Patent Number: 6,311,005

Title: Sensor device for determining the degree of wetting and/or soiling on window panes

Abstract: A sensor device for determining the degree of wetting and/or soiling of a pane in a motor vehicle is provided. The sensor device detects the coating of moisture on the outer side of the pane via an optical beam which is arranged in the area of the pane. The sensor device includes a reflector positioned in the pane, the reflector directing the beam through the pane under conditions of total reflection or reflection at the outer side of the pane and at the reflector. The pane additionally includes a light filter which absorbs a selected wavelength of sunlight. The attenuation is reduced via an optically more absorbent layer of the light filter.

Inventors: Pientka; Rainer (Achern, DE), Meier; Hans (Ottersweier, DE), Schabanel; Francois (Saint Maux des Fosses, FR)

Assignee: Robert Bosch GmbH

International Classification: B60S 1/08 (20060101); G01N 21/41 (20060101); G01N 21/43 (20060101); H04N 005/84 ()

Expiration Date: 10/30/2018