Optoelectronic sensor for measuring the amount of moisture on the transparentwindscreen of a motor vehicle

An optoelectronic sensor device for the detection of the degree of wetting of a transparent vehicle screen with precipitation, includes a beam guide with two opposing parallel surfaces and two surfaces which lie opposite to one another and which are angled in opposing fashion through which beams ent...

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Bibliographic Details
Main Authors ESDERS, BERTHOLD, BENDICKS, NORBERT
Format Patent
LanguageEnglish
French
German
Published 04.11.1998
Edition6
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PERFORMING OPERATIONS
PHYSICS
SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, ORMANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
TESTING
TRANSPORTING
VEHICLES IN GENERAL
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Summary:An optoelectronic sensor device for the detection of the degree of wetting of a transparent vehicle screen with precipitation, includes a beam guide with two opposing parallel surfaces and two surfaces which lie opposite to one another and which are angled in opposing fashion through which beams enter and exit, one of the parallel surfaces being coupled to the vehicle screen in an optical fashion, the beam entry surface cooperating with an optical transmitter and the exit surface cooperating with an optical receiver. The device limits the wavelength of rays which exit from the beam guide to the operating range of the beam transmitter. Two filters (4) are incorporated in the beam path whose pass ranges overlap within a narrow frequency band.
Bibliography:Application Number: EP19950109797