Antireflection film and optical element having the same
US7035000B2 · kind B2 · utility
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8References
2Claims
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Key dates
| Filing date | Jun 6, 2005 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Jun 6, 2025 |
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.