Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1993-05-21
1995-09-05
Dzierzynski, Paul M.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033907, 364498, G01J 302
Patent
active
054480701
ABSTRACT:
A method and apparatus for identifying an unknown gas by generating an infrared spectrum of the unknown gas using an infrared spectrophotometer that includes a circular variable interference filter, compressing the infrared spectrum of the unknown gas, and comparing the compressed infrared spectrum of the unknown gas to a library of compressed infrared spectra of reference compounds. After comparison, the compressed spectra that most closely match the unknown gas are decompressed and displayed. Because frequency characteristics of circular variable interference filters vary from filter to filter, information designating these frequency characteristics for the particular filter employed are used in generating the infrared spectrum of the unknown gas.
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patent: 5311445 (1994-05-01), White
G. Hangac et al., "Compression of an Infrared Spectral Library by Karhunen-Loeve Transformation", Applied Spectroscopy, vol. 26, No. 1, 1982.
Day Stephen
Swarna Kailash
Bruce David Vernon
Dzierzynski Paul M.
The Foxboro Company
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