CW THz scanning transmission imaging for concealed object detection

Qi Li; Rui Yao; Qiguo Yin; Shenghui Ding; Qi Wang

doi:10.1117/12.834706

4 August 2009 CW THz scanning transmission imaging for concealed object detection

Qi Li, Rui Yao, Qiguo Yin, Shenghui Ding, Qi Wang

Proceedings Volume 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications; 73850R (2009) https://doi.org/10.1117/12.834706
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

In the paper, the two-dimensional THz imaging methods are described. The SIFIR-50 FPL Far-Infrared Laser is used as the THz source. The output frequency is 2.5THz in the experiment, because the THz laser operates steadily at this frequency. The P4-42 detector works at room temperature and offers relatively high sensitivity. The software of THz imaging system is self-designed, and it plays a crucial role in this imaging system because it controls nearly all the operations of this system, including the two-dimensional scanning, image data collection, image data storage, image display and image processing. Utilizing this setup, THz transmission images of concealed objects are obtained. In the experiment, a bottle cap and a plastic board covered by reflective materials are chosen as the imaging objects; paper and Teflon are placed before the object to test the transmission imaging effect. The experimental results show that this imaging system can generate clear images.

Citation Download Citation

Qi Li, Rui Yao, Qiguo Yin, Shenghui Ding, and Qi Wang "CW THz scanning transmission imaging for concealed object detection", Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73850R (4 August 2009); https://doi.org/10.1117/12.834706

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