Optical sensor device
First Claim
1. An optical sensor device adapted to be coupled to a window pane, in particular to a windshield of a motor vehicle, comprising a sensor unit which includes a light transmitter, a light receiver and a lens plate for coupling a beam of light emitted by the light transmitter into the window pane, coupling the beam out of the window pane and directing the beam onto the light receiver, wherein the lens plate has a surface facing the light transmitter and the light receiver and provided with Fresnel lens structures, and an opposite surface facing the window pane and provided with Fresnel reflector structures.
1 Assignment
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Accused Products
Abstract
An optical sensor device has a sensor unit, which includes a light transmitter, a light receiver and a lens plate, with which a beam of light emitted by the light transmitter is coupled into the window pane, coupled out of the window pane and directed onto the light receiver. On its surface facing the light transmitter and the light receiver, the lens plate includes Fresnel lens structures, and on the opposite surface facing the window pane it includes Fresnel reflector structures. This embodiment is particularly useful as rain sensor. Without light transmitter, the sensor device can be used as a light sensor.
18 Citations
30 Claims
- 1. An optical sensor device adapted to be coupled to a window pane, in particular to a windshield of a motor vehicle, comprising a sensor unit which includes a light transmitter, a light receiver and a lens plate for coupling a beam of light emitted by the light transmitter into the window pane, coupling the beam out of the window pane and directing the beam onto the light receiver, wherein the lens plate has a surface facing the light transmitter and the light receiver and provided with Fresnel lens structures, and an opposite surface facing the window pane and provided with Fresnel reflector structures.
- 16. An optical sensor device adapted to be coupled to a window pane, in particular to a windshield of a motor vehicle, comprising a sensor unit which includes a light receiver and a lens plate for coupling a beam of light impinging on the window pane out of the window pane and directing the beam onto the light receiver, wherein the lens plate has a surface facing the light receiver and provided with Fresnel lens structures, and an opposite surface facing the window pane and provided with Fresnel reflector structures.
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30. A combined rain/light sensor, comprising
(i) a first optical sensor device adapted to be coupled to a window pane, in particular to a windshield of a motor vehicle, comprising a sensor unit which includes a light transmitter, a light receiver and a lens plate for coupling a beam of light emitted by the light transmitter into the window pane, coupling the beam out of the window pane and directing the beam onto the light receiver, wherein the lens plate has a surface facing the light transmitter and the light receiver and provided with Fresnel lens structures, and an opposite surface facing the window pane and provided with Fresnel reflector structures; - and
(ii) a second optical sensor device adapted to be coupled to a window pane, in particular to a windshield of a motor vehicle, comprising a sensor unit which includes a light receiver and a lens plate for coupling a beam of light impinging on the window pane out of the window pane and directing the beam onto the light receiver, wherein the lens plate has a surface facing the light receiver and provided with Fresnel lens structures, and an opposite surface facing the window pane and provided with Fresnel reflector structures.
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Specification