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Single-Shot Direct Transmission Terahertz Imaging Based on Intense Broadband Terahertz Radiation
Yue, Zhang1,2; Peng, Xiaoyu1,2; Li, Guangyuan1,2; Zhou, Yilei1,2; Pu, Yezi1,2; Zhang, Yuhui1,2
2024-07-01
摘要There are numerous applications of terahertz (THz) imaging in many fields. However, current THz imaging is generally based on scanning technique due to the limited intensity of the THz sources. Thus, it takes a long time to obtain a frame image of the target and cannot meet the requirement of fast THz imaging. Here, we demonstrate a single-shot direct THz imaging strategy based on a broadband intense THz source with a frequency range of 0.1-23 THz and a THz camera with a frequency response range of 1 similar to 7 THz. This THz source was generated from the laser-plasma interaction, with its central frequency at similar to 12 THz. The frame rate of this imaging system was 8.5 frames per second. The imaging resolution reached 146.2 mu m. With this imaging system, a single-shot THz image for a target object with a size of more than 7 cm was routinely obtained, showing a potential application for fast THz imaging. Furthermore, we proposed and tested an image enhancement algorithm based on an improved dark channel prior (DCP) theory and multi-scale retinex (MSR) theory to optimize the image brightness, contrast, entropy and peak signal-to-noise ratio (PSNR).
关键词fast THz imaging THz transmission imaging intense broadband THz radiation multi-scale retinex
DOI10.3390/s24134160
发表期刊SENSORS
卷号24期号:13页码:12
通讯作者Peng, Xiaoyu(xypeng@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:001268170900001
语种英语