Cavity enhanced photo acoustic gas sensor
US7663756B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2008 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jul 21, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1704
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Devices and method for photo acoustically detecting a gas are disclosed. In one illustrative embodiment, a gas sensor includes an optical cavity defined by one or more optical segments separating at least two mirrors. A photo acoustic cell, configured to receive a gas from the surrounding environment, is provided at least partially within one or more of the optical segments of the optical cavity. One of the at least two mirrors is configured to couple electromagnetic radiation into the optical cavity and to interact with the gas. A detector is acoustically coupled to the photo acoustic cell to detect absorption of the electromagnetic radiation by the gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.