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Characterization of a terahertz wave scanned imaging system for threat detection at standoff distances

机译：太赫兹波扫描成像系统的特征，用于在相距距离处进行威胁检测

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摘要

A terahertz active scanned imaging system is developed in order to acquire images of various targets at stand-off distances. The images are analyzed with respect to the experimentally obtained beam profile at the target plane using a commercially available mm-wave/terahertz camera. The active scanning system utilizes a heterodyne, continuous wave transceiver unit operating at 340 GHz and 2-D opto-mechanical scanning of the target plane is performed using two large area mirror coupled galvanometers. 340 GHz working frequency allows standoff imaging with adequate resolution with the help of a suitable optical design. Results given here correspond to the imaging of various objects placed at least 120 cm away from the transceiver, with a 5 x cm2 field of view. Image resolution is about 0.6 cm in the horizontal, 0.3 cm in the vertical direction which was assessed by analyzing the measured beam profiles on the target plane with a commercial mm-wave/terahertz camera.
机译：开发了太赫兹有源扫描成像系统，以获取相距一定距离的各种目标的图像。使用市售的毫米波/太赫兹相机，针对在目标平面上通过实验获得的光束轮廓分析图像。有源扫描系统利用以340 GHz工作的外差式连续波收发器单元，并使用两个大面积镜面耦合检流计对目标平面进行2维光机械扫描。 340 GHz的工作频率可以借助合适的光学设计以足够的分辨率进行间隔成像。此处给出的结果对应于距离收发器至少120 cm的各种物体的成像，其视野为5 x cm2。图像分辨率在水平方向上约为0.6厘米，在垂直方向上约为0.3厘米，这是通过使用商用毫米波/太赫兹相机分析目标平面上测得的光束轮廓来评估的。

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  • 来源
    《Optical and quantum electronics》 |2016年第7期|367.1-367.6|共6页
  • 作者

    I. Ozan Yildirim; V. Ali OEzkan; Firat Idikut; Taylan Takan; A. Behzat Sahin; Hakan Altan;

  • 作者单位

    Physics Department, Middle East Technical University, 06800 Ankara, Turkey;

    Physics Department, Middle East Technical University, 06800 Ankara, Turkey;

    Physics Department, Middle East Technical University, 06800 Ankara, Turkey;

    Physics Department, Middle East Technical University, 06800 Ankara, Turkey;

    Electronics and Communication Engineering Department, Yildirim Beyazit University, Ankara, Turkey;

    Physics Department, Middle East Technical University, 06800 Ankara, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Terahertz radiation; Scanned imaging; Threat detection;

    机译：太赫兹辐射;扫描成像威胁检测;

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