Optical fibre measuring system
US4974961A · kind A · utility
11Cited by
5References
9Claims
0Family size
Inventors
Key dates
| Filing date | Sep 10, 1987 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Sep 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29359
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optical fiber measuring systems using an interferometer are disclosed. The measuring range of the system are extended by the use two wavelengths of radiation during the measurement. The phases of the light at each wavelength may be compared, or the radiation of one wavelength may be used to calibrate the radiation of the other wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.