Scattering spectra from trace particles actively illuminated by a mid-infrared supercontinuum FTIR sensor

Ramon A. Martinez; Kaiwen Guo; Fred L. Terry Jr.; Tianqu Zhai; Mohammed N. Islam; Agustin I. Ifarraguerri

doi:10.1117/12.2550334

21 February 2020 Scattering spectra from trace particles actively illuminated by a mid-infrared supercontinuum FTIR sensor

Ramon A. Martinez, Kaiwen Guo, Fred L. Terry Jr., Tianqu Zhai, Mohammed N. Islam, Agustin I. Ifarraguerri

Author Affiliations +

Proceedings Volume 11234, Optical Biopsy XVIII: Toward Real-Time Spectroscopic Imaging and Diagnosis; 112340V (2020) https://doi.org/10.1117/12.2550334
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

We measure and simulate the diffuse scattering return from sparse particles of RDX, caffeine, and acetaminophen deposited on substrates consisting of smooth aluminum, silicon, and glass substrates at a distance of 3.6 m using a mid-infrared supercontinuum FTIR sensor. The measured spectra show that molecular fingerprint regime contains reflectance peaks that can be used for chemical identification and the mid-wave infrared provides information for target orientation. Furthermore, we demonstrate that spectra obtained using our supercontinuum FTIR sensor can be accurately simulated using a Bobbert-Vlieger model. The Bobbert-Vlieger model can then be used to create a library that can account for the trace chemical, underlying substrate, and target orientation, for stand-off chemical identification.

Citation Download Citation

Ramon A. Martinez, Kaiwen Guo, Fred L. Terry Jr., Tianqu Zhai, Mohammed N. Islam, and Agustin I. Ifarraguerri "Scattering spectra from trace particles actively illuminated by a mid-infrared supercontinuum FTIR sensor", Proc. SPIE 11234, Optical Biopsy XVIII: Toward Real-Time Spectroscopic Imaging and Diagnosis, 112340V (21 February 2020); https://doi.org/10.1117/12.2550334

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