Terahertz Package Scanner for detection of concealed objects

Terahertz (THz) imaging, operating between 0.1-10 THz, offers promising potential for security screening due to its unique properties. THz radiation due to its low photon energy makes it safe for biological materials, while its smaller wavelength compared to millimeter waves enables higher resolution. A THz Package Scanner using 0.1 THz as source and a line detector has been realized. This scanner has a capability to scan small packets for detection of hidden objects such as knife, blade, scissors etc concealed under small packets made up of paper, plastic, wood. Additionally, it offers the potential for spectroscopic analysis and metal detection.