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首页> 外文会议>Photonics and optoelectronics meetings;Conference on terahertz science and technology;POEM; 20081124-27;20081124-27;20081124-27; Wuhan(CN);Wuhan(CN);Wuhan(CN) >2.52-THz Scanning Reflection Imaging and Image Preprocessing
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2.52-THz Scanning Reflection Imaging and Image Preprocessing

机译：2.52-THz扫描反射成像和图像预处理

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摘要

Terahertz radiation has high penetration capability and will not cause harmful ionization to human beings; therefore THz reflection imaging has wide application prospect in security inspection and counter-terrorism. However the reflection signal in THz active imaging is weak and the sensitivity of existing detectors in this wave band is low. In this paper the 2.52-THz laser reflection imaging system based on scanning imaging is constructed. The FIR laser of SIFIR-50FPL made by Coherent Inc in America is chosen as the THz radiation source and its power is about 30mW. The detector of P4-42 made by the Molectron Corporation is adopted, which works at the room temperature with the spectral range from 1nm to over 1mm. The imaging experiments on knives and some other objects are made utilizing this system. The images of concealed objects are obtained and the images are clearer after image preprocessing. The experimental results show that this imaging system has wide application potential in security inspection.
机译：太赫兹辐射具有很高的穿透能力，不会对人体造成有害的电离。因此太赫兹反射成像在安全检查和反恐领域具有广阔的应用前景。但是，太赫兹有源成像中的反射信号较弱，并且该波段中现有检测器的灵敏度较低。本文构建了基于扫描成像的2.52-THz激光反射成像系统。选择美国Coherent Inc.生产的SIFIR-50FPL的FIR激光器作为太赫兹辐射源，其功率约为30mW。采用的是Molectron Corporation生产的P4-42检测器，该检测器在室温下工作，光谱范围为1nm至1mm以上。利用该系统对刀和其他物体进行成像实验。经过图像预处理后，可获得隐藏对象的图像，并且图像更清晰。实验结果表明，该成像系统在安全检查中具有广阔的应用潜力。

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