公开(公告)号：US09678010B2

公开(公告)日：2017-06-13

申请号：US14317070

申请日：2014-06-27

Applicant: MSA TECHNOLOGY, LLC.

Inventor： Christopher D. Starta ,  Robert E. Uber ,  Thomas Trautzsch ,  Frederick J. Schuler

IPC: G01N21/3504 ,  G01N21/59 ,  G01N21/31

CPC classification number: G01N21/59 ,  G01N21/3151 ,  G01N21/3504 ,  G01N2201/023 ,  G01N2201/0636 ,  G01N2201/0662

Abstract: A closed path infrared sensor includes an enclosure, a first energy source within the enclosure, at least a second energy source within the enclosure, at least one detector system within the enclosure and a mirror system external to the enclosure and spaced from the enclosure. The mirror system reflects energy from the first energy source to the at least one detector system via a first analytical path and reflects energy from the second energy source to the at least one detector system via a second analytical path. Each of the first analytical path and the second analytical path are less than two feet in length.