Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1997-10-03
1999-07-20
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
G01N 2161
Patent
active
059258810
ABSTRACT:
A measuring cell (1) for the analysis of a gas sample by infrared absorption, with a measuring path (2) accommodating the gas sample, which has opposite limiting surfaces (7, 9) enclosing the gas sample, wherein a focusing optical component (8) is present at the first limiting surface (7) and an infrared radiation source and a radiation receiver (4) are arranged in the area of the second limiting surface (9) such that a measuring beam (13) emitted by the radiation source (3) is directed onto the radiation receiver (4) through the optical component, shall be improved such that it be suitable for the detection of gases with a long absorption path. A mirror surface (12) active for the measuring path (2) is present in the area of the second limiting surface (9), and the geometry of the optical component (8) is dimensioned such that there is an at least fourfold pass of the measuring beam (13) in the measuring path (2), utilizing the reflection of the beam on the mirror surface (12).
REFERENCES:
patent: 4358679 (1982-11-01), Lipoma
patent: 5341214 (1994-08-01), Wong
patent: 5550375 (1996-08-01), Peters et al.
patent: 5625189 (1997-04-01), McCaul et al.
Dragerwerk AG
Hannaher Constantine
Israel Andrew
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