Inverse analysis of diffuse-reflectance spectra for surface-distributed PETN particles

S. G. Lambrakos; R. Furstenberg; C. Breshike; Y. Kim; C. Kendziora; T. Huffman; R. A. McGill; A. Shabaev

doi:10.1117/12.2554398

24 April 2020 Inverse analysis of diffuse-reflectance spectra for surface-distributed PETN particles

S. G. Lambrakos, R. Furstenberg, C. Breshike, Y. Kim, C. Kendziora, T. Huffman, R. A. McGill, A. Shabaev

Proceedings Volume 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI; 114160X (2020) https://doi.org/10.1117/12.2554398
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

Threat chemicals such as explosives may persist on surfaces, enabling them to be detected by non-contact or standoff optical methods such as diffuse IR reflectance. However, due to particle size effects and optical coupling to the substrate, their IR spectral signatures will differ from laboratory reference measurements of bulk materials. This study presents an inverse analysis of diffuse IR reflectance from sparsely surface-distributed particles of the explosive PETN. A methodology using spectrum templets is applied for inverse analysis of measured spectra. The methodology is based on a generalization of extended multiplicative signal correction (EMSC). The results of this study demonstrate application of the inverse analysis methodology for extraction of spectral features for surface-distributed particles of specified dielectric response.

Citation Download Citation

S. G. Lambrakos, R. Furstenberg, C. Breshike, Y. Kim, C. Kendziora, T. Huffman, R. A. McGill, and A. Shabaev "Inverse analysis of diffuse-reflectance spectra for surface-distributed PETN particles", Proc. SPIE 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI, 114160X (24 April 2020); https://doi.org/10.1117/12.2554398

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