Abstract: A fluorescent conversion filter includes a fluorescent conversion film which facilitates converting light from a wavelength region between near ultraviolet and green to light in the red region which can be finely patterned. A color display device can be produced which includes the fluorescent conversion filter. The fluorescent conversion filter includes a fluorescent conversion film and a light absorption film on the display side surface of the flourescent conversion film. The flourescent conversion film has an absorbance of 1 or less in the wavelength region between 450 nm and 520 nm. The light absorption film has an absorbance of greater than I in the wavelength region between 450 nm and 520 nm. The fluorescent conversion film contains a photo-curing resin or a photo- and thermo-setting resin, that contains an acrylate polymer, a methacrylate polymer or an acrylate-methacrylate copolymer as its main component.

Abstract: An optical recording medium includes a substrate having light transmission properties, which has laminated on a main surface thereof a recording layer and a metal reflection layer. The recording layer is made of a compounded organic dye thin film which contains a specified aromatic amine compound in an amount of not smaller than 3% by weight but below 30% by weight based on the total weight of the recording layer and a specified asymmetric cyanine dye having absorption to light having a wavelength of 500 to 700 nm in an amount of not smaller than 30% by weight but below 97% by weight based on the total weight of the recording layer. The recording layer is applicable to a short-wavelength (500 to 700 nm) semiconductor laser so that an optical recording medium according to the DVD-ROM standards having excellent stability of the dye film and allowing a decrease in jitter component upon high density recording.

Abstract: This invention provides an optical recording medium complying with the DVD standards, having high sensitivity, possessing high dye film stability, having a high C/N ratio during high density recording, and being capable of reducing jitter components contained in reproduced signals, by finding an organic dye thin film and a medium configuration which can be adapted for a short wavelength semiconductor laser (wavelength 500 to 700 nm) and which are satisfactory in optical characteristics, and chemical, photochemical, physical and thermal stability, the optical recording medium comprising at least a recording layer and a metallic reflecting layer laminated on the surface of a grooved resin substrate transparent to laser light; wherein the recording layer comprises an organic thin film consisting essentially of a styrylcyanine dye of a specific structure and adapted for a short wavelength laser.

Abstract: An optical recording medium including a substrate which transmits light, which has a main surface, and which has a groove defined in the main surface; a recording layer formed on the main surface; and a metal reflection layer formed on the recording layer, wherein the recording layer is a thin film comprised of organic dye, contains at least one cyanine dye represented by general formula (I) as a main constituent, and is capable of corresponding to short-wavelength laser beam: ##STR1## where X- represents an iodide ion, a bromide ion, a perchlorate ion, a borofluoride ion, a tetrafluorophosphate ion, a tetrafluoroantimonate ion, a methylsulfate ion or a methylbenzenesulfonate ion; one of R.sub.1 or R.sub.2 represents a C.sub.3-18 substituent having an unsaturated bond, and another one of R.sub.1 and R.sub.2 represents a C.sub.3-18 substituent having one of an unsaturated bond, an alkyl group, an aryl group or an alkoxy group; Y.sub.1 and Y.sub.

Abstract: An optical information memory medium comprising a substrate, an improved underlying layer formed on the substrate surface, and a recording layer formed on the underlying layer and mainly consisting of an organic pigment is disclosed. In this optical information memory medium, the underlying layer is formed by causing a compound containing a hydroxyl or carboxyl group selected from the group consisting of a radical polymerizable monomer containing a hydroxyl or carboxyl group, a copolymer obtained from a monomer containing a hydroxyl or carboxyl group, and a polymer compound containing a hydroxyl or carboxyl group to react with a hydrolyzed condensate which is derived from an alkoxide or an aryloxide of a metal selected from the group consisting of Al, Ti, Zr, In, Zn, Mg, Ni, and Cu or from a chelate compound mainly consisting of the metal.

Abstract: An erasable optical information recording medium has a transparent substrate, and a recording layer supported by the substrate. The recording layer includes a thin film of at least one polydiacetylene having side chains. The polydiacetylene is capable of undergoing a reversible planar-nonplanar transition of the main chain structure of the polydiacetylene due to a conformational change of the side chains produced by irradiation of light. When the recording layer is irradiated with light, the reversible planar-nonplanar transition occurs at the irradiated portions to cause a corresponding change of optical properties of the recording layer, thereby recording information thereinto and erasing information therefrom.

Abstract: An optical recording medium such as an optical disk, which is capable of reversibly repeating a recording/erasing cycle. This optical recording medium comprises a transparent substrate and recording layer formed on the substrate. This recording layer comprise a liquid crystalline high polymer having side chains and a dyestuff having a recording-light absorbing property. The side chain may preferably comprises mesogen group, a monocyclic or polycyclic compound such as phenyl, benzyl, naphthyl or anthryl group, and alkyl or aryl group having 1 to 18 carbon atoms.

Abstract: An optical information recording medium has an optical information recording layer and a carrier for carrying said recording layer. The recording layer contains at least one organic dye represented by a formula: ##STR1## where R is a substituted or nonsubstituted phenylene group or naphthylene group, L is a methyne-based group, and Y is an unsaturated organic group.

Abstract: An optical information recording medium includes an optical information recording layer supported on a substrate.

Abstract: A magnetic recording medium having a modified surface, consisting essentially of (a) a substrate, (b) a ferromagnetic metal thin film formed on one side of the substrate by a vacuum deposition method, an ion plating method, a sputtering method or a plating method and (c) a lubricating coating layer formed on the thin film or on the back of the substrate or on both of them. The recording medium has an improved running stability, durability and corrosion resistance.

Abstract: A method of forming a colored and/or electrically conductive coating layer on a glass sheet by applying a paint containing an inorganic pigment and/or a metal powder together with a powdered glass frit and an organic liquid binder onto the glass sheet, by screen-printing for instance, so as to form a paint layer on the glass sheet surface, rendering the paint layer hard and untacky and thereafter firing the paint-applied glass sheet so as to melt the glass frit contained in the paint. The organic liquid binder comprises at least one acrylate which is selected from monofunctional acrylates and bifunctional acrylates and is polymerizable by radiation of ultraviolet rays. Hardening of the paint layer is accomplished by ultraviolet radiation of very short duration, and the polymerized acrylate can be completely burnt out at the firing step without leaving unburnt carbon which is detrimental to the coating layer.