Optical information recording medium

Details Optical information recording medium Optical information recording medium

1991-09-25

1994-04-19

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

430290, 430523, 430945, G11B 724

Patent

active

053053036

ABSTRACT:
An optical information recording medium comprising: a substrate; a recording film in which an optically detectable amount is subjected to change; and at least one additional layer; the recording film and the additional layer being provided on the substrate; information being recorded by partially changing the recording film through irradiation of a laser beam thereto and being reproduced by optically detecting change of the optically detectable amount; the recording film being made of material assuming a plurality of states having different optical constants, respectively; physical conditions of the additional layer being selected such that a differential coefficient of the optically detectable amount relative to the optical con- stants is small in at least one of the states.

REFERENCES:
patent: 4451915 (1984-05-01), LaBudde et al.

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