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Active THz imaging for standoff detection

机译:Active THz成像用于支出检测

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Compared to Millimeter waves THz frequencies can provide an almost magnitude higher resolution, which enables detection of small threats at larger distances. Here we present an active THz standoff imaging system based on commercially available BWO sources and a thermal detector. At a excitation frequency of 720GHz an almost diffraction limited resolution was achieved of about 1.6mm at 1.2m distance to the target. With signal to noise ratio of 35dB detection of metal and ceramic weapons covered by different clothing is demonstrated. A detailed system analysis is done, which led to limiting factors of the proposed system.
机译:与毫米波相比,THz频率可以提供几乎幅度的分辨率,这使得能够在较大的距离处检测小威胁。这里我们介绍了基于市售的BWO源和热检测器的Active THz宿舍成像系统。在激发频率的情况下,720GHz的频率几乎衍射有限的分辨率达到目标的1.6mm。展示了35dB的信噪比,通过不同衣物覆盖的金属和陶瓷武器的噪声比。完成了详细的系统分析,从而导致了所提出的系统的限制因素。

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