Optical filter comprising a sensor window to provide a transmissivity of less than 5% between approximately 400 nm and approximately 780 nm and a blocker to block transmission at less than approximately 1000 nm
US12298545B2 · kind B2 · utility
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23References
20Claims
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Key dates
| Filing date | Oct 17, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Oct 17, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2826
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor window may include a substrate and a set of layers disposed onto the substrate. The set of layers may include a first subset of layers of a first refractive index and a second set of layers of a second refractive index different from the first refractive index. The set of layers may be associated with a threshold transmissivity in a sensing spectral range. The set of layers may be configured to a particular color in a visible spectral range and may be associated with a threshold opacity in the visible spectral range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.