Four-channel terahertz time-domain spectroscopy system for industrial pipe inspection

The measurement of layer thicknesses is one of the most promising fields of applications of terahertz measurement systems [1, 2]. Besides the investigation of coatings in the automotive or aeronautic industry, the inline inspection of wall thickness in pipe production processes is another highly interesting application scenario for terahertz technology. We present a four-channel terahertz time-domain spectroscopy systems developed for the inline measurement of pipe wall thickness measurements.