THz imaging system for industrial quality control

THz imaging technology can complement quality controls in Agricultural and food industry due to the new point of view offered by THz. In this paper, an active THz imaging system based on a network analyzer with two frequency extender up to 0.22THz and a quasioptical system is presented. The resolution of the system is measured using metal squares placed on a leaf. This metal squares are used to show differences in power absorption levels. Defects are also placed in one sample, in order to check the possibilities offered by THz imaging to detect unwanted objects and defects in a leaf.