Optical train for measuring angle or position with transmission by intrinsically linear and referenced optical fibers using one or more light sources
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United States of America Patent
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Feb 11, 1992
Grant Date -
N/A
app pub date -
Mar 13, 1990
filing date -
Mar 13, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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