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The optical parameters (refractive index, absorption coefficient) of opaque dielectric materials can be measured with terahertz (THz) Time-Domain spectroscopy (TDS). By using a THz beam of known polarization and measuring both components of the transmitted THz field, it is possible to determine the birefringence present in an anisotropic material. In this work we used polarization sensitive (PS) TDS...
In this paper we apply THz time-domain spectroscopy for monitoring the curing process of dental composites. We find very small but significant changes of the THz dielectric parameters during stepwise curing. Due to shrinking of the composites, exact knowledge of the sample thickness is required.
Terahertz time-domain spectroscopic imaging (THz-TDS imaging) producesimages with hundreds of channels. Automatic as well as manual imageanalysis is therefore difficult. We propose to use a feature set thatreduces the number of channels down to and still preserves all importantinformation. Both spectral and time-domain features areincluded in this set, and thereby information aboutdifferent content...
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