中国激光, 2014, 41 (8): 0811002, 网络出版: 2014-07-15
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
摘要
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。
Abstract
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.
孙振龙, 涂学凑, 姜奕, 康琳, 陈健, 吴培亨. 基于自制太赫兹检测器的快速成像系统[J]. 中国激光, 2014, 41(8): 0811002. Sun Zhenlong, Tu Xuecou, Jiang Yi, Kang Lin, Chen Jian, Wu Peiheng. Fast Imaging System Based on Self-Made Terahertz Detector[J]. Chinese Journal of Lasers, 2014, 41(8): 0811002.