Optoelectronic sensor device for a motor vehicle
First Claim
1. A sensor for detecting moisture on a pane, the sensor comprising:
- a transmitter for transmitting optical radiation towards a pane;
a receiver for receiving optical radiation reflected from the pane;
a coupler having a plurality of prisms arranged in coupling areas for coupling optical radiation from the transmitter into the pane at a given input angle and a plurality of prisms arranged in decoupling areas for decoupling the optical radiation reflected from the pane out to the receiver at a corresponding given output angle, wherein the prisms arranged in the coupling areas have prism surfaces arranged perpendicular to the given input angle and the prisms arranged in the decoupling areas have prism surfaces arranged perpendicular to the given output angle;
wherein each prism includes a prism flank in addition to a prism surface, wherein the prism flanks of the prisms arranged in the decoupling areas are arranged parallel to the given output angle;
wherein at least some of the prism flanks of the prisms arranged in the decoupling areas are opaque.
1 Assignment
0 Petitions
Accused Products
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.
5 Citations
20 Claims
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1. A sensor for detecting moisture on a pane, the sensor comprising:
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a transmitter for transmitting optical radiation towards a pane;
a receiver for receiving optical radiation reflected from the pane;
a coupler having a plurality of prisms arranged in coupling areas for coupling optical radiation from the transmitter into the pane at a given input angle and a plurality of prisms arranged in decoupling areas for decoupling the optical radiation reflected from the pane out to the receiver at a corresponding given output angle, wherein the prisms arranged in the coupling areas have prism surfaces arranged perpendicular to the given input angle and the prisms arranged in the decoupling areas have prism surfaces arranged perpendicular to the given output angle;
wherein each prism includes a prism flank in addition to a prism surface, wherein the prism flanks of the prisms arranged in the decoupling areas are arranged parallel to the given output angle;
wherein at least some of the prism flanks of the prisms arranged in the decoupling areas are opaque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A sensor for detecting moisture on a pane, the sensor comprising:
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a transmitter for transmitting optical radiation towards a pane;
a receiver for receiving optical radiation reflected from the pane;
a coupler having a plurality of prisms arranged in coupling areas for coupling optical radiation from the transmitter into the pane at a given input angle and a plurality of prisms arranged in decoupling areas for decoupling the optical radiation reflected from the pane out to the receiver at a corresponding given output angle, wherein the prisms arranged in the coupling areas have prism surfaces arranged perpendicular to the given input angle and the prisms arranged in the decoupling areas have prism surfaces arranged perpendicular to the given output angle;
wherein each prism includes a prism flank in addition to a prism surface, wherein at least some of the prism flanks of the prisms arranged in the decoupling areas are tilted from running parallel to the given output angle. - View Dependent Claims (14, 15, 16, 17)
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18. A sensor for detecting moisture on a pane, the sensor comprising:
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a transmitter for transmitting optical radiation towards a pane;
a receiver for receiving optical radiation reflected from the pane;
a coupler having a plurality of prisms arranged in coupling areas for coupling optical radiation from the transmitter into the pane at a given input angle and a plurality of prisms arranged in decoupling areas for decoupling the optical radiation reflected from the pane out to the receiver at a corresponding given output angle, wherein the prisms arranged in the coupling areas have prism surfaces arranged perpendicular to the given input angle and the prisms arranged in the decoupling areas have prism surfaces arranged perpendicular to the given output angle;
wherein each prism includes a prism flank in addition to a prism surface, wherein the prism flanks of the prisms arranged in the decoupling areas are arranged parallel to the given output angle;
wherein at least some of the prism flanks of the prisms arranged in the decoupling areas include at least one additional prism superimposed on them. - View Dependent Claims (19, 20)
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Specification