利用直径为30 cm卡塞格伦反射镜搭建了一套反射式太赫兹（THz）主动成像装置，并成功运用0.22 THz的辐射源在室温下进行成像。分别使用自行制备的Nb5N6微测热辐射计THz常温检测器和商用VDI检测器进行成像并对结果进行了分析。成像的物体是5根并排排列的铜棒，铜棒直径为1.4 cm，间距为5 cm。改变参考频率，扫描速度，将成像时间从15 s减少到7.5 s。成像的范围约为20 cm×6.5 cm。两种检测器的成像分辨率达到1.41 cm。

An active imaging system has been constructed by using a Cassegrain reflector with the diameter of 30 cm. The system works at room temperature and 0.22 THz. The detectors are self-made Nb5N6 microbolometer THz detector and commercial VDI detector. Images for 5 parallel copper rods with the diameter of 1.4 cm and space of 5 cm are got and analyzed. The imaging time is reduced from 15 s to 7.5 s by changing the reference frequency and scanning velocity. The range of the image is 20 cm×6.5 cm. The special resolution of the images is about 1.41 cm for the two detectors.