Optical measuring unit with optical receiver and first measuring cell - has light wave conductor with which optical transmitter and optical receiver form transmitting and receiving system for transmitting bidirectional signals

摘要

The light signals are bidirectionally transmittable between the transmitting and receiving unit (1) and the first measurement cell (3) over the light wave conductor (2), and are reflected at a metallised side wall (322) of the first measurement cell (3). The side wall (322) with the reflecting surface has a concave curvature. The optical measuring unit has at least one second measurement cell (4, 5, 6) at the light wave conductor, and this measurement cell with a reflecting side wall is connected across a light wave coupler (41, 51, 61). The method for operating the optical measuring unit transmits light signals from the optical transmitter (11) through the light wave conductor (2) in to the first measurement cell (3), and these signals are reflected back from the cell to the optical receiver (12). ADVANTAGE - Ensures simpler operation.