The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2008
Filed:
Dec. 18, 2006
Matthias Richwin, Dortmund, DE;
Thomas Weber, Ludenscheid, DE;
Matthias Richwin, Dortmund, DE;
Thomas Weber, Ludenscheid, DE;
Leopold Kostal GmbH & Co. KG, Ludenscheid, DE;
Abstract
A sensor for detecting moisture on a pane includes a coupler having prisms arranged in coupling areas for coupling light from a transmitter into the pane at an input angle and prisms arranged in decoupling areas for decoupling light reflected from the pane to a receiver at a corresponding output angle. The prisms in the coupling areas have prism surfaces perpendicular to the input angle and the prisms in the decoupling areas have prism surfaces perpendicular to the output angle. Each prism includes a prism flank. The prism flanks in the decoupling areas may be arranged parallel to the output angle. Some of the prism flanks in the decoupling areas are opaque or roughened. Alternatively, some of the prism flanks in the decoupling areas are tilted from running parallel to the output angle. Alternatively, some of the prism flanks in the decoupling areas include at least one additional superimposed prism.