Abstract: A photoelectric switching apparatus comprises: a light projecting device; a photo sensing device; an objective lens having a double structure comprising an outer peripheral portion and a central portion each of which acts as a lens; and a reflecting surface to deflect the lights on the optical axis of the central portion of the objective lens to the side. An elongated portion which extends on the optical axis of the central portion of the objective lens and has the reflecting surface at the end portion thereof is formed integrally with the objective lens.

Abstract: A reflection type photoelectric switch adapted to project light to an object to be detected and sense the object on the basis of reflected light therefrom, which comprises a split-type composite light receiving unit consisting of two light receiving segments, a differential amplifer receiving the outputs of the two light receiving segments, and a waveform shaping device for discriminating the differential amplification output of the differential amplifier with a predetermined level and generating a detection output for the object.