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Optical Engineering • Open Access

Hyperspectral microscopy of explosives particles using an external cavity quantum cascade laser

Paper Abstract

Using infrared hyperspectral imaging, microscopy of small particles of the explosives compounds RDX, tetryl, and PETN with near diffraction-limited performance is demonstrated. The custom microscope apparatus includes an external cavity quantum cascade laser illuminator scanned over its tuning range of 9.13 to 10.53 μm in 4 s, coupled with a microbolometer focal plane array to record infrared transmission images. The hyperspectral microscopy technique is used to study the infrared absorption spectra of individual explosives particles, and demonstrate subnanogram detection limits.

Paper Details

Date Published: 1 June 2013
PDF: 6 pages
Opt. Eng. 52(6) 061302 doi: 10.1117/1.OE.52.6.061302
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Mark C. Phillips, Pacific Northwest National Lab. (United States)
Bruce E. Bernacki, Pacific Northwest National Lab. (United States)

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