Video-rate terahertz digital holographic imaging system.
Video-rate terahertz digital holographic imaging system.
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DOI：
10.1364/oe.26.025805
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发表时间：
2018-09
期刊：
影响因子：
3.8
通讯作者：
Mark Humphreys;J. Grant;I. Escorcia-Carranza;Claudio Accarino;Mitchell Kenney;Y. Shah;K. Rew;David R. S. Cumming
中科院分区：
文献类型：
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作者：
Mark Humphreys;J. Grant;I. Escorcia-Carranza;Claudio Accarino;Mitchell Kenney;Y. Shah;K. Rew;David R. S. Cumming
太赫兹（THz）成像已经在从医疗到无损评估（NDE）的众多应用中得到证实，但目前的系统需要昂贵的组件，提供慢帧率和低分辨率。太赫兹全息术提供了一种潜在的低成本、高性能的替代方案。在这里，我们展示了第一个使用低成本光学元件的2.52太赫兹（118.8µm）全视频速率太赫兹数字全息系统。样品的二维数字重建以50 Hz的帧率进行-比以前的系统高一个数量级，同时对隐藏在普通包装类型中的样品进行成像证明了NDE应用的适用性。横向分辨率为250µm，使用1951年的美国空军目标。
Terahertz (THz) imaging has been demonstrated in numerous applications from medical to non-destructive evaluation (NDE), but current systems require expensive components, provide slow frame-rates and low resolutions. THz holography offers a potentially low-cost, high-performance alternative. Here we demonstrate the first full video-rate THz digital holography system at 2.52 THz (118.8 µm) using low-cost optical components. 2D digital reconstructions of samples are performed at frame-rates of 50 Hz - an order of magnitude higher than previous systems, whilst imaging of samples concealed in common packaging types demonstrates suitability for NDE applications. A lateral resolution of 250 µm was determined using a 1951 USAF target.