Gas cell
US7564558B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Aug 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/317
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a gas cell which is included in a gas sensor and adapted to establish the presence of a gas and/or for determining the concentration of one such gas (G), comprising a cavity (2′) which is delimited by wall portions that have light reflecting properties and which is intended to enclose a volume ((G)) of said gas, and further comprising a light source (3) which is adapted to emit a light bundle (3a′) directed for reflection between cavity-associated and opposing wall portions, wherein a light bundle (3a″) is comprised of light rays which are reflected in a concave wall mirror surface (2b′) and adapted to be directed onto one or more light receivers (4, 5) which function to detect an absorption wavelength corresponding to the gas sample ((G)). The concave curved wall mirror surface (2b′) is adapted to reflect an obliquely received divergent light bundle (3a′) from the light source (3) onto a flat grating-allocated cavity-associated wall surface (2g′) whose reflecting surface includes or is structured as a Littrow arrangement (2g″). The light bundle (3a″) is adapted to fall onto the flat wall surface (2g′) at an angle which lies close to the Blaze angle…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.