This presentation introduces advances realized at Pendar Technologies on the development of fieldable IR and Raman spectroscopy systems for the detection of residues on surfaces.
In the first part of the presentation, we will focus on active standoff infrared hyperspectral imaging of small amounts of biological materials (BG and BT spores) deposited on surfaces using a compact quantum cascade laser array-based system.
In the second part, we will discuss the development of a fieldable Raman microscopy system to autonomously analyze the composition of single particles deposited on surfaces. The compact system we developed can be used in the field by non-expert users.
This article presents new hyperspectral imaging (HSI) results from a standoff chemical detection system that utilizes monolithic arrays of Distributed Feedback (DFB) Quantum Cascade Lasers (QCLs) as a source, with each array element at a slightly different wavelength than its neighbor. In this rastering approach to HSI, analysis of analyte/substrate pairs benefits from a laser source with characteristics offered uniquely by a QCL Array. In addition to describing the HSI system developed, a description of experimental standoff detection results using the man-portable system from 1.4 meters are presented. We present HSI results on two very different chemical substrate pairs; trace solid PETN on aluminum and the liquid VX on polycarbonate.
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