Optical sensing apparatus and method
US4443700A · kind A · utility
90Cited by
4References
11Claims
0Family size
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Key dates
| Filing date | May 13, 1982 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | May 13, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor for measuring stress, temperature, pressure, sound, etc. comprising an optical waveguide, preferably an optical fiber waveguide, a light source which injects light into one end of the waveguide, a deformer contacting and deforming the waveguide to cause light to couple from originally excited modes to other modes, and an optical detector to detect the change in light coupling caused by deformation of the waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.