Optical displacement sensor

Details Optical displacement sensor Optical displacement sensor

G - Physics

01

J

340/136

G01J 5/16 (2006.01) G01D 5/26 (2006.01) G01F 1/32 (2006.01) G01P 13/00 (2006.01)

Patent

CA 1292532

ABSTRACT OF THE DISCLOSURE The optical displacement sensor modulates intensity of the light beam as a function of the physical displacement. The sensor includes a reflector positioned in a path of the light beam between a slight source and a light detector . The reflector has a non-reflective portion surrounded by a reflective portion . Relative movement (displacement) of the beam and the reflector occurs as a function of a parameter which is being sensed. In a normal (no displacement) condition, the non-reflective portion can be positioned with respect to the light beam so that intensity of the light beam received by the detector is at a minimum, and the sensor is operating in a darkfield mode. Displacement from the normal position causes an increase in the light intensity received by the detector.

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