Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-01-11
1998-02-24
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503385, 250343, G01N 2135, G01N 2161
Patent
active
057214301
ABSTRACT:
Multichannel infrared detector assemblies for use in the detection and monitoring of gas concentrations are provided. The detector assemblies include a detector housing having a port for receiving infrared radiation therethrough; a substrate mounted within the detector housing, the substrate having three apertures therein to transmit radiation entering the detector assembly therethrough; a first, a second and a third thermopile detector fabricated on the bottom side of the substrate, the hot junctions of each thermopile detector positioned over one of the apertures in the substrate so as to receive radiation transmitted through the aperture, and the cold junctions of each thermopile detector positioned over the substrate; a first interference bandpass filter mounted on the top side of the substrate so that the first filter covers the aperture above the first detector and the first filter is interposed between the port and the first detector, the first interference bandpass filter designed to pass incident radiation at a first spectral band; a second interference bandpass filter mounted on the top side of the substrate so that the second filter covers the aperture above the second detector and the second filter is interposed between the port and the second detector, the second interference bandpass filter designed to pass radiation at a second spectral band; and a third interference bandpass filter mounted on the top side of the substrate so that the third filter covers the aperture above the third detector and the third filter is interposed between the port and the third detector, the third interference bandpass filter designed to pass radiation at a third spectral band. The disclosed infrared detector assemblies can be used in traditional NDIR gas sensors having an active source or in passive infrared analysis gas sensors which use a passive infrared temperature source and the space between the detector assembly and the source as the sample chamber.
REFERENCES:
patent: 3032655 (1962-05-01), Romans
patent: 3662171 (1972-05-01), Brengman et al.
patent: 3793525 (1974-02-01), Burch et al.
patent: 3811776 (1974-05-01), Blau, Jr.
patent: 4456919 (1984-06-01), Tomita et al.
patent: 4500207 (1985-02-01), Maiden
patent: 4520265 (1985-05-01), Griggs et al.
patent: 4527896 (1985-07-01), Irani et al.
patent: 4578762 (1986-03-01), Wong
patent: 4694173 (1987-09-01), Wong
patent: 4709150 (1987-11-01), Burough et al.
patent: 4722612 (1988-02-01), Junkert et al.
patent: 4765752 (1988-08-01), Beynon et al.
patent: 4772790 (1988-09-01), Aldridge
patent: 4790324 (1988-12-01), O'Hara et al.
patent: 4980847 (1990-12-01), Hirano
patent: 5026992 (1991-06-01), Wong
patent: 5041723 (1991-08-01), Ishida et al.
patent: 5060508 (1991-10-01), Wong
patent: 5095913 (1992-03-01), Yelderman et al.
patent: 5100479 (1992-03-01), Wise et al.
patent: 5163332 (1992-11-01), Wong
patent: 5165796 (1992-11-01), Gat et al.
patent: 5186541 (1993-02-01), Paulk
patent: 5222389 (1993-06-01), Wong
patent: 5326173 (1994-07-01), Evans et al.
patent: 5340986 (1994-08-01), Wong
patent: 5444249 (1995-08-01), Wong
Brochure dated Jun. 16, 1993 regarding OAI MIR-100 Thermopile (2 pgs.).
Thermopile MIR-100 Line Catalog Book (6 pgs.).
ARMTEC Industries, Inc. brochure regarding Northwoods PS-20 dector (2 pgs.) (undated).
Action et al., AIAA Journal, vol. 11, No. 7 (Jul. 1973), pp. 899-900 (Article entitled "Remote Measurement of Carbon Monoxide by a Gas Filter Correlation Instrument").
Engelhard Sensor Technologies Inc.
Fields Carolyn E.
LandOfFree
Passive and active infrared analysis gas sensors and applicable does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passive and active infrared analysis gas sensors and applicable , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive and active infrared analysis gas sensors and applicable will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1876627