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    • Characterizing powders using frequency-domain photon migration 

      Sevick-muraca, Eva M.; Sun, Zhigang; Pan, Tianshu (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2004-08-03)
      Characterizing a powder bed includes generating measurements by repeating the following. A location of the powder bed is illuminated with light having a time varying intensity with a resolution of less than one hundred ...