Seismic sensor with interferometric sensing apparatus
US6195162A · kind A · utility
48Cited by
12References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Oct 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B9/0209
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An interferometric sensor includes a broadband optical source, a depolarizer for depolarizing optical radiation emitted by the broadband optical source, a matched interferometer, a sensing interferometer, and a detector. The matched interferometer contains a phase modulator. The sensor is configured so that the optical path length difference in the sensing interferometer is approximately equal to the optical path length difference in the matched interferometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.