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8 May 2009 A new generation of dual input beam spectroradiometers for the standoff detection of chemicals
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A new generation of field-rated optical subtraction instruments for the standoff detection of chemicals will be presented. It combines the latest ABB Bomem spectroradiometer technology and software with the concepts used in the design of the original instrument designed and manufactured more than 12 years ago by ABB and Defence Research and Development Canada - Valcartier. This instrument is a Fourier-transform spectroradiometer with dual input beams. It is a passive, stand-off sensor that uses one input port to interrogate a scene under investigation while the other input beam can be pointed at the background scene. The instrument automatically measures the difference of spectral radiance between the target and the background scenes by optical subtraction, hence achieving a real-time suppression of the background signal. The resulting measurement is the unique spectral signature of the target measured in real time. The system includes a software module to control the instrument and the acquisition parameters, a module for the radiometric calibration and a module to perform the identification and quantification, in real time, of various gases. An overview of the instrument design and initial results of tests are presented.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Louis Moreau, Claude Roy, Christian Vallières, Luc Levesque, Marc-André Soucy, Eldon Puckrin, Hugo Lavoie, and Jean-Marc Thériault "A new generation of dual input beam spectroradiometers for the standoff detection of chemicals", Proc. SPIE 7304, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X, 73040L (8 May 2009);

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