Reliable active and passive hyperspectral imaging and detection of explosives and solid-phase chemical residue on surfaces remains a challenge and an active area of research and development. Both methods rely on reference libraries for material identification, but in many cases the reference spectra do not sufficiently resemble those instrumental signals scattered from real-world objects. We describe a physics-based model using the dispersive complex dielectric constant to explain what is often thought of as anomalous behavior of scattered or non-specular signatures encountered in active and passive sensing of explosives or chemicals on surfaces and show modeling and experimental results for RDX.
Revised: October 15, 2012 |
Published: September 1, 2012
Citation
Phillips M.C., J.D. Suter, B.E. Bernacki, and T.J. Johnson. 2012.Challenges of infrared reflective spectroscopy of solid-phase explosives and chemicals on surfaces. In Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII, April 23, 2012, Baltimore, Maryland. Proceedings of the SPIE, edited by AW Fountain III, 8358, Paper No. 83580T. Bellingham, Washington:SPIE.PNNL-SA-87890.doi:10.1117/12.919477