Real-time residue and powder analysis with laser-assisted infrared imaging

Miles Weida; Patrick Mock; Peter Buerki; Michael Henson; Timothy Day

doi:10.1117/12.919227

4 May 2012 Real-time residue and powder analysis with laser-assisted infrared imaging

Miles Weida, Patrick Mock, Peter Buerki, Michael Henson, Timothy Day

Proceedings Volume 8358, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII; 835813 (2012) https://doi.org/10.1117/12.919227
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

First responders have the need to quickly assess a situation; Understanding if there are biological or explosive hazards present can influence a plan of action. The need for real-time information, however, precludes most laboratory analysis techniques. The requirement of not disturbing a sample until it is understood makes the problem even more challenging. Visual identification can go a long way in assessing a threat, and now technologies in the mid-infrared (2 to 20 μm) spectral region allow extending that "vision" into a spectral region known for its chemical identification capabilities. This paper considers the fusion of tunable quantum cascade lasers with infrared focal plane arrays to create a true chemical imager. Instrumentation is developed that allows real-time chemical analysis of residues and powders in a noncontact fashion. Identification of explosive residues and biological powders are considered as examples of use of this new technology for first responders. As opposed to many fielded technologies that allow only point detection of substances, and often require many seconds to analyze a sample, mid-infrared chemical imagers provide context in addition to sample analysis in real time. They are also ideal for image fusion techniques combining visual images with chemical images from an infrared multispectral analysis. This type of chemical overlay on live video provides first responders with a powerful tool for rapid threat assessment.

Citation Download Citation

Miles Weida, Patrick Mock, Peter Buerki, Michael Henson, and Timothy Day "Real-time residue and powder analysis with laser-assisted infrared imaging", Proc. SPIE 8358, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII, 835813 (4 May 2012); https://doi.org/10.1117/12.919227

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KEYWORDS

Mid-IR

Quantum cascade lasers

Chemical analysis

Cameras

Infrared imaging

Absorption

Biological research

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