Infrared backscatter imaging spectroscopy for standoff detection of hazardous materials

Drew M. Finton; Christopher J. Breshike; Christopher A. Kendziora; Robert Furstenberg; R. Andrew McGill

doi:10.1117/12.2618396

30 May 2022 Infrared backscatter imaging spectroscopy for standoff detection of hazardous materials

Drew M. Finton, Christopher J. Breshike, Christopher A. Kendziora, Robert Furstenberg, R. Andrew McGill

Proceedings Volume 12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII; 121160Q (2022) https://doi.org/10.1117/12.2618396
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

We present the further development of a cart-based system for infrared backscatter imaging spectroscopy (IBIS) designed to detect and analyze trace amounts of hazardous materials at proximal stand-off distances. A four-chip quantum cascade laser system quickly scans through the mid- to long-wave infrared (6 µm – 11 µm) wavelength range to illuminate samples contaminated with analyte. The backscattered light from the targets is collected with a liquid nitrogen cooled MCT focal plane array. Wavelengths are assigned to each frame collected with the MCT camera corresponding to the emission of the laser at the time of acquisition. This process builds a hyperspectral image cube containing spectral reflectance data for every pixel in the image. The experimental results of this cart-based infrared illumination and backscatter detection are presented. A single detection event can be completed in less than 1 second, and every pixel of the 128x128 camera array produces an individual spectrum. Advancements in this setup include mitigation of QCL beam wander and differentiating between nine analytes all present within the same one square inch target. Reference spectra of the target analytes are measured using a high resolution FTIR to validate the highly sensitive and chemically specific nature of the IBIS cart-based measurement. The sample was prepared to mimic real-world threats such as explosives and illicit drugs in trace amounts on relevant substrates.

Conference Presentation

Citation Download Citation

Drew M. Finton, Christopher J. Breshike, Christopher A. Kendziora, Robert Furstenberg, and R. Andrew McGill "Infrared backscatter imaging spectroscopy for standoff detection of hazardous materials", Proc. SPIE 12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII, 121160Q (30 May 2022); https://doi.org/10.1117/12.2618396

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available