Optical sensor

摘要

The sensor (1) has a transmitting/receiving unit (6) arranged inside a housing (3) and rotatable around a rotational axis (D). The transmitting/receiving unit includes a transmitter i.e. laser diode, to emit transmitted light rays (7) and a receiver i.e. photodiode, to receive received light rays (9). The transmitted and received light rays are guided through a window (12) in the housing. The window forms an optical unit for beam shaping of the transmitted light rays and the received light rays. A reference object (17) i.e. partially transparent object, is arranged at the window.