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Terahertz pulsed imaging (TPI) is a powerful tool for nondestructive and quantitative characterization of pharmaceutical tablet coatings. In this paper, we present various processing methods for determining coating thickness from the measured terahertz waveform. We demonstrate that a wavelet-based method can be used to characterize the tablet coating with a thickness down to 25 microns, which is better...
Terahertz pulsed imaging (TPI) and optical coherence tomography (OCT) are two powerful techniques allowing high quality three-dimensional images from within scattering media to be obtained noninvasively. In this paper, we report experimental results of using TPI and OCT for characterizing layered samples including pharmaceutical coatings. We found that infrared OCT provides better axial resolutions...
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