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. 14, 1997
Filed:
Nov. 07, 1994
Gunter Hofmann, Dresden, DE;
Manfred Zimmerhackl, Dresden, DE;
Volkmar Norkus, Dresden, DE;
Jens-Olaf Lang, Cossebaude, DE;
Rainer Rosch, Ludenscheid, DE;
Lothar Blomberg, Neuenrade, DE;
ABB Patent GmbH, Mannheim, DE;
Abstract
A device for receiving light beams, especially a PIR movement detector, includes a housing having at least one window in which lens segments, preferably Fresnel lenses, are disposed in such a way that horizontally incident light beams are focused as direct horizontal beams onto two light sensors. The two light sensors are mutually disposed in such a way that a usable sensor detection angle of the two light sensors is defined. In order to achieve an enlargement of the detection angle, at least one horizontal reflector is disposed in the vicinity of at least one of the light sensors, in such a way that the horizontal reflector detects further light beams from a horizontal angular region not covered by the light sensors with the usable detection angle, and these beams reach at least one of the light sensors as reflected horizontal beams. The lens segments surround the light sensors having the at least one horizontal reflector in a curve-shape to such an extent that they also focus horizontal beams which are incident outside the usable sensor detection angle.