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Proceedings Paper

Compact active hyperspectral imaging system for the detection of concealed targets
Author(s): Bernadette Johnson; Rose Joseph; Melissa L. Nischan; Amy B. Newbury; John P. Kerekes; Herbert T. Barclay; Berton C. Willard; John J. Zayhowski
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Paper 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.

Paper Details

Date Published: 2 August 1999
PDF: 10 pages
Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); doi: 10.1117/12.357002
Show Author Affiliations
Bernadette Johnson, MIT Lincoln Lab. (United States)
Rose Joseph, MIT Lincoln Lab. (United States)
Melissa L. Nischan, MIT Lincoln Lab. (United States)
Amy B. Newbury, MIT Lincoln Lab. (United States)
John P. Kerekes, MIT Lincoln Lab. (United States)
Herbert T. Barclay, MIT Lincoln Lab. (United States)
Berton C. Willard, MIT Lincoln Lab. (United States)
John J. Zayhowski, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 3710:
Detection and Remediation Technologies for Mines and Minelike Targets IV
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Regina E. Dugan, Editor(s)

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