A new generation of dual input beam spectroradiometers for the standoff detection of chemicals


  1. Moreau, L.
  2. Roy, C.
  3. Vallière, C.
  4. Levesque, L.
  5. Soucy, M-A.
  6. Puckrin, E.
  7. Lavoie, H.
  8. Thériault, J-M.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);ABB Remote Sensing Group, Quebec Que (CAN)
A new generation of optical subtraction instruments for the stand-off detection of chemicals will be presented. It combines the latest ABB Bomem spectroradiometer technology and software with the concepts used in the design of the original instrument designed and manufactured more than 12 years ago by ABB and Defence Research and Development Canada - Valcartier. This instrument is a Fourier-transform spectroradiometer with dual input beams. It is a passive, stand-off sensor that uses one input port to interrogate a scene under investigation while the other input beam can be pointed at the background. Scene. The instrument automatically measures the difference of spectral radiance between the target and the background scenes, hence achieving a real-time suppression of the background signal. The resulting measurement is the unique spectral signature of the target measured in real time. The system includes a software module to control the instrument and the acquisition parameters, a module for the radiometric calibration and a module to perform the identification and quantification, in real time, of various gases. An overview of the instrument design and initial results of tests are presented.
Report Number
DRDC-VALCARTIER-SL-2009-411 — Scientific Literature
Date of publication
01 May 2009
Number of Pages
Electronic Document(PDF)

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