Optical sensor system for detecting e.g. hand in detection area that contains circular saw blade of desk circular saw, has free molded surfaces formed such that measuring points illuminated by light beams are imaged in sensing element

摘要

The system (1) has a receiver optic provided between a projection surface (2) and a line sensor (13) in an optical path of receiving light beams (12), where the receiver optic has optical boundary surfaces (18, 19) formed as free molded surfaces. The free molded surfaces of the receiver optic are formed such that three measuring points (20a-20c) of the projection surface illuminated by the light beams are imaged in a sensing element (14) of the line sensor, where the measuring points are not arranged in a common plane that runs through imaging optics.