Optical-fiber reference-value transmitter
US4848865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/264
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The optical-fiber reference-value transmitter comprises an optical waveguide coil with at least one winding layer, within which the sections of the optical waveguide fiber between adjacent turns are of equal length. A pressure finger which is connected to a mechanical distance pickup is guided over the layer of the winding and in the process exerts a mechanical pressure on a comparatively narrow zone of the optical waveguide fiber of a turn, whereby a so-called microbending effect is generated in the waveguide fiber. An opto-electronic transmitting and receiving apparatus which is connected to the optical waveguide fiber determines the location of the pressure point caused by the pressure finger and thereby, the position of the pressure finger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.