Within the last several years, the field of terahertz science and technology has changed dramatically. Many new advances in the applications of terahertz imaging have been developed. We present a pulsed terahertz real-time imaging with dynamic subtraction technique. The reflective image of a Nikon camera cap is obtained. The multiwavelength imaging and polarization imaging methods are also shown in the paper. At the end, we give the result of continous-wave (CW) standoff imaging with the imaging distance of 50m.
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