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

摘要

We measure and simulate the diffuse scattering return from sparse particles of RDX, caffeine, and acetaminophendeposited on substrates consisting of smooth aluminum, silicon, and glass substrates at a distance of 3.6 musing a mid-infrared supercontinuum FTIR sensor. The measured spectra show that molecular fingerprintregime contains reectance peaks that can be used for chemical identiffication and the mid-wave infrared providesinformation for target orientation. Furthermore, we demonstrate that spectra obtained using our supercontinuumFTIR sensor can be accurately simulated using a Bobbert-Vlieger model. The Bobbert-Vlieger model can thenbe used to create a library that can account for the trace chemical, underlying substrate, and target orientation,for stand-off chemical identication.