Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1993-09-24
1996-04-16
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430962, 430945, G11B 724
Patent
active
055081436
ABSTRACT:
An optical recording medium comprises a baseplate and a record film, on which information is recorded,disposed on the base plate, the record film containing 5-dimethylamino indolyl fulgide, of the specific formula, and a resin binder. The information recorded in the optical recording medium is reproduced by irradiating a first light to the record film, the first light being absorbed by 5-dimethylamino indolyl fulgide in an open ring form, whereby the open ring form is changed to a closed ring form and information is recorded and irradiating a second light to the record film in which record is recorded, the second light having zero of quantum yield in changing the closed ring form to the open ring form and being absorbed by the closed ring form, whereby the recorded information is reproduced.
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Yokoyama et al., "Synthesis and Photochromic Behavior of 5-Substituted Indolylfulgides", Jul. 1991, Chem. Lett., pp. 1125-1128.
"Photochromism of a Protonated 5-Dimethylaminoindolyl Fulgide: A Model of a Non-Destructive Readout for a Photon Mode Optical Memory", Yokoyama et al., pp. 1722-1724, (1991).
"Photochromic Fulgides Applicable to Optical Information Storage--Discovery of New Non-destructive Readout Method", Yokoyama et al., pp. 998-1005, (1992).
Matsui Fumio
Taniguchi Hitoshi
Bowers Jr. Charles L.
McPherson John A.
Pioneer Electronic Corporation
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