Fiber optic probe sensor for measuring target displacement
US5017772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optic probe sensor for accurate measurement of displacement of a target over very small distances is disclosed. The probe sensor is comprised of plurality of light emitting fibers exclusively occupying a central region and connected to a light source for illuminating the target; a first and second plurality of light receiving fibers arrayed in two concentric regions exterior to and at two different distances from the central region, and means for measuring reflected light received from the target and for generating an output proportional to the light received and independent of target reflectivity or light source variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.