Optical sensing apparatus and method
US4342907A · kind A · utility
91Cited by
7References
54Claims
0Family size
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Key dates
| Filing date | Feb 1, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Feb 1, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S177/06
- 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.