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OwnerFrank Wolf, Vladislav Matusevich +3inventors
InventorsFrank Wolf, Vladislav Matusevich, Richard Kowarschik, Karim Haroud, Andreas Pack
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The invention relates to a rain sensor, especially for a motor vehicle, said sensor comprising an optical waveguide (22) which can be arranged in a windscreen. According to the invention, the planar holographic coupling elements for coupling and decoupling radiation (4) are formed from layered photo-polymer parts (3) into which volume holograms are integrated. The photo-polymer parts (3) are arranged between the core (1) of the waveguide and the envelope of the waveguide (2), resulting in a simple production method and an increased flexibility in terms of the arrangement of the waveguide (22) in the windscreen.
A rain sensor, for a motor vehicle in particular, with an optical waveguide that may be located in a pane, and which includes a waveguide core (1), a waveguide clad (2), and planar holographic coupling elements for coupling and decoupling radiation (4),
Dependencies are inferred from the claim text.