

Patent

active

060117672

ABSTRACT:
An optical data storage disc (e.g. a compact disc) carries a digital recording and also carries a holographic image. The holographic recording occupies an area separate from the area occupied by the digital recording, for example the holographic recording may be positioned in an annular area encircling the central area occupied by the digital recording.

REFERENCES:
patent: 4021606 (1977-05-01), Takeda et al.
patent: 4295162 (1981-10-01), Carlson
patent: 4550395 (1985-10-01), Carlson
patent: 5138604 (1992-08-01), Umeda et al.
patent: 5322747 (1994-06-01), Hugle
patent: 5452282 (1995-09-01), Abraham

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