Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-05-12
1990-01-02
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, G01J 350
Patent
active
048915092
ABSTRACT:
An apparatus for determining displacement of an object, comprises a light source which propagates a polychromatic light signal along a patch to a detector, the detector being capable of detecting the intensity of incident radiation at a plurality of different wavelengths, and a radiaiton modulation means mechanically coupled to said object for movement therewith, displacement of the object being arranged to cause displacement of the radiation modulating means in said path such as to vary the distributed spectral content of the light reaching the detector.
In one embodiment the radiation modulation means comprises a filter which attenuates the intensity of transmitted wavelengths to different degrees and which is mechanically coupled to said object such that movement of the object displaces the filter so as to vary the extent to which the filter interceps the radiation signal propagated by said light source.
REFERENCES:
patent: 4165180 (1979-08-01), Failes
patent: 4408123 (1983-10-01), Sichling et al.
patent: 4427881 (1984-01-01), Ruell
patent: 4517456 (1985-05-01), Halsall et al.
patent: 4543961 (1985-10-01), Brown
patent: 4547074 (1985-10-01), Hinoda et al.
patent: 4761551 (1988-08-01), Edwards et al.
patent: 4778988 (1988-10-01), Henderson
patent: 4814601 (1989-03-01), Jones
patent: 4835384 (1989-03-01), Jones et al.
Jones Gordon R.
Moruzzi James L.
Prasad Akkanapragada N.
Allen Stephone B.
Nelms David C.
The University of Liverpool
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