Multi-layer topcoat for an optical member

Details Multi-layer topcoat for an optical member Multi-layer topcoat for an optical member

1998-01-22

1999-11-09

Le, Hoa T.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428421, 428422, 428429, 428447, 428448, B32B 2700, B32B 904

Patent

active

059810599

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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3M Product Information Sheet, "3M Fluorad.TM. Fluorochemical Coating FC-722," Apr., 1994.

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