Optical train for measuring angle or position with transmission by intrinsically linear and referenced optical fibers using one or more light sources
US5087811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A referenced optical chain for measuring angle or position, using transmission by optical fibers. The device comprises a measuring head (29) receiving two light waves transported by a supply optical fiber (28); at the measuring head (29), the incident light beams are collimated (33) then intercepted by an assembly comprising a fixed diaphragm (34) and a movable filter (35) intercepting one of the two light waves; this assembly constitutes the measuring system itself; the resultant light signals are then refocussed and coupled to an optical return fiber which transports the signals toward a photodetector. The measurement is linear and the measuring chain is referenced in all of the embodiments of the invention. The device may be used in any application which requires a measurement of angle or position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.