Optical recording and reproducing method utilizing recording med

Details Optical recording and reproducing method utilizing recording med Optical recording and reproducing method utilizing recording med

1995-06-06

1996-11-05

Dinh, Tan

Dynamic information storage or retrieval

Simultaneous diverse types of storage or retrieval

369288, 4302711, 4302731, G11B 1300, G11B 370

Patent

active

055724922

ABSTRACT:
A record blank for use in optical recording is formed by disposing in laminate form on a substrate a recording layer and a supplementary record layer, optionally with a separating layer interposed between the recording layer and the supplementary record layer. On irradiation with a recording light beam having a prescribed wavelength, in accordance with recording information, the recording layer and supplementary record layer locally form a co-melted mixture state (optically through breakage of the separating layer, if present) thus resulting in an optically detectable change in the record blank detectable by a reproducing light beam which has a wavelength the same as or different from the wavelength of the recording light beam.

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