Fiber optical monitor for detecting motion based on changes in speckle patterns
US5212379A · kind A · utility
41Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Dec 6, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A motion monitor using coherent or partially coherent light passing through an optical fiber which is in contact or close to an object whose motion is to be monitored. An optical speckle pattern is formed near the output of the optical fiber which pattern changes as the fiber moves in response to the motion of the object being monitored. An optical detector monitors all or a part of the speckle pattern and electronically processes the optical detector's electrical output signals to derive information on the status of the object being monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.