Abstract: An antiglare transparent substrate includes a transparent substrate which includes a chemically strengthened glass and has a first main surface and a second main surface. The first main surface includes: a first smooth region having an arithmetic average roughness Ra of 0.05 nm or more and 2 nm or less; and a first rough region having an arithmetic average roughness Ra larger than the arithmetic average roughness Ra of the first smooth region. The second main surface includes, in at least a part of a region facing the first smooth region, a second smooth region having an arithmetic average roughness Ra of 0.05 nm or more and 2 nm or less.

Abstract: An antiglare transparent substrate includes a transparent substrate which includes a chemically strengthened glass and has a first main surface and a second main surface. The first main surface includes: a first smooth region having an arithmetic average roughness Ra of 0.05 nm or more and 2 nm or less; and a first rough region having an arithmetic average roughness Ra larger than the arithmetic average roughness Ra of the first smooth region. The second main surface includes, in at least a part of a region facing the first smooth region, a second smooth region having an arithmetic average roughness Ra of 0.05 nm or more and 2 nm or less.

Abstract: A glass plate, curved around a first axis, has a first surface being concave and a second surface being convex. In a cross sectional view of a plane perpendicular to the first axis, both end portions of the second surface are chemically strengthened. Compressive stress produced by ion exchange in the both end portions of the second surface is larger than that of the first surface. An X axis includes a line segment connecting one end point and a point, most distant from the one end point, on the cross section of the second surface. A Y axis passes a center point of the line segment, and positive direction is from a first surface toward a second surface. A second-order coefficient of a quadratic curve that approximates second-order differential values of a locus of a partial shape in a positive Y value region in the cross section is negative.

Abstract: The present invention relates to a cover member (1) made of chemically strengthened glass for protecting an object to be protected, the cover member (1) being characterized by: at least one recessed part (7) being provided on at least one of a first main surface (3) and a second main surface (5) of the cover member (1); the cover member (1) integrally comprising a thin part (13) formed by the recessed part and a thick part (17) connecting with the thin part (13); and, defining tensile stress as positive and compressive stress as negative, the integral value S for main stress difference in the through-thickness direction of the thin part (13) at the position of the center of gravity of the thin part being less than 0 MPa.

Abstract: The present invention relates to a laminated glass including a first glass plate, a second glass plate and an intermediate layer provided between the first glass plate and the second glass plate, in which the first glass plate has a first face and a second face opposing the first face, the second glass plate has a third face and a fourth face opposing the third face, the intermediate layer is provided between the second face and the third face, the second glass plate is a chemically-strengthened glass, and in the second glass plate, when a compressive stress on the third face is denoted as CS(3), a tensile stress generated in an interior of the second glass plate is denoted as CT, a thickness of the second glass plate is denoted as t, a depth of the compressive stress on a side of the third face is denoted as DOL(3) and a depth of a compressive stress on a side of the fourth face is denoted as DOL(4), CS(3)/[CT2×{t?(DOL(3)+DOL(4))}] is greater than 1.1 MPa?1×mm.

Abstract: A glass plate, curved around a first axis, has a first surface being concave and a second surface being convex. In a cross sectional view of a plane perpendicular to the first axis, both end portions of the second surface are chemically strengthened. Compressive stress produced by ion exchange in the both end portions of the second surface is larger than that of the first surface. An X axis includes a line segment connecting one end point and a point, most distant from the one end point, on the cross section of the second surface. A Y axis passes a center point of the line segment, and positive direction is from a first surface toward a second surface. A second-order coefficient of a quadratic curve that approximates second-order differential values of a locus of a partial shape in a positive Y value region in the cross section is negative.

Abstract: The present invention relates to a chemically strengthened glass having a first principal surface and a second principal surface facing the first principal surface, at least a portion of the first principal surface being chemically strengthened, wherein the depth of a compressive stress layer in at least a portion of the first principal surface continuously changes. This chemically strengthened glass can be suitably used in an application in which chemical strengthening characteristics that differ among different regions in the same plane are desired in a chemically strengthened glass.

Abstract: The present invention relates to a chemically strengthened glass having a first surface and a second surface facing the first surface, and having a compressive stress layer provided on the first surface and the second surface, in which a depth of compressive stress DOL1 (?m) of the first surface is larger than a depth of compressive stress DOL2 (?m) of the second surface, and a stress distribution in a sheet thickness direction of the chemically strengthened glass satisfies the following relational expression (1) and the following relational expression (3): CT1/CT2?0.8??(1) and CT1×L1/2?30 (MPa·mm1/2)??(3).

Abstract: A glass sheet is a single glass sheet having a first surface and a second surface facing the first surface. The glass sheet has a curvature part curved in a first direction and a second direction orthogonal to the first direction. A radius of curvature in the first direction of the curvature part is 8,500 mm or less. At least a part of the first surface has been chemically strengthened in the curvature part. In the first direction within the chemically strengthened region in the curvature part, an Na amount in the first surface is smaller than the Na amount in the second surface.

Abstract: The present invention provides a chemically strengthened glass suitable for use in applications in which the chemically strengthened glass is desired to have chemically strengthened properties that differ from surface to surface. The present invention relates to a chemically strengthened glass having a first surface and a second surface which faces the first surface, in which the first surface has a depth of compressive stress layer DOL1 (?m) which is larger by at least 3 ?m than a depth of compressive stress layer DOL2 (?m) of the second surface, the second surface has a surface compressive stress CS2 (MPa) which is higher by at least 50 MPa than a surface compressive stress CS1 (MPa) of the first surface, and the chemically strengthened glass satisfies the following relational expressions (2) and (3): [Dh(E)?Dh(1)]<0??(2) [Dh(E)?Dh(2)]>0??(3).

Abstract: The present invention relates to a laminated glass including a first glass plate, a second glass plate and an intermediate layer provided between the first glass plate and the second glass plate, in which the first glass plate has a first face and a second face opposing the first face, the second glass plate has a third face and a fourth face opposing the third face, the intermediate layer is provided between the second face and the third face, the second glass plate is a chemically-strengthened glass, and in the second glass plate, when a compressive stress on the third face is denoted as CS(3), a tensile stress generated in an interior of the second glass plate is denoted as CT, a thickness of the second glass plate is denoted as t, a depth of the compressive stress on a side of the third face is denoted as DOL(3) and a depth of a compressive stress on a side of the fourth face is denoted as DOL(4), CS(3)/[CT2×{t?(DOL(3)+DOL(4))}] is greater than 1.1 MPa?1×mm?1.