Optoelectronic sensor device for a motor vehicle
US7414237B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Dec 18, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60S1/0833
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.