Optical information carrier having buffer spaces for maintaining

Details Optical information carrier having buffer spaces for maintaining Optical information carrier having buffer spaces for maintaining

1989-07-03

1990-12-25

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3461351, 369286, G11B 724

Patent

active

049808818

ABSTRACT:
Optical information carrier comprising an optically transparent layer and a reflective layer adjacent to each other whereby the interface comprises an optically readable information structure containing alternate areas with such different properties, so that a scanning light beam is modulated in correspondence with the information present in said structure. Between the surface of optically transparent layer and the surface of the reflective layer, one or more gas-filled interconnected buffer spaces are provided at positions described over the interface between the layers, and an excavation is provided at the edge of the carrier.

REFERENCES:
patent: 4480302 (1984-10-01), Kalk et al.
patent: 4547876 (1985-10-01), Ettenberg

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