Method for increasing fluorescent signal of optical disks with fluorescent reading and resultant discs
AssigneeD Data Inc.
InventorsMark Alperovich, Irene Zuhl, Eugene Levich, Arie Chaikin
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Abstract
A fluorescent composition for use with single-layer and multilayer optical discs for CD ROM, DVD and WORM type devices with fluorescent reading is disclosed. The composition comprises a fluorescent dye, film-forming polymer, plasticizer, surfactant and light stabilizer. A method of increasing fluorescent signal level from the optical discs both for single-layer and multilayer optical memory materials is also disclosed along with the resulting optical discs.
Claims13
A fluorescent single- or multi-layer optical disc for storing information, the disc comprising at least one information layer, said at least one information layer comprising:
- a transparent film substrate;
- a fluorescent composition covering the transparent film substrate and comprising a fluorescent dye, a film-forming polymer, a plasticizer, a surfactant and a light stabilizer;
- and
- a primer layer placed between the substrate and the fluorescent composition;
- wherein at least one of the substrate, the fluorescent composition and the primer layer comprises a material providing effective adhesion of the fluorescent composition to the substrate or the primer layer so as to prevent formation on an inter-layer boundary of non-fluorescent poly-molecular associates of fluorescent dyes causing quenching of fluorescence, and
- wherein the dye is present in an amount of 0.1 weight percent to 10 weight percent of the information layer and the plasticizer is present in an amount of 10 weight percent to 50 weight percent of the information layer.
A method of increasing a fluorescent signal level from a fluorescent single- or multi-layer optical disc for storing information, the disc comprising at least one information layer, said method comprising:
- (a) forming said at least one information layer from:
- a transparent film substrate;
- a fluorescent composition covering the transparent film substrate and comprising a fluorescent dye, a film-forming polymer, a plasticizer, a surfactant and a light stabilizer;
- and
- a primer layer placed between the substrate and the fluorescent composition;
- wherein at least one of the substrate, the fluorescent composition and the primer layer comprises a material providing effective adhesion of the fluorescent composition to the substrate or the primer layer so as to prevent formation on an inter-layer boundary of non-fluorescent poly-molecular associates of fluorescent dyes causing quenching of fluorescence,
- (b) heating said at least one information layer to a temperature sufficient to improve adhesion of the fluorescent composition to the substrate or primer layer,
- wherein the dye is present in an amount of 0.1 weight percent to 10 weight percent of the information layer and the plasticizer is present in an amount of 10 weight percent to 50 weight percent of the information layer.
A fluorescent single- or multi-layer optical disc for storing information, the disc comprising at least one information layer, said at least one information layer comprising:
- a transparent film substrate;
- a fluorescent composition covering the transparent film substrate and comprising a fluorescent dye, a film-forming polymer, a plasticizer, a surfactant and a light stabilizer;
- and
- a primer layer placed between the substrate and the fluorescent composition;
- wherein at least one of the substrate, the fluorescent composition and the primer layer comprises a material providing effective adhesion of the fluorescent composition to the substrate or the primer layer so as to prevent formation on an inter-layer boundary of non-fluorescent poly-molecular associates of fluorescent dyes causing quenching of fluorescence, and
- wherein the dye is present in an amount sufficient to provide a transmittance at a wavelength of maximum absorption through the information layer of about 92% to about 96%.
Dependencies are inferred from the claim text.