Abstract

Real-time, continuous-wave terahertz imaging is demonstrated with a 10mW, 2.52THz (118.8μm) far-infrared gas laser and a 160×120 element microbolometer camera. The microbolometer camera is designed for wavelengths of 7.514μm but retains sensitivity at terahertz (THz) frequencies. The setup has no moving parts, and transmission-mode THz images can be obtained at the video rate of 60  framess. The peak signal-to-noise ratio is estimated to be 13dB for a single frame of video, acquired in 16ms. With this setup, THz imaging through a FedEx envelope is demonstrated, showing the feasibility of real-time mail screening.

© 2005 Optical Society of America

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