Uncooled infrared sensors for the detection and identification o

Details Uncooled infrared sensors for the detection and identification o Uncooled infrared sensors for the detection and identification o

1997-04-01

1999-09-28

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

25037013, 25033915, 25033901, 25033902, 25033913, H01L 310296

Patent

active

059592990

ABSTRACT:
This is a sensor for, and a method of, determining if a particular type of flame is present, using at least two uncooled HgCdTe detector films on a common IR transmissive substrate. Specific examples of the types of radiation which can be identified include gasoline flames, natural gas flames, and organic combustion flames (identified, e.g., by comparing the amount of combined carbon dioxide and carbon monoxide to the amount of water vapor). The ratio of carbon dioxide to carbon monoxide can also be determined. The sensor can include a first HgCdTe filter (88) on a common IR transmissive substrate (42), a first uncooled HgCdTe detector film (86) over the first filter (88), and a second uncooled HgCdTe detector film (92) on a CdTe insulator which is either on the first uncooled HgCdTe detector film, or on a second HgCdTe filter (94) provided on the common IR transmissive substrate.

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