Infrared ray detector with multiple optical filters

Details Infrared ray detector with multiple optical filters Infrared ray detector with multiple optical filters

1990-09-28

1991-08-20

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, 250352, G01N 2161

Patent

active

050417231

ABSTRACT:
An infrared ray detector assembly for detecting a plurality of components such as hydrocarbons, CO.sub.2 and CO gases includes a housing member having a hollow interior and a portion transmissible to infrared rays and a holder member mounted within the hollow interior and having a plurality of separate compartments. An infrared detector is mounted in each compartment, and an optical filter is mounted over each compartment, abutting adjacent filters to respectively limit the wavelength band to each infrared detector, each optical filter having a substrate of approximately the same material and thickness.

REFERENCES:
patent: 4678914 (1987-07-01), Melrose et al.
patent: 4771176 (1988-09-01), Scheifer et al.
patent: 4914719 (1990-04-01), Conlon et al.

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