Gas cell with reflected light bundles
US6921899B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Apr 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/03
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a gas cell (2′) that includes a cavity (20) for a chosen gas volume, a light source (30), and one or more light bundle receiving units or detectors (21, 22, 23, 24, 25). The cavity (20) is formed by and delimited by, inter alia, a first partially elliptical mirror surface (20a) and two partially elliptical mirror surfaces, a second (20b) and a third (20c), which are opposed to said first mirror surface (20a) and which are so orientated in relation to each other that a light bundle (130a, 130b) will be reflected by said mirror surfaces (20a, 20b, 20c) so as to form an optical measurement path extremity, and terminate in a light-receiving unit (21, 22, 23, 24, 25) allocated to a chosen measurement path extremity. The light source (30) is disposed in one end region of said cavity (20) and a reflector (30a, 30b) which functions to cause emitted light bundles to converge towards a focusing point (F) is also disposed in said one end region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.