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Knowledge based spectrometer

  • US 8,203,715 B2
  • Filed: 05/14/2009
  • Issued: 06/19/2012
  • Est. Priority Date: 05/14/2009
  • Status: Active Grant
First Claim
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1. A method for remotely determining a presence of a particular substance based on spectral data of the particular substance obtained by a spectrometer comprising an interferometer, the method comprising:

  • using the interferometer to form an interference pattern resulting from an interaction of radiation with the particular substance;

    sampling, at the interferometer, the interference pattern to generate a plurality of measured samples having a measured sample spacing associated therewith;

    reading reference spectral data from a spectral reference database;

    using cosine estimation at the measured sample spacing for determining amplitudes associated with frequencies uniquely associated with features of spectral data in the plurality of measured samples;

    modifying the reference spectral data by selecting a plurality of band centers for the reference spectral data;

    comparing the modified reference spectral data with the determined spectral data from the cosine estimation; and

    determining a presence of the particular substance based on results of the comparing.

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