Sensor device for recording moisture on a window and motor vehicle

摘要

With a sensor device for recording moisture on a window pane with a transmitter and a receiver and an optical unit arranged between the transmitter and the receiver, wherein the optical unit includes an optical input unit facing the transmitter, an optical output unit facing the receiver and a coupling-in and coupling-out region on the side of the window pane, the coupling-in and coupling-out region is optically separated from the optical input unit and the optical output unit such that the electromagnetic waves emitted by the transmitter are refracted. A particularly compact constructional design is achieved thereby.

主权项

1. A sensor device for recording moisture on a window pane with a transmitter and a receiver and an optical unit arranged between the transmitter and the receiver, wherein the optical unit comprises an optical input unit facing the transmitter, an optical output unit facing the receiver and a coupling-in and coupling-out region on the side of the window pane, wherein:
an air gap is arranged between the coupling-in and coupling-out region; the coupling-in and coupling-out region is optically separated from the optical input unit and the optical output unit in such a way that the electromagnetic waves emitted by the transmitter are refracted; the coupling-in and coupling-out region comprises a geometry different from the optical input unit; the side of the optical input unit facing the coupling-in and coupling-out region comprises a number of ramps rising in direction of the receiver when seen in cross-section; the coupling-in and coupling-out region comprises a surface structure triangular in cross-section; and each ramp of the optical input unit has a triangular structure of the coupling-in and coupling-out region associated with it.