Han Sang-Pil, Ko Hyunsung, Kim Namje, Lee Won-Hui, Moon Kiwon, Lee Il-Min, Lee Eui Su, Lee Dong Hun, Lee Wangjoo, Han Seong-Tae, Choi Sung-Wook, Park Kyung Hyun
Opt Express. 2014 Nov 17;22(23):28977-83. doi: 10.1364/OE.22.028977.
We demonstrate real-time continuous-wave terahertz (THz) line-scanned imaging based on a 1 × 240 InGaAs Schottky barrier diode (SBD) array detector with a scan velocity of 25 cm/s, a scan line length of 12 cm, and a pixel size of 0.5 × 0.5 mm². Foreign substances, such as a paper clip with a spatial resolution of approximately 1 mm that is hidden under a cracker, are clearly detected by this THz line-scanning system. The system consists of the SBD array detector, a 200-GHz gyrotron source, a conveyor system, and several optical components such as a high-density polyethylene cylindrical lens, metal cylindrical mirror, and THz wire-grid polarizer. Using the THz polarizer, the signal-to-noise ratio of the SBD array detector improves because the quality of the source beam is enhanced.
我们展示了基于1×240铟镓砷肖特基势垒二极管（SBD）阵列探测器的实时连续波太赫兹（THz）线扫描成像，其扫描速度为25厘米/秒，扫描线长度为12厘米，像素尺寸为0.5×0.5平方毫米。该太赫兹线扫描系统能够清晰地检测到隐藏在饼干下空间分辨率约为1毫米的异物，如回形针。该系统由SBD阵列探测器、200吉赫兹回旋管源、输送系统以及几个光学组件组成，如高密度聚乙烯柱面透镜、金属柱面镜和太赫兹线栅偏振器。使用太赫兹偏振器可提高SBD阵列探测器的信噪比，因为源光束的质量得到了增强。
