| 摘要 |
PROBLEM TO BE SOLVED: To prevent a malfunction by a simple configuration. ! SOLUTION: In a triangle ranging type distance sensor comprising: a light projection part 1a which projects light; a light receiving part 2a which receives light reflected by an object 50 to the light projected by the light projection part 1a; and a measurement part 5a which measures a distance from a self-machine to the object 50 on the basis of a light receiving result by the light receiving part 2a, it comprises: a first circular polarization filter 3a which is provided on a light projection face of the light projection part 1a, and transmits only a first circular polarization component of a specific rotation direction of incident light; and a second circular polarization filter 4a which is provided on a light receiving face of the light receiving part 2a, and transmits only a second circular polarization component which is in the same direction as the rotation direction of the first circular polarization component of the incid |
