Apparatus and method for detecting movement of an object
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United States of America Patent
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Apr 18, 1989
Grant Date -
N/A
app pub date -
Apr 29, 1987
filing date -
May 1, 1986
priority date (Note) -
Expired
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Abstract
The movement of a body (1) is determined by mounting on or in the body one or more sources (3,4) and one or more detectors (12,14) such that each source propagates polychromatic light along a path to a detector. Radiation modulation means (19;25) is supported by the body such that a change in the movement of the body causes a displacement of the radiation modulation means in at least one light path to vary the distributed spectral content of the light reaching the detector. The or each detector is adapted to detect the intensity of incident radiation at a plurality of different wavelengths, and analysis means (18) interprets the output of each detector in terms of the movement of the body.
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