Optical sensor device for detecting wetting
First Claim
1. An optical sensor device which is configured to be coupled to a window, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a diverging light beam emitted by the emitter is coupled into the window, coupled out of the window and directed and completely focused onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions.
1 Assignment
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Accused Products
Abstract
An optical sensor device (10) is able to be coupled to a window (14), in particular to a windscreen of a motor vehicle. The optical sensor device (10) comprises a sensor unit (12), which includes a emitter (26), a receiver (28) and a light conductor unit (30). By the light conductor unit (30), a light beam (34) emitted by the emitter (26) is coupled into the window (14), coupled out of the window (14) and directed onto the receiver (28). The light conductor unit (30) includes Fresnel lens regions and associated reflecting regions.
149 Citations
24 Claims
- 1. An optical sensor device which is configured to be coupled to a window, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a diverging light beam emitted by the emitter is coupled into the window, coupled out of the window and directed and completely focused onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions.
- 3. An optical sensor device which is configured to be coupled to a window, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a light beam emitted by the emitter is coupled into the window, coupled out of the window and directed onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions, wherein the Fresnel lens regions and the reflecting regions are formed in a stepped structure of the light conductor unit, said stepped structure including an input portion with a plurality of steps, at least two of said steps having an input surface shaped in the manner of an aspherical Fresnel lens and a reflecting surface associated with the input surface, said stepped structure including an output portion with a plurality of steps, at least two of said steps of said output portion having an output surface shaped in the manner of an aspherical Fresnel lens and a reflecting surface associated with the output surface.
- 6. An optical sensor device which is configured to be coupled to a window, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a light beam emitted by the emitter is coupled into the window, coupled out of the window and directed onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions, wherein between the individual Fresnel lens regions and the associated reflecting regions diverting regions are provided, the diverting regions having a refractive or reflective structure such that light impinging on the diverting regions is diverted in a direction which does not impair the function of the optical sensor device.
- 16. An optical sensor device which is configured to be coupled to a window, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a light beam emitted by the emitter is coupled into the window, coupled out of the window and directed onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions, wherein in a housing of the sensor device at least one additional daylight sensor unit is accommodated, the daylight sensor unit including a light receiver and a light conductor unit which maps light from a defined region of the surroundings on the light receiver.
- 19. A method of producing an optical sensor device, the optical sensor device comprising a sensor unit which includes an emitter, a receiver and a light conductor unit, the light conductor unit being configured such that a light beam emitted by the emitter is coupled into the window, coupled out of the window and directed onto the receiver, the light conductor unit including Fresnel lens regions and reflecting regions associated to the Fresnel lens regions, the method comprising the step of forming the light conductor unit by embossing a plate.
Specification