Fig. 1. Schematic and physical diagrams of terahertz active imaging system. (a) Schematic diagram; (b) physical picture

Fig. 2. Schematic diagrams of system rotating mirror and scanning trajectory. (a) Schematic diagram of system rotating mirror; (b) scanning trajectory

Fig. 3. Fitting track and computing track. (a) (α,γ) fitting; (b) (u,v) fitting

Fig. 4. Imaging results of horizontal fringe scanning. (a) Sample figure; (b) original figure;(c) (α,γ) fitting figure; (d) (u,v) fitting figure

Fig. 5. Imaging results of vertical fringe scanning. (a) Sample figure; (b) original figure; (c) (α,γ) fitting figure; (d) (u,v) fitting figure