Optical fiber remote sensing system with electromagnetic wave measurement
US5828058A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | May 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/31
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an optical fiber remote sensing system, which has: first and second light sources which are connected to ends of branched optical fibers and emit lights with two wavelengths different from each other; one or more optical detectors which conduct a photoelectric conversion of the lights propagated through the optical fibers from the first and second light sources and generate an electromagnetic wave with a wavelength corresponding to a difference between the two different wavelengths; and a measuring means which receives the electromagnetic wave propagated through a measured substance and measures a state of the measured substance based on an optical absorption characteristic of the measured substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.