Optical recording medium and the method of recording, reading, a

Details Optical recording medium and the method of recording, reading, a Optical recording medium and the method of recording, reading, a

1989-07-27

1992-02-11

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369284, 369286, 430945, 430495, 365106, G11B 700

Patent

active

050880861

ABSTRACT:
The invention provides an optical recording medium and a method of recording, reading, and erasing information to an optical recording medium, where information is recorded, read, and erased to the recording medium by applying beams projected from a light source capable of varying wavelength of beams. The recording medium contains at least two kinds of organic compounds each presenting photochromic phenomenon and being dispersed in binder. By projecting beams onto the optical recording medium, recording, reading, and erasure of information making use of a photochromic phenomenon can be executed independently against each organic compound dispersed in the recording medium. As a result, the optical recording medium promotes to increase the information recording density in proportion to the number of the kind of organic compounds.

REFERENCES:
patent: 3720921 (1973-03-01), Schools et al.
patent: 4789965 (1988-12-01), Michl et al.
patent: 4837063 (1989-06-01), Irie et al.
patent: 4845021 (1989-07-01), Miyazaki et al.
patent: 4864537 (1989-09-01), Michl et al.
Kampf, "Optische Datenspeicher . . . ", 1155 Technische Rundschau, 79 (1987), 26 Jun., No. 26, pp. 70-77.

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