螺旋状光投射型近接センサ

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  • Proximity Sensor by Using a Spiral-Light Emitting Mechanism
  • ラセンジョウ ヒカリ トウシャガタ キンセツ センサ

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A newly developped proximity sensor by using a spiral-light emitting mechanism is described, A light coming from a point source of light through a slit which is bored on a circular disk becomes spiral while the disk is rotated cyclically by a motor. The spirallight emitting mechanism makes it possible to measure a distance of an object continuously since the distance is determined by measuring a repetitive time when a reflected light comes from the object to an photodiode. Design of a slit profile is discussed to make the signal processing simple. The experimental results are shown to prove the usefulness of the profile.<br>This sensor is characterized by the fact that the distance measurement is not affected by the attributes of the object like a diffusibility or reflexibility.

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