Antireflection film and optical element having the same
US6947209B2 · kind B2 · utility
3Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/115
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An antireflection film includes alternately deposited high-refractive-index layers and low-refractive-index layers. The refractive indexes and extinction coefficients of the layers are such that the antireflection film exhibits sufficient antireflection characteristics even if the geometrical thickness thereof is small. An optical element having the antireflection film on a substrate exhibits high transmittance and has excellent optical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.