DETECTORS AND ACTUATING DEVICES INCORPORATING SAME

摘要

A detector (100) for detecting the presence of an object (192) at a prescribed location (190), the detector comprising: an optical source (120) arranged for emitting a collimated optical beam towards the prescribed location; an optical detector (140) for detecting optical signals emitted by said optical source; an optical collector (160) arranged for collecting optical beams scattered by an object located at the prescribed location and for forwarding said optical beams to said optical detector for optical detection; and control circuit (180) for monitoring output of said optical detector and for determining the presence or absence of an object at said prescribed location by monitoring said output.