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US 8,785,837 B2Granted
Photoelectric barrier apparatus
AssigneeBalluff GmbH
InventorsStefan Hilsenbeck, Alexander Forkl
Life of this patent
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Abstract
A photoelectric barrier apparatus is provided, which comprises a transmitting device for light, a reflecting device and a receiving device for reflected light with at least one photodetector, wherein the at least one photodetector is arranged at an acute angle to an optical axis, wherein the at least one photodetector has a receiving face for light and the acute angle lies between the optical axis and a normal of the receiving face.
Claims16
Photoelectric barrier apparatus comprising:
- a transmitting device for light;
- a reflecting device;
- and
- a receiving device for reflected light with at least one photodetector;
- wherein:
- the at least one photodetector is arranged at an acute angle to an optical axis;
- the at least one photodetector has a receiving face for light and the acute angle lies between the optical axis and a normal of the receiving face;
- the acute angle is the Brewster angle in relation to a medium, in which the at least one photodetector is arranged, and a light-transitive material of the at least one photodetector, or the acute angle lies close to the Brewster angle.
5 more elements
Dependencies are inferred from the claim text.