Patent ID: 6091071
Filing Date: 2000-07-18
Classification: G01V

Abstract:
An opto-electronic sensor for recognizing transparent articles, the sensor comprising at least one transmitter for transmitting light signals into a monitored region, at least one receiver for receiving the transmitted light signals and also at least one evaluation unit for the evaluation of the received signals, whereinthe transmitter is designed for the transmission of light signals in the UV range,at least one reference transmitter is provided for the transmission of light signals into the monitored region,a reference receiver is provided for receiving the light signals transmitted by the reference transmitter,the evaluation unit includes a comparison unit for comparing the light signals received by the receiver and the reference receiver with each other; andthe light signals transmitted by the reference transmitter lie in a different frequency range from the light signals transmitted by the transmitter; andat least one of the transmitter and the reference transmitter is formed as a semiconductor element.