Wide field of view narrowband imaging filter technology
US10794819B2 · kind B2 · utility
0Cited by
3References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2018 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Nov 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus used for detecting gaseous chemicals. The method and apparatus use an interferometer to filter received light by wavelength, creating an image only using light with wavelengths that are affected by the presence of a gaseous chemical. A reference image composed of light with wavelengths unaffected by the presence of a gaseous chemical is also created and used as a reference. A gaseous chemical is detected where the ratio of the intensity of the two images changes. Despite the high spectral resolution of the filter, the system can operate with a very wide field of view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.