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Optical Engineering

Spectral Correlator Technologies
Author(s): D. Frankel; M. Camac; H. J. Caulfield; C. Gozewski; C. E. Kolb
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Paper Abstract

A spatial filter spectral correlation method capable of distinguishing spectral absorption features due to a target trace gas from interfering absorption features of another gas has been developed. This technique was demonstrated for trace detection of gaseous formaldehyde in the 3.5 µm spectral region in the presence of large and variable amounts of interfering water vapor. The demonstrated success of this spectral correlator method will allow the routine detection and logging of formaldehyde levels of 10 to 100 ppb in indoor environments.

Paper Details

Date Published: 1 December 1985
PDF: 8 pages
Opt. Eng. 24(6) doi: 10.1117/12.7973616
Published in: Optical Engineering Volume 24, Issue 6
Show Author Affiliations
D. Frankel, Aerodyne Research, Inc. (United States)
M. Camac, Aerodyne Research, Inc. (United States)
H. J. Caulfield, Aerodyne Research, Inc. (United States)
C. Gozewski, Aerodyne Research, Inc. (United States)
C. E. Kolb, Aerodyne Research, Inc. (United States)


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