Fiber coupler temperature transducer
US4462699A · kind A · utility
27Cited by
19References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1981 |
| Grant date | Jul 31, 1984 |
| Priority date | — |
| Expiry date | Sep 10, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2826
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transducer for the measurement of temperature incorporates a fiber optic coupler having a coupling efficiency which varies in relation to the index of refraction of a thin layer of index matching liquid, such as index matching oil, placed between the optical fibers of the coupler. Since the index of refraction of the liquid varies predictably with temperature, the coupling efficiency of the transducer may be used to directly measure the temperature of the coupler and its surroundings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.