The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2017
Filed:
Oct. 23, 2014
Sick Ag, Waldkirch, DE;
Johannes Eble, Waldkirch, DE;
SICK AG, Waldkrich, DE;
Abstract
The invention relates to a light grid having divergent light beams so that cross-beams can also be evaluated beside parallel beams, wherein not only a light beam interruption, but also the intensity of the light incidence on a light reception unit is evaluated. To provide an improved light grid with which in particular smaller objects can be detected and possibly also located, it is proposed that the light transmission units have a transmission optics in whose focus an extended light source is arranged. Furthermore, each beam contains an effective beam, with an effective beam being defined in that a part shading of this effective beam effects a measurable intensity change in the associated light receiver corresponding to the shading. Finally, the effective beams define at least one detection zone in the monitored plane, with an illumination by at least one effective beam being present in the total detection zone.