Optical interference filters
US12259497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2019 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Jul 12, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1226
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical device includes an emitter operable to emit a first light wave. The optical device also includes a detector operable to detect a second light wave that is based on the first light wave. The second light wave is susceptible to being coupled with an undesired light wave that is based on the first light wave. The optical device further includes an interference filter disposed on the detector. The interference filter includes a first filter portion and a second filter portion having a first set of layers formed from a first material and a second set of layers formed from a second, different material. The interference filter is operable to attenuate undesired light waves in multiple distinct environments based on the first and second sets of layers in the second filter portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.