Patent ID: 6528808
Filing Date: 2003-03-04
Classification: G01D,H01L

Abstract:
A multiple transmission-type photoelectric sensor in which a plurality of sensing arms are provided in spaced-apart relation on a sensor case so as to extend outwardly of the case, comprising:a plurality of light-projecting elements and a plurality of photoreceptor elements are provided inside the sensor case; one pair of the light-projecting and photoreceptor elements correspond to each sensing arm; and a distal end of each sensing arm is provided with a first deflecting member for directing projected light from the corresponding light-projecting element toward a neighboring sensing arm on one side, a second deflecting member for directing projected light from the neighboring sensing arm on one side toward the corresponding photoreceptor element, and a third deflecting member for returning the projected light from a neighboring sensing arm on the other side to the neighboring sensing arm on the other side.