Frequency analysis of terahertz time-domain (THz-TDI) imaging of a XIX century Chinese lacquered screen

Insights about the manufacturing technique and preservation state of a precious Chinese lacquered cabinet were obtained non-invasively by terahertz time-domain imaging (THz-TDI). THz frequency analysis as well as false color rendering (FC) allowed a better discrimination of surface materials by means of areal mapping and contrast enhancement.