| 摘要 |
<p>Transmitter elements (3) to transmit a detection ray for object detection, to a transmission area (TA), receiver elements (4) to receive, from a reception area (RA), the detection ray reflected by an object, and a transmission-side optical divider (7) and a reception-side optical divider (8), disposed in front of the transmitter elements (3) and the receiver elements (4), respectively, which includes optical dividing pieces (7S), (8S) having optical deflection surfaces (7a), (7b), (8a), (8b) on which a traveling direction angle of the detection ray is varied to angles so as to correspond to division areas, are provided. In the optical dividers, a ratio of an area of a second optical deflection surface (7b), (8b) that forms a division area that is closer to the sensor, relative to an area of a first optical deflection surface (7a), (8a) that forms a division area that is farther from the sensor, is set so as to be different between a transmission side and a reception side.</p> |
