Patent ID: 9201144
Filing Date: 2015-12-01
Classification: G01J,G01S

Abstract:
1. An active object detection sensor that operates to form a detection area by a transmission area and a reception area each having a plurality of division areas, and detect an object in the detection area, the active object detection sensor comprising: a plurality of transmitter elements each configured to transmit a detection ray for object detection, to the transmission area; a plurality of receiver elements each configured to receive the detection ray reflected by the object in the reception area; and a transmission-side optical divider and a reception-side optical divider, disposed in front of the transmitter elements and the receiver elements, respectively, wherein each optical divider includes a plurality of optical dividing pieces having a plurality of optical deflection surfaces on which an angle of traveling direction of the detection ray is varied to a plurality of angles so as to correspond to the plurality of the division areas, and wherein each of the optical dividing pieces has a first optical deflection surface and a second optical deflection surface, a ratio of an area of the second optical deflection surface forming a division area that is closer to the sensor, relative to an area of the first optical deflection surface forming a division area that is farther from the sensor, being set so as to be different between a transmission side and a reception side.