Fastening and coupling of an optoelectronic sensor to a pane and structure of the sensor

A sensor for optically detecting foreign bodies on a pane, said sensor including a transmitter and a receiver, which are coupled on the inside of the pane and detect foreign bodies on the outside of the pane in the region of a measurement path between the transmitter and the receiver;

• and, wherein:
• the sensor includes an outer housing part and an inner housing part as well as a fastening device that is glued to the pane;
• the functional elements of the sensor are held by the inner housing part, and a fastening means is mounted on the outer housing part and engages the fastening device in order to releasably secure the sensor to the pane;
• the inner housing part is pressed against the pane by the force of at least one spring which engages the outer housing part;
• pockets with a detent spring are provided on the outer housing part;
• and a respective said spring is inserted into each of these pockets so that it locks in detent fashion, and these springs, rest with pressure faces on one face of the inner housing part, and press the inner housing part forward toward the pane.