Optical information reproducing apparatus for detecting track crossing direction and track crossing number from reflected light extending over a plurality of tracks

摘要

An optical information reproducing apparatus has an optical detector consisting of at least two light detecting elements receiving reflected light reflected from a beam spot portion extending over a plurality of tracks on an optical recording medium in which a plurality of tracks are provided parallel with each other. Two signals having different phases are produced in accordance with a direction in which the beam spot crosses a track based on the output of this optical detector, so that a track crossing direction is detected without being affected by dust or the like. Also, the number of crossing tracks is detected.