Optical seismic detector
US4792931A · kind A · utility
17Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1986 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Sep 23, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector for detecting the acceleration, the velocity or the displacement of a point is described. The detector includes a light source, at least two photoelectric elements spaced apart from each other over a predetermined distance and a focusing optical system disposed between the light source and the photoelectric elements; the combination being particularly suited for use as an optical seismic detector for detecting and mapping an underground stratum structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.