On the measurement uncertainties of THz imaging systems based on compressive sampling

Several numerical tests, conducted by means of an optimized design of experiments, allow to (i) assess the sensitivity to relevant uncertainty sources of the reconstructed image quality and (ii) define a suitable performance factor capable of driving experimenters towards a proper configuration of the measurement station. In particular, misalignment of the CS masks turns out to be the most impacting uncertainty source, as confirmed by experimental tests carried out through an actual THz Imaging system. Nevertheless, the performance factor estimated on the reconstructed image of a reference target is capable of highlighting the presence of an incorrect configured Imaging system, thus making it possible to remedy and provide accurate and reliable THz images.