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Proceedings Paper

Compact interferometers for chemical and biological agent detection
Author(s): Christopher Manning; Michael Gross; Tim Hanshaw; R. Lynn Kirlin; Alan Samuels
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Paper Abstract

Manning Applied Technology is developing a series of compact and rugged interferometers with many applications, including chemical and biological agent detection. A nutating prism interferometer features high throughput, very rapid-scan capability and resistance to vibration. A novel multiplex Fabry-Perot interferometric spectrometer is especially compact and efficient, transferring about twice the modulated optical power to a detector, compared to a Michelson interferometer of equal volume. The bilithic interferometer features high throughput, intrinsic tilt compensation and compact size with the potential for high resolution measurements. For all of these interferometer geometries, digital signal processing (DSP) hardware and software are used to enhance the performance and allow rapid processing of data, including chemometric discrimination. Enhancements to system performance provided by DSP include application of Brault's data processing approach, frequency stabilization of a miniature solid state reference laser and computational correction of tilt errors. A key advantage of the DSP enhancements is compensation for non-ideal behavior of optical hardware. Many of the novel instruments described herein employ intrinsic optic tilt compensation. Either type of tilt compensation provides greater photometric accuracy and stability. Preliminary NESR characterization is reported for two of the instruments.

Paper Details

Date Published: 27 February 2004
PDF: 12 pages
Proc. SPIE 5268, Chemical and Biological Standoff Detection, (27 February 2004); doi: 10.1117/12.519193
Show Author Affiliations
Christopher Manning, Manning Applied Technologies, Inc. (United States)
Michael Gross, Manning Applied Technologies, Inc. (United States)
Tim Hanshaw, Hanshaw Consulting (United States)
R. Lynn Kirlin, Signal Processing Consultant (United States)
Alan Samuels, U.S. Army Edgewood Chemical Biological Ctr. (United States)

Published in SPIE Proceedings Vol. 5268:
Chemical and Biological Standoff Detection
James O. Jensen; Jean-Marc Theriault, Editor(s)

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