Digitally compatible optical pressure measurement
US4321831A · kind A · utility
18Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Sep 26, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L11/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for pressure measurement employs fiber optics to transport a broadband beam light to and from a remote electrically passive sensing head. In the sensing head, a linearly polarized beam is phase shifted in a birefringent plate, then passed through a photoelastic pressure sensor and a polarization analyzer. The wavelength for which the output light has an intensity minimum is a measure of the applied pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.