基于自制太赫兹检测器的快速成像系统  

Fast Imaging System Based on Self-Made Terahertz Detector

作　　者：孙振龙[1] 涂学凑[1] 姜奕[2] 康琳[1] 陈健[1] 吴培亨[1] 

机构地区：[1]南京大学超导电子学研究所,江苏南京210093 [2]南京电子技术研究所,江苏南京210039

出　　处：《中国激光》2014年第8期246-249,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(11173015)

摘　　要：利用直径为30cm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0.22THz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1.4cm,间距为5cm。改变参考频率,扫描速度,将成像时间从15s减少到7.5s。成像的范围约为20cm×6.5cm。两种检测器的成像分辨率达到1.41cm。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 NbsN6 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.

关 键 词：成像系统 太赫兹 卡塞格伦反射镜 快速成像 

分 类 号：O436[机械工程—光学工程]