Optical element having anti-reflection coating
US7619821B2 · kind B2 · utility
6Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2007 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Nov 29, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2218/113
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element comprising a lens having a portion with a surface inclination angle of 50° or more within an effective-diameter region, the portion being 10% or more of the effective-diameter region in a projected area, and an anti-reflection coating formed on the lens, the anti-reflection coating having fine roughness with three-dimensional average surface roughness of 5-100 nm on the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.