| 摘要 |
The purpose of the present invention is to provide a photosensor unit which has a simple structure and does not reduce detection accuracy. This photosensor unit comprises light-emitting elements (1) and a light-receiving element (2) housed in a unit case (3); detection light is projected from the light-emitting elements (1) to outside of the unit case (3), and the light reflected back from outside of the unit case (3) is detected by means of the light-receiving element (2), wherein multiple light-emitting elements (1) are arranged around the light-receiving element (2), and a suitable dividing wall (4) divides the space inside of the unit case (3) through which the reflected light passes from the space through which the detection light passes. |
