Optical fiber based apparatus and sensor with enhanced signal for pressure measurements
US6756579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Sep 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring pressure in a medium comprises a laser for emitting light; a dichroic beam splitter that reflects the light from the laser; a first lens that receives and focuses the light from the beam splitter; a first optical fiber for receiving the light from the first lens; a crystal having fluorescence properties and having a hemispherical shape, the crystal being attached to an end of the first optical fiber; a second lens that receives and focuses fluorescence generated by the crystal and reflected by the dichroic beam splitter; a second optical fiber for receiving the fluorescence from the second lens; a spectrometer that receives the fluorescence from the second optical fiber; a streak camera connected to the spectrometer; a charge-coupled device connected to the spectrometer; and a delay generator connected to the charge-coupled device, the streak camera and the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.