Fiber-optic luminescence measuring system for measuring light transmission in an optic sensor
US4644154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Mar 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4206
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber-optic measuring device for measuring physical quantities, comprising a transducer unit and an electronic unit which are interconnected by means of at least one optic fiber. The measuring transducer unit comprises at least two photoluminescent elements, of which at least one is positioned in the ray path of light from the fiber, at least partly behind another element. The physical quantities to be measured are arranged to influence the light transmission between the photo-luminescent elements. The electronic unit includes at least two light sources having different emission spectra which are so chosen in relation to the absorption and transmission spectra of the photo-luminescent elements that one light source is arranged to excite substantially one of the photo-luminescent elements whereas the other light sources at least partly excite the other element or elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.