Gas detecting apparatus using laser absorption spectroscopy
US6603555B1 · kind B1 · utility
12Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Jan 6, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas detecting apparatus includes a gas cell, a laser source, a light diffuser and a photodetector. The gas cell has a gas inlet hole for letting the target gas come inside and a gas discharge hole for discharging the target gas, and retains a target gas to be detected. The laser source emits coherent light into the gas cell in order to detect a concentration of the target gas. The light diffuser is disposed in the optical path of the coherent light output from the laser source to diffuse the coherent light, thereby eliminating coherence of the coherent light. The photodetector receives light diffused by the light diffuser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.