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23 July 1997 Differential detection with a double-beam interferometer
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First steps in the development of a new method for the remote detection of gaseous emanations by FTIR are presented. The method is based on the use of a double beam interferometer-spectrometer (CATSI) optimized for optical subtraction. The instrument is described with a particular emphasis on its capabilities for differential detection and background suppression. Radiometric equations applicable to the differential detection of gaseous emanations by FTIR are established for the general case of slant path scenarios containing any type of background scenes. Finally the potential of the method is illustrated through several laboratory measurements done with the CATSI system.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Marc Theriault, Claude Bradette, Andre J. Villemaire, Martin Chamberland, and Jean Giroux "Differential detection with a double-beam interferometer", Proc. SPIE 3082, Electro-Optical Technology for Remote Chemical Detection and Identification II, (23 July 1997);

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