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Stand-off FTIR spectroscopy utilizing a long-wave infrared supercontinuum source
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Paper Abstract

We demonstrate a prototype sensor capable of measuring specular and diffuse reflectance spectra from samples 3.6 m away. The sensor utilizes mid-wave to long-wave infrared supercontinuum light coupled into a rotational FTIR spectrometer to actively probe remote samples. We measure the diffuse reflectance of acetaminophen at 41.77 μg/cm2 on a glass substrate and find that a modified Bobbert-Vlieger analysis can estimate the effects of particle size distribution on return spectra. We find that the measured return from stand-off particulate measurements depends not only on the chemical identity, but also the size and distribution of particles on the substrate.

Paper Details

Date Published: 7 March 2019
PDF: 9 pages
Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108971Q (7 March 2019); doi: 10.1117/12.2513908
Show Author Affiliations
Ramon A. Martinez, Univ. of Michigan (United States)
Kaiwen Guo, Univ. of Michigan (United States)
Tianqu Zhai, Univ. of Michigan (United States)
Fred L. Terry, Univ. of Michigan (United States)
Mohammed N. Islam, Univ. of Michigan (United States)
Omni Sciences Inc. (United States)
Lukasz Maksymiuk, Omni Sciences Inc. (United States)
Robert L. Maynard, Omni Sciences Inc. (United States)
Michael J. Freeman, Omni Sciences Inc. (United States)
Carl A. DeWilde, Omni Sciences Inc. (United States)
Agustin I. Ifarraguerri, Leidos, Inc. (United States)

Published in SPIE Proceedings Vol. 10897:
Fiber Lasers XVI: Technology and Systems
Adrian L. Carter; Liang Dong, Editor(s)

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