24 October 2016 Stand-off detection of aerosols using mid-infrared backscattering Fourier transform spectroscopy
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Abstract
The spectrum of mid-infrared light scattered from an actively illuminated aerosol was used to distinguish between different chemicals. Using spectrally broad illumination from an optical parametric oscillator covering 3.2 – 3.55 μm, characteristic absorption features of two different chemicals were detected, and two similar molecules were clearly distinguished using the spectra of backscattered light from each chemical aerosol.
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L. Maidment, L. Maidment, Z. Zhang, Z. Zhang, M. D. Bowditch, M. D. Bowditch, C. R. Howle, C. R. Howle, D. T. Reid, D. T. Reid, "Stand-off detection of aerosols using mid-infrared backscattering Fourier transform spectroscopy", Proc. SPIE 9995, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII, 999508 (24 October 2016); doi: 10.1117/12.2241052; https://doi.org/10.1117/12.2241052
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