Advanced LWIR hyperspectral sensor for on-the-move proximal detection of liquid/solid contaminants on surfaces

Jay P. Giblin; John Dixon; Julia R. Dupuis; Bogdan R. Cosofret; William J. Marinelli

doi:10.1117/12.2263390

4 May 2017 Advanced LWIR hyperspectral sensor for on-the-move proximal detection of liquid/solid contaminants on surfaces

Jay P. Giblin, John Dixon, Julia R. Dupuis, Bogdan R. Cosofret, William J. Marinelli

Author Affiliations +

Proceedings Volume 10183, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII; 1018305 (2017) https://doi.org/10.1117/12.2263390
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

Abstract

Sensor technologies capable of detecting low vapor pressure liquid surface contaminants, as well as solids, in a noncontact fashion while on-the-move continues to be an important need for the U.S. Army. In this paper, we discuss the development of a long-wave infrared (LWIR, 8-10.5 μm) spatial heterodyne spectrometer coupled with an LWIR illuminator and an automated detection algorithm for detection of surface contaminants from a moving vehicle. The system is designed to detect surface contaminants by repetitively collecting LWIR reflectance spectra of the ground. Detection and identification of surface contaminants is based on spectral correlation of the measured LWIR ground reflectance spectra with high fidelity library spectra and the system’s cumulative binary detection response from the sampled ground. We present the concepts of the detection algorithm through a discussion of the system signal model. In addition, we present reflectance spectra of surfaces contaminated with a liquid CWA simulant, triethyl phosphate (TEP), and a solid simulant, acetaminophen acquired while the sensor was stationary and on-the-move. Surfaces included CARC painted steel, asphalt, concrete, and sand. The data collected was analyzed to determine the probability of detecting 800 μm diameter contaminant particles at a 0.5 g/m² areal density with the SHSCAD traversing a surface.

Citation Download Citation

Jay P. Giblin, John Dixon, Julia R. Dupuis, Bogdan R. Cosofret, and William J. Marinelli "Advanced LWIR hyperspectral sensor for on-the-move proximal detection of liquid/solid contaminants on surfaces", Proc. SPIE 10183, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII, 1018305 (4 May 2017); https://doi.org/10.1117/12.2263390

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KEYWORDS

Reflectivity

Sensors

Long wavelength infrared

Liquids

Particles

Photography

Solids

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