DEVICE FOR MONITORING THE STATE OF A WINDOW PANE

摘要

The invention relates to a device for monitoring the state of a window pane. The inventive device comprises an optical emitter (10, 11) which emits a light beam up to the window pane. The inventive device also contains an optical receiver (15) which detects light of the light beam modulated by the window pane and, as a result, generates a received signal. The emitter and the receiver are arranged at a distance from the window pane. An evaluation circuit evaluates the received signal in order to determine the state of the window pane.