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Proceedings Article

Compact active hyperspectral imaging system for the detection of concealed targets

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

MIT Lincoln Lab. (USA)

Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, 144 (August 2, 1999); doi:10.1117/12.357002
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From Conference Volume 3710

  • Detection and Remediation Technologies for Mines and Minelike Targets IV
  • Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Regina E. Dugan
  • Orlando, FL | April 05, 1999

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.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Bernadette Johnson ; Rose Joseph ; Melissa L. Nischan ; Amy B. Newbury ; John P. Kerekes, et al.
"Compact active hyperspectral imaging system for the detection of concealed targets", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, 144 (August 2, 1999); doi:10.1117/12.357002; http://dx.doi.org/10.1117/12.357002


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