1
Gunter Hofmann, Manfred Zimmerhackl, Volkmar Norkus, Jens Olaf Lang, Rainer Rosch, Lothar Blomberg: Passive infrared sensor using a pair of sensors and reflectors for a 270 degree field of view. ABB Patent, Herbert L Lerner, Laurence A Greenberg, October 14, 1997: US05677529 (13 worldwide citation)

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. Th ...


2
Volkmar Norkus, Christian Schiewe, Frank Nagel: Multispectral sensor. ULTRAKUST electronic, Keck Mahin & Cate, April 5, 1994: US05300778 (11 worldwide citation)

The invention relates to a multispectral sensor with several filters and sensor elements for different spectral ranges of a radiation to be measured. The object of the invention is to so further develop a multispectral sensor of this type that it can be manufactured as a discrete component with smal ...