A Range-Gated Intensified Spectrographic Imager: An Instrument for Active Hyperspectral Imaging

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Authors
  1. Simard, J-R.
  2. Mathieu, P.
  3. Fournier, G.
  4. Larochelle, V.
  5. Babey, S.K.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
Hyperspectral imaging has demonstrated impressive capabilities in airborne surveys, particularly for mineral and biomass characterisations. Based on this success, it is believed that other applications like search and rescue operations, and detection/identification of various ground military targets could greatly benefit from this technology. The strength of hyperspectral imaging comes from the access to another dimension of information: the spectral content of the detected return signal for each spatial pixel. In the case of conventional hyperspectral imaging, the return signal depicts the spectral reflectance of the day irradiance from the scene within the field of view of each pixel. However, by inserting a range-gated intensifier into a hyperspectral camera and by combining the camera with selected pulsed lasers, it becomes possible to relate the returned spectral information to specific light/matter interactions like induced fluorescence. This new technique may be referred to as "active hyperspectral imaging". Among its advantages, this approach is independent of the ambient lighting conditions and can be customised in excitation wavelengths. Moreover, by using a range-gated intensified camera, it is possible to survey limited areas with a significant increase in signal-to-noise ratio. TRUNCATED
Keywords
Hyperspectral imaging;HMD (Hyperspectral Mine Detection);Hyperspectral imagery;Remote Minefield Detection (RMD)
Report Number
DREV-TM-2000-032 — Technical Memorandum
Date of publication
01 May 2000
Number of Pages
34
DSTKIM No
CA002045
CANDIS No
513569
Format(s):
Hardcopy;Document Image stored on Optical Disk

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