Use of selected glass types and glass thicknesses in the optical path to remove cross sensitivity to water absorption peaks
US10883875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2016 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments relate generally to systems and methods for filtering unwanted wavelengths from an IR detector. In some embodiments, it may be desired to remove or reduce the wavelengths absorbed by water, to reduce the effects of water on the detection of the target gas. In some embodiments, a filter glass may be used in the IR detector, wherein the filter glass comprises one or more materials that contain hydroxyls in their molecular structure, and wherein the spectral absorption properties of the filter glass are operable to at least reduce wavelengths of light absorbed by water from the optical, thereby reducing the IR detector's cross sensitivity to water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.