Long-wave infrared scattering spectra and modeling of trace particles on surfaces for standoff detection
Abstract
We experimentally measure the scattered reflectance of particles deposited on smooth substrates with a mid-wave to long-wave supercontinuum source and a FTIR based sensor at 3.6 m. We measure the scattering return from sparse particles of 1,3,5-Trinitroperhydro-1,3,5-triazine, caffeine, and acetaminophen deposited on smooth aluminum, silicon, and glass substrates. We also measure mono-disperse 5.4, 10.8, and 19.4 μm diameter polystyrene spheres deposited on aluminum. We demonstrate that spectra obtained using our supercontinuum FTIR sensor can be accurately simulated using a Bobbert–Vlieger model, and non-spherical particle spectra can be approximated by spherical results. The Bobbert–Vlieger model can then be used to create a library that can account for the trace chemical and underlying substrate for standoff chemical identification.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 23, 2020
- Source ID
- 10.1063/5.0009463
Entities
People
- Agustin I. Ifarraguerri
- Fred L Terry
- Kaiwen Guo
- Mohammed N. Islam
- Ramon A Martinez
- Tianqu Zhai
Organizations
- Intelligence Advanced Research Projects Activity
- University of Michigan