Optical filter and sensor system
US9354369B2 · kind B2 · utility
29Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2013 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Jul 16, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical filter having a passband at least partially overlapping with a wavelength range of 800 nm to 1100 nm is provided. The optical filter includes a filter stack formed of hydrogenated silicon layers and lower-refractive index layers stacked in alternation. The hydrogenated silicon layers each have a refractive index of greater than 3 over the wavelength range of 800 nm to 1100 nm and an extinction coefficient of less than 0.0005 over the wavelength range of 800 nm to 1100 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.