Antifouling coating for eyeglass lenses with a higher coefficient of friction than uncoated lenses
AssigneeEhs Lens Philippines, Inc.
InventorKeiichi Suzuki
Life of this patent
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Abstract
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≦μL1≦0.12 0.1≦μL2 μL1<μL2 wherein μL1 denotes a coefficient of static friction of a surface of the first antifouling layer, and μL2 denotes a coefficient of static friction of a surface of the second antifouling layer.
Claims12
An optical article, which comprises:
- 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≦μL1≦0.12
- 0.1≦μL2
- μL1<μL2
- wherein μL1 denotes a coefficient of static friction of a surface of the first antifouling layer, and μL2 denotes a coefficient of static friction of a surface of the second antifouling layer.
An optical article, which comprises:
- an optical substrate comprising a concave surface on one side and a convex surface 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≦μG1≦0.1
- 0.1≦μG2
- μG1<μG2
- wherein μG1 denotes a coefficient of static friction of a surface of the first antifouling layer when formed directly or through at least one additional layer on a flat glass substrate, and μG2 denotes a coefficient of static friction of a surface of the second antifouling layer when formed directly or through at least one additional layer on a flat glass substrate.
Dependencies are inferred from the claim text.