Compact active hyperspectral imaging system for the detection of concealed targets

Bernadette Johnson; Rose Joseph; Melissa L. Nischan; Amy B. Newbury; John P. Kerekes; Herbert T. Barclay; Berton C. Willard; John J. Zayhowski

doi:10.1117/12.357002

2 August 1999 Compact active hyperspectral imaging system for the detection of concealed targets

Bernadette Johnson, Rose Joseph, Melissa L. Nischan, Amy B. Newbury, John P. Kerekes, Herbert T. Barclay, Berton C. Willard, John J. Zayhowski

Author Affiliations +

Proceedings Volume 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV; (1999) https://doi.org/10.1117/12.357002
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

We have recently conducted a series of laboratory and field test to demonstrate the utility of combining active illumination with hyperspectral imaging for the detection of concealed targets in natural terrain. The active illuminator, developed at MIT Lincoln Laboratory, is a novel microlaser-pumped fiber Raman source that provides high- brightness, subnanosecond-pulse-length output spanning the visible through near-IR spectral range. The hyperspectral- imaging system is comprised of a compact, grating-based spectrometer that uses a gateable, intensified CCD array as the detector element. The illuminator and hyperspectral imaging system are mounted on a small platform that is itself mounted on a tripod and scanned in azimuth to build an image scene of up to several hundred spectral bands. The system has been deployed under a variety of environmental conditions, including night-time illumination, and on a variety of target scenes, including exposed and concealed plastic and metallic mine-like targets. Targets have been detected and identified on the basis of spectral reflectance, fluorescence signatures, degree of polarization, and range-to-target information. The combination of laser-like broadband illumination and hyperspectral imaging offers great promise in concealed or obscured target detection. On-going developments include the incorporation of broadband illuminators in the 1 to 2 micrometers and 3 to 5 micrometers spectral bands, with corresponding increases in spectral coverage of the imaging and detection systems.

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Bernadette Johnson, Rose Joseph, Melissa L. Nischan, Amy B. Newbury, John P. Kerekes, Herbert T. Barclay, Berton C. Willard, and John J. Zayhowski "Compact active hyperspectral imaging system for the detection of concealed targets", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); https://doi.org/10.1117/12.357002

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