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Nondestructive evaluation of cork enclosures using terahertz/millimeter wave spectroscopy ...

建立日期：2018/02/12
  • 作者： Yew Li Hor,...
  • 出處： Department of Physics, New Jersey Institute of Technology
  • 內容： Natural cork enclosures, due to their cell structure, composition, and low moisture are fairly transparent to terahertz (THz) and millimeter waves enabling nondestructive evaluation of the corks surface and interior. It is shown that the attenuation coefficient of the defect-free cork can be modeled with a Mie scattering model in the weakly scattering limit. Contrast in the THz images is a result of enhanced scattering of THz radiation by defects or voids as well as variations in the cork cell structure. The presence of voids, defects, and changes in grain structure can be determined with roughly 100-300 µm resolution.
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