Optical filter and method for manufacturing same
US12248161B2 · kind B2 · utility
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2References
6Claims
0Family size
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Key dates
| Filing date | Dec 3, 2020 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Mar 20, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/281
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Provided is an optical filter capable of reducing the dependency on the angle of light incidence. An optical filter 1 includes a hydrogenated silicon-containing film 4, wherein in a Raman spectrum of the hydrogenated silicon-containing film 4 measured by Raman spectroscopy a ratio (SiH/SiH2) obtained from a ratio between an area of a peak derived from SiH and an area of a peak derived from SiH2 is 0.7 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.