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:
Apr. 22, 1980
Filed:
Jul. 13, 1978
Applicant:
Inventors:
Peter-Wilhelm Steinhage, Wiesbaden, DE;
Claus Kunze, Taunusstein, DE;
Assignee:
Heimann GmbH, , DE;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350-17 ; 250504 ;
Abstract
The invention relates to a 'warm light reflector', which reflects infrared radiation and absorbs visible light. More specifically, a reflecting layer of, for example, gold carries a double layer of PbS, which is constructed of one smooth layer and of one fine-flocked layer of agglomerates. The disclosed warm light reflector finds particular application in infrared measurement technology, preferably in a passive infrared alarm generator.