| 摘要 |
PURPOSE: A photo electric sensor is provided to prevent the degrading of detection precision degree due to the reflecting light of the surface of sensing target object. CONSTITUTION: A photo electric sensor comprises a light projector(1), a light receiving device(2), a signal processing member and a photo electronic sensor. The light projector irradiates light to the detection target area of an object. The light receiving device receives the light from the light projector. A signal processing member outputs a signal indicating the purport of detecting object. The photo electronic sensor has two optical filters which penetrates only light having the special property between the light projector and light receiving device. |
