Method for optically writing and/or reading information on optic

Details Method for optically writing and/or reading information on optic Method for optically writing and/or reading information on optic

1985-04-02

1986-03-18

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, 369275, 369286, 346 76L, G11B 700

Patent

active

045773068

ABSTRACT:
A method for writing and/or reading information on an optical recording element, such as an optical disk, utilizes a recording element comprising a recording layer having physical and optical properties which are optimized for phase-shift read-out. The optical properties of the recording layer give rise to a non-linear relative phase shift/layer thickness curve which, in combination with a predetermined nominal thickness of the recording layer, enhances the signal-to-noise ratio of the read-out signal.

REFERENCES:
patent: 3983317 (1976-09-01), Gloriose
patent: 4032691 (1977-06-01), Kido et al.
patent: 4139853 (1979-02-01), Ghekiere et al.
patent: 4270130 (1981-05-01), Houle et al.
patent: 4313188 (1982-01-01), Bartolini et al.
"Medium for Recording by Thermal Deformation"(17522) Research Disclosure, 11/78, pp. 38-41.

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