Optical element with antireflection film
US7116473B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Jan 11, 2006 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Jan 11, 2026 |
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.