Fig. 1. Experimental setup for reflective terahertz focal plane imaging

Fig. 2. Prediction of spatial resolution performance of terahertz focal plane imaging system. (a) Imaging spot; (b) metal sheet visible light image; (c) metal sheet terahertz image; (d) grayscale curve of vertical profiles, as indicated by the dotted line in Fig. (c)

Fig. 3. Prediction of image contrast performance of terahertz focal plane imaging system. (a) Coin visible light image; (b) coin terahertz image before image processing; (c) terahertz image after image processing; (d) grayscale curves of vertical and horizontal profiles, as shown by solid and dotted lines in Fig. (b) and (c), respectively

Fig. 4. Terahertz imaging results of fresh pork tissue. (a)(c) Visible light images; (b)(d) terahertz images

Fig. 5. Terahertz imaging results of fresh rat brain tissue. (a) Visible light image; (b) terahertz image

Fig. 6. Terahertz imaging results of fresh human glioma tissue. (a) Visible light image; (b) H&E staining image; (c) terahertz image