Fiber optical temperature sensors
US4278349A · kind A · utility
51Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Jun 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optical temperature measuring apparatus is based on the ability of certain materials to change color in dependence on changes in temperature. Visible or invisible light having at least two different wavelengths is supplied to the material and the light emanating from the material is detected for determining the changes in the absorption characteristic of the material at the emitted wavelengths by determining the quotient between the detected signals from the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.