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:
May. 19, 1981
Filed:
May. 21, 1979
Applicant:
Inventors:
Thomas Herwig, Eltville, DE;
Gerhard Doenges, Taunusstein, DE;
Assignee:
Heimann GmbH, , DE;
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250353 ; 250342 ; 250347 ;
Abstract
An optical arrangement for a passive infrared motion detector which has an infrared detector unit and a system for directing infrared radiation from at least two separate directions to be monitored onto the detector unit characterized by the system including a single focusing device and separate, flat reflecting surfaces or directing mirrors, which are arranged with at least one flat reflecting surface associated with each direction to be monitored to reflect a beam or solid angle of radiation from the direction onto the single focusing device which device will focus the radiation along a folded beam path to the detector unit.