Fiber optical measuring device for measuring electrical and magnetic quantities by laterally controlled photo-luminescence
US4514860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1983 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | May 31, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C23/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optical measuring device for measuring primarily electric voltage or magnetic field, comprises a transducer having a sensor element, the transducer being connected by means of at least one optical fiber to a measuring electronic unit provided with at least two light sources having different emission spectra for excitation of photo-luminescence in the sensor element and at least one photo-detector for detection of photo-luminescene emanating from the sensor element. The sensor element includes at least one luminescent layer arranged so that light from said optical fiber is arranged to fall towards the surface of the layer. Between the end surface of the optical fiber in the transducer and the surface of the luminescent layer, there is arranged at least one optical filter perpendicular to the ray path of the light. The luminescent layer is provided with at least two electrodes to generate, in the layer, a lateral electric field for the purpose of accelerating charge carriers which are excited by light emitted from the measuring electronic unit and transmitted to the luminescent layer via the optical fiber and through at least one of the filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.