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AssigneeD Data Inc.
InventorsMark Alperovich, Eugene Levich, Irene Zuhl, Svetlana Makievskaya
Estimating the term…
High sensitive organic dye-in-polymer (DIP) medium for write-once-read-many (WORM) optical discs with fluorescent reading. The medium consists of a fluorescent color means, capable of absorbing writing radiation produced by a laser, a compound capable of generating free radicals upon influence of heat produced by the writing radiation and a polymer capable of producing a translucent film enabling high quantum yield of the fluorescence induced in the color means. The color means can be selected from xanthene dyes of the eosine and rhodamine groups, acridine, oxazine, azine, peylene, violanthrone, cyanine, phtalocyanine, indigoide colors and porphyries. The free radicals generating compound can be chosen from the group of compounds comprising azo and diazoi compounds or peroxyde compounds. The film producing polymer can be selected from the group of compounds comprising cellulose ethers, vinyl resins or acrylic resins.
A recording layer for write-once-read-many (WORM) optical disks with fluorescent reading, comprising:
A method of obtaining a single-layer optical WORM disc, which comprises:
A method of obtaining a single-layer optical WORM disc, comprising creation of a recording layer from two sub-layers, a lower sub-layer comprising fluorescent dye present in an amount of about 0.1 weight percent to 10 weight percent of the recording layer, and an upper sub-layer comprising a non-fluorescent dye capable of absorbing recording laser radiation and transforming the absorbed radiation to heat and a substance generating free radicals to decolorize the fluorescent dye, non-fluorescent dye, or both at high temperature.
A method of obtaining a single-layer optical WORM disc, comprising creation of a recording layer from two sub-layers, an upper sub-layer comprising fluorescent dye present in an amount of about 0.1 weight percent to 10 weight percent of the recording layer, and a lower sub-layer comprising a non-fluorescent dye capable of absorbing recording laser radiation and transforming the absorbed radiation to heat and a substance generating free radicals to decolorize the fluorescent dye, non-fluorescent dye, or both at high temperature.
Dependencies are inferred from the claim text.