Seiko Epson Corporation

Ehs Lens Philippines, Inc.

Keiichi Suzuki

Katsumi Suzuki

Katsuyoshi Takeshita

Akiko Kawase

Hiroshi Katagiri

Hiroyuki Seki

Tomohito Fukui

Toshihiro Koike

The optical article includes an optical substrate comprising a concave surface with a radius of curvature of equal to or greater than 350 mm on one side and a convex surface with a radius of curvature of equal to or greater than 120 mm on the other side, a first antifouling layer directly or through at least one additional layer on the concave surface, and a second antifouling layer directly or through at least one additional layer on the convex surface, and satisfies the conditions below:0.01&#x2266;&#x3bc;L1&#x2266;0.120.1&#x2266;&#x3bc;L2&#x3bc;L1&#x3c;&#x3bc;L2 wherein &#x3bc;L1 denotes a coefficient of static friction of a surface of the first antifouling layer, and &#x3bc;L2 denotes a coefficient of static friction of a surface of the second antifouling layer.

Antifouling coating for eyeglass lenses with a higher coefficient of friction than uncoated lenses

An optical article includes: an optical base; and a layer that is provided on the optical base and contains SiOas a main component, the layer being a silicon-nitride-containing silicon oxide layer containing SiONu (s&#x3e;0, T&#x2267;0, u&#x3e;0).

Optical article and manufacturing method thereof

An optical article including a layer that has SiOx as a main component and is formed on an optical substrate, directly or with at least one different layer interposed between the layer and the optical substrate, a surface of the layer, which is in the opposite side to the optical substrate, being nitrided.

Optical article including a layer siox as main component and manufacturing method of the same

An adhesive tape which is to be arranged between a lens and at least one of a plurality of chucks in an edge-machining apparatus comprises an adhesive face for being in contact with the lens. A measurement of an adhesive strength of the adhesive face is 4 gf (0.0392 N) or more when a polyethylene terephthalate plate which has been subjected to a surface treatment with a fluorine-modified silicone parting agent is used as a test plate in an adhesive strength test method based on a 180&#xb0;-peeling method as defined in JIS Z 0237 'adhesive tape/adhesive sheet test method'. A technique which can be used to edge the lens in which an antifouling layer is formed by using a fluorine-containing silane compound having an excellent antifouling effect is also provided.

Adhesive tape and edging method using same

A spectacle lens that can lower the slipperiness of a lens surface to an extent that allows an edging process by making without deteriorating the stain-proofing performance of the stain-proofing layer, when a stain-proofing layer is formed of two or more kinds of silane compounds including at least one or more kinds of fluorine-containing silane compounds, and as for the dynamic friction coefficient of lens surfaces defined by each of the two or more kinds of silane compounds as a single component, the highest value of the dynamic friction coefficients 1.4 times or more of the lowest value of the dynamic friction coefficients; and a manufacturing method thereof are provided.

Growing community of inventors

Okaya, Japan

Keiichi Suzuki