Optical sensor device
First Claim
1. An optical sensor device which is able to be coupled to a pane, particularly to a windscreen of a motor vehicle, the device comprising a sensor unit including a transmitter, a receiver and a photoconductor structure having a first fresnel lens associated with the transmitter and a second fresnel lens associated with the receiver, the fresnel lenses being arranged such that a diverging light beam emitted from the transmitter is oriented in parallel through the first fresnel lens and is coupled into the pane as a parallel light beam without further substantial deflection, the parallel light beam being coupled out from the pane as a parallel light beam after at least one reflection inside the pane, the light beam impinging onto the receiver as a converging light beam through the second fresnel lens.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical sensor device (10, 10′) is able to be coupled to a pane (14), particularly to a windscreen of a motor vehicle. A sensor unit (12) of the device (10, 10′) has a transmitter (26), a receiver (28) and a photoconductor structure with a first fresnel lens (42) associated with the transmitter (26) and a second fresnel lens (44) associated with the receiver (28). The fresnel lenses (42, 44) are arranged such that a diverging light beam (34) emitted from the transmitter (26) is oriented in parallel through the first fresnel lens (42) and is coupled into the pane (14) as a parallel light beam (34a) without further substantial deflection. The parallel light beam (34a) is coupled out from the pane (14) as a parallel light beam (34b) after at least one reflection inside the pane (14). The light beam (34b) impinges onto the receiver (28) as a converging light beam through the second fresnel lens (44).
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Citations
15 Claims
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1. An optical sensor device which is able to be coupled to a pane, particularly to a windscreen of a motor vehicle,
the device comprising a sensor unit including a transmitter, a receiver and a photoconductor structure having a first fresnel lens associated with the transmitter and a second fresnel lens associated with the receiver, the fresnel lenses being arranged such that a diverging light beam emitted from the transmitter is oriented in parallel through the first fresnel lens and is coupled into the pane as a parallel light beam without further substantial deflection, the parallel light beam being coupled out from the pane as a parallel light beam after at least one reflection inside the pane, the light beam impinging onto the receiver as a converging light beam through the second fresnel lens.
Specification