Optical information recording medium and information recording a

Details Optical information recording medium and information recording a Optical information recording medium and information recording a

1993-06-17

1996-02-20

Willis, Davis L.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, B32B 300

Patent

active

054935610

ABSTRACT:
An optical information recording medium, wherein concave and convex shaped guide grooves narrower in width W than the spot diameter of the laser beam is formed in the face of the recording film layer of a substrate, and the recording film layer undergoes optically detectable changes caused by the application of a laser beam thereto, the detectable changes being due to the changes in the optical phase of the reflected light or the transmitted light, and the changes in the optical phase being caused in the direction of reducing the optical phase difference between concave and convex portions of guide grooves disposed in the substrate.

REFERENCES:
patent: 4674081 (1987-06-01), Gerard et al.
patent: 5199022 (1993-03-01), Suzuki et al.
patent: 5213859 (1993-05-01), Aoi et al.
patent: 5249175 (1993-09-01), Akahira et al.

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