Multi-layer topcoat for an optical member
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United States of America Patent
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-
Nov 9, 1999
Issued Date -
N/A
app pub date -
Jan 22, 1998
filing date -
Apr 3, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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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