Interferometric analyzer for multiple substance detection
US5218422A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1990 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/216
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An interferometric analyzer for the detection of substances having a structured absorption spectrum such as a periodic or quasiperiodic absorption line pattern, within a gas blend, and comprising a source of radiation for directing radiation into a radiation path that includes a container, cell or the like which contains the substances to be detected, the path includes further a filter system, which includes an electrically or temperature controlled Fabry Perot element such that the spacing between the transmission lines of the interference corresponds to spacing of absorption lines of different substances for different absorption bands of these substances; and a dispersion filter each circularly variable or another Fabry Perot filter is positioned in the radiation path for selecting a respective spectral region as far as a particular substance is concerned by means of the controlled disperging element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.