Abstract: Provided is an optical component or the like having a stealth mark that is invisible under visible light and is visible under light of a predetermined wavelength. An optical component includes a stealth mark that is invisible under the visible light and visible under the predetermined wavelength, and the stealth mark includes an impregnated region formed from a fluorescent coloring material, and the stealth mark is integrated into the optical component such that an outermost surface of the stealth mark is flush with a surface of the optical component.

Abstract: A method for producing an optical article includes laminating on a plastic substrate a first layer using a first composition. The first composition includes a first polyurethane resin containing an aromatic ring, a second polyurethane resin containing a carbonate backbone, metal oxide particulates, and an organosilicon compound.

Abstract: A method for producing an optical article includes laminating on a plastic substrate a first layer using a first composition, the first composition including two or more kinds of polyurethane resins each having a different average particle diameter, metal oxide particulates, and an organosilicon compound.

Abstract: A coating film comprises a binder component containing an organosilicon compound; and aggregated particles of silica based fine particles, the aggregated particles are dispersed in the binder component. The aggregated particles are protruded from a surface of the coating film to thereby form convex portions. When a shape of each of the convex portions is assumed to be a shape of a semiellipse spherical body including a long radius “a”, a short radius “b” and a protrusion height “c”, the convex portions include enlarged convex portions each of which satisfies the following relation: ??abc?1.0×10?12. A number of the enlarged convex portions is 200 or less per 1 mm2 of the surface of the coating film.

Abstract: A primer layer is formed on a plastic lens substrate, a hard coat layer is formed on the primer layer using a coating composition comprising metal oxide fine particles, an organosilicon compound represented by the general formula R1SiX13, and a compound having a biphenyl sulfide compound, and an organic antireflective layer. In the plastic lens comprising a plastic lens substrate as obtained above, a plastic lens having excellent durability, impact resistance and mar resistance, and a method of producing the plastic lens are provided.

Abstract: The plastic lens has the hard coat layer on a plastic lens base material containing at least sulfur atom and the organic anti-reflection film on the hard coat layer and further has a primer layer between the plastic lens base material and the hard coat layer. The hard coat layer comprises metal oxide particulates at least containing titanium oxide with rutile-type crystal structure and an organic silicon compound expressed by general Formula: R1SiX13. The organic anti-reflection film comprises a coating composition at least containing an organic silicon compound expressed by general Formula: R2nR3 mSiX24-n-m and silica system particulates of 1 to 150 nm mean particle diameter and has a refractive index which is lower than that of that of the hard coat layer by 0.10 or more.

Abstract: A plastic lens includes: a plastic lens base material; a hard coat layer formed on the plastic lens base material; an organic antireflection film formed on the hard coat layer; and a primer layer between the plastic lens base material and the hard coat layer. The plastic lens base material contains at least a sulfur atom. The hard coat layer contains at least: fine metal oxide particles containing a titanium oxide having a rutile-type crystalline structure; and an organosilicon compound represented by a general formula of R1SiX13. The antireflection film contains a coating composition containing at least: an organosilicon compound represented by a general formula of XmR23?mSi—Y—SiR23?mXm; an epoxy group-containing organic compound containing one or more epoxy group in a molecule; and fine silica particles with average particle size of 1 to 150 nm, the antireflection film having a refractive index lower than that of the hard coat layer by 0.10 or more.

Abstract: A method for producing an optical article includes laminating on a plastic substrate a first layer using a first composition. The first composition includes a first polyurethane resin containing an aromatic ring, a second polyurethane resin containing a carbonate backbone, metal oxide particulates, and an organosilicon compound.

Abstract: A method for producing an optical article includes laminating on a plastic substrate a first layer using a first composition, the first composition including two or more kinds of polyurethane resins each having a different average particle diameter, metal oxide particulates, and an organosilicon compound.

Abstract: An optical article includes a plastic substrate, wherein a primer layer and a hard coat layer are formed on a surface of the plastic substrate, and the primer layer is formed from a coating composition containing the following components (A) to (C): (A) a polyurethane resin; (B) metal oxide fine particles; and (C) an organosilicon compound.

Abstract: A primer layer is formed on a plastic lens substrate, a hard coat layer is formed on the primer layer using a coating composition comprising metal oxide fine particles, an organosilicon compound represented by the general formula R1SiX13, and a compound having a biphenyl sulfide compound, and an organic antireflective layer. In the plastic lens comprising a plastic lens substrate as obtained above, a plastic lens having excellent durability, impact resistance and mar resistance, and a method of producing the plastic lens are provided.

Abstract: An optical article includes a plastic substrate, a first layer which is adjacent to the plastic substrate and the refractive index of which decreases in the direction to be remoter from the plastic substrate, a second layer which is adjacent to the first layer and the refractive index of which is not higher than the refractive index of the surface part of the first layer, and a hard coat layer which is adjacent to the second layer and the refractive index of which is lower than the refractive index of the plastic substrate.

Abstract: An optical article includes a plastic substrate and, formed on a surface thereof, a primer layer and a hard coat layer, wherein the primer layer is formed from a coating composition containing the following components (A) to (C): (A) a polyurethane resin; (B) metal oxide fine particles; and (C) an organosilicon compound, and the hard coat layer is formed from a coating composition containing the following component (D): (D) metal oxide fine particles which do not contain titanium oxide.

Abstract: An optical article includes a plastic substrate, wherein a primer layer and a hard coat layer are formed on a surface of the plastic substrate, and the primer layer is formed from a coating composition containing the following components (A) to (C): (A) a polyurethane resin; (B) metal oxide fine particles; and (C) an organosilicon compound.

Abstract: A plastic lens includes: a plastic lens base material; a hard coat layer formed on the plastic lens base material; an organic antireflection film formed on the hard coat layer; and a primer layer between the plastic lens base material and the hard coat layer. The plastic lens base material contains at least a sulfur atom. The hard coat layer contains at least: fine metal oxide particles containing a titanium oxide having a rutile-type crystalline structure; and an organosilicon compound represented by a general formula of R1SiX13. The antireflection film contains a coating composition containing at least: an organosilicon compound represented by a general formula of XmR23-mSi—Y—SiR23-mXm; an epoxy group-containing organic compound containing one or more epoxy group in a molecule; and fine silica particles with average particle size of 1 to 150 nm, the antireflection film having a refractive index lower than that of the hard coat layer by 0.10 or more.

Abstract: Disclosed herein is a plastic lens which exhibits outstanding weather resistance and light resistance with a minimum of deteriorating effect on the organic antireflection thin film formed thereon. The plastic lens is composed of a plastic lens base material, a hard coating layer formed on the plastic lens base material, and an antireflection film formed on the hard coating layer, wherein the hard coating layer is one which is formed from a coating composition comprising inorganic oxide fine particles containing titanium oxide with a rutile-type crystallite and an organosilicon compound as a binder.

Abstract: A plastic lens includes a plastic lens substrate and a hard coat layer on the plastic lens substrate, and an organic antireflection film on the hard coat layer, the plastic lens substrate including at least a sulfur atom, the hard coat layer being a coating film formed with a coating composition which includes at least the following Component A and Component B, the organic antireflection film being a coating film which includes at least the following Component C and Component D, and has a refractive index that is lower than the refractive index of the hard coat layer by 0.

Abstract: An apparatus provides a correct image of the surface of an inner wall of a narrow red-hot coking chamber of a coke oven. The apparatus employs linear CCD cameras (LC2 to LC5). The cameras are arranged so that optical axes thereof obliquely cross the inner wall. The cameras are moved by a carriage (HSA) with a linear view field of the cameras being substantially in parallel with the inner wall. The cameras provide linear images while being moved. The linear images are combined into a two-dimensional image and stored in an image memory under the control of an image processing unit (11A). The image is read out of the memory and displayed or printed on an output unit (10, MOV, CPTR, PTR).

Abstract: Scrap containing copper is discriminated from iron scrap after being pulverized by imaging iron scrap using a color TV camera, treating RGB signals processed by each of the points in the image as a color vector, and discriminating scrap containing copper from iron scrap when the saturation value of the color vector is larger than a predetermined value and the hue angle of the color vector lies within a predetermined range.