Multi-layer topcoat for an optical member
US5981059A · kind A · utility
26Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jan 22, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.