Abstract: An optical device is configured such that the device includes an inorganic light-transmissive base material and an organic antireflection layer, which is provided on a principal surface of the light-transmissive base material and contains an organosilicon compound, an epoxy group-containing organic compound, and hollow silica, and the light-transmissive base material and at least one of the organosilicon compound and the epoxy group-containing organic compound are covalently bonded to each other. Since dirt, dust, etc. do not adhere to a principal surface of the light-transmissive base material during film formation, the occurrence of a defect in the organic antireflection layer can be prevented. The organic antireflection layer has a larger contact angle than an antireflection layer made of an inorganic material, and therefore has a higher dust-proof effect than an inorganic antireflection layer, and thus, dirt, dust, etc. hardly adhere thereto.

Abstract: An optical article includes: an optical substrate, and a functional layer laminated on the surface of the optical substrate, the functional layer having a thickness T ?m that satisfies the following condition: 6.5dn+4.0?T?100 wherein the thickness T is larger than 5 ?m, and dn is the refractive index difference at the boundary of the optical substrate and the functional layer and satisfies the following condition: 0.06?dn?0.4.

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: An optical article includes: an optical substrate, and a functional layer laminated on the surface of the optical substrate, the functional layer having a thickness T ?m that satisfies the following condition: 6.5dn+4.0?T?100 wherein the thickness T is larger than 5 ?m, and dn is the refractive index difference at the boundary of the optical substrate and the functional layer and satisfies the following condition: 0.06?dn?0.

Abstract: A pneumatic tire prepared by using a rubber composition prepared by compounding precipitated silica with a rubber component comprising 100 parts by mass of a rubber component (A) comprising at least one of a natural rubber and a synthetic diene base rubber and 5 to 60 parts by mass of an aromatic vinyl compound-diene compound copolymer (B) having a weight average molecular weight of 4,000 to 250,000 which comprises 0 to 80% by mass of the aromatic vinyl compound and in which a vinyl bond content in the parts of the diene compound is 0 to 80% by mass, wherein a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) (m2/g) of the precipitated silica and the mode Aac (nm) in diameters of primary aggregates thereof determined by acoustic measurement of particle size distribution satisfy equation (I) shown below: Aac??0.76×(CTAB)+274??(I) and an ignition loss (mass reduction % when heated at 750° C.

Abstract: An optical article includes: an optical substrate, and a functional layer laminated on the surface of the optical substrate, the functional layer having a thickness T ?m that satisfies the following condition: 6.5dn+4.0?T?100 wherein the thickness T is larger than 5 ?m, and dn is the refractive index difference at the boundary of the optical substrate and the functional layer and satisfies the following condition: 0.06?dn?0.4.

Abstract: An optical article includes: an optical substrate, and a functional layer that is light-transmissive and is laminated to the surface of the optical substrate, the period Pk (nm?1) of reflectance of the functional layer in the k-space being not more than 3.66×10?5.

Abstract: An optical article includes: an optical substrate, and a functional layer that is light-transmissive and is laminated to the surface of the optical substrate, the period Pk (nm?1) of reflectance of the functional layer in the k-space being not more than 3.66×10?5.

Abstract: An optical article includes: an optical substrate, and a functional layer laminated on the surface of the optical substrate, the functional layer having a thickness T ?m that satisfies the following condition: 6.5dn+4.0?T?100 wherein the thickness T is larger than 5 ?m, and dn is the refractive index difference at the boundary of the optical substrate and the functional layer and satisfies the following condition: 0.06?dn?0.4.