Multi-layer topcoat for an optical member
First Claim
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1. An optical arrangement comprising:
- an optical substrate having opposed first and second sides; and
a multi-layer topcoat on at least one of said first and second sides, said topcoat being substantially transparent, said topcoat including;
an adhesion promotion layer formed of a silane; and
a lubricating layer formed of at least one fluorocarbon material, said lubricating layer contacting a surface of said adhesion promotion layer opposite to said substrate.
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Abstract
An optical arrangement includes a transmissive or reflective substrate having a first surface on which a multi-layer antireflection stack is formed. The antireflection stack is protected by a fluorocarbon lubricating layer that reduces the surface energy of the exposed surface to less than 40 dynes/cm, and preferably less than 20 dynes/cm. The fluorocarbon lubricating layer and a silane adhesion promotion layer form a durable topcoat having desired mechanical and optical characteristics. The preferred material for forming the lubricating layer is a fluoropolymer sold by 3M Company under the federally registered trademark FLUORAD.
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Citations
20 Claims
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1. An optical arrangement comprising:
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an optical substrate having opposed first and second sides; and a multi-layer topcoat on at least one of said first and second sides, said topcoat being substantially transparent, said topcoat including; an adhesion promotion layer formed of a silane; and a lubricating layer formed of at least one fluorocarbon material, said lubricating layer contacting a surface of said adhesion promotion layer opposite to said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of lubricating an optical arrangement comprising steps of:
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providing a light transmissive member having an upper surface of a material containing at least one of oxygen and silicon; and forming a topcoat on said upper surface, including selecting and applying a silane bonding agent and at least one fluorocarbon lubricant such that said topcoat is generally optically inactive and such that said silane bonding agent and said at least one fluorocarbon lubricant are in contact with each other. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A lamination on a display screen comprising:
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an antireflection coating having a plurality of layers, including an outermost layer of a material having at least one of silicon and oxygen; a silane adhesion promotion layer on said outermost layer; and a fluorocarbon lubricating layer on said silane adhesion promotion layer, said adhesion promotion and lubricating layers forming an optically passive topcoat. - View Dependent Claims (17, 18, 19, 20)
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Specification