Patent · US Expired

Warm light reflector

US4199218A · kind A · utility

9Cited by

3References

3Claims

0Family size

Assignee

Heimann GmbH · DE

Inventors

Peter-Wilhelm Steinhage · Wiesbaden, DE
Claus Kunze · Taunusstein, DE

Key dates

Filing date	Jul 13, 1978
Grant date	Apr 22, 1980
Priority date	—
Expiry date	Jul 13, 1998

Classification

Technology area (CPC G)Physics
CPC primaryG08B13/193
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.