Real-time two-dimensional terahertz tomography of moving objects
Real-time two-dimensional terahertz tomography of moving objects
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DOI：
10.1016/j.optcom.2006.05.063
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发表时间：
2006-11
影响因子：
2.4
通讯作者：
T. Yasuda;T. Yasui;T. Araki;E. Abraham
中科院分区：
文献类型：
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作者：
T. Yasuda;T. Yasui;T. Araki;E. Abraham
我们提出实时二维 (2D) 太赫兹 (THz) 断层扫描，用于移动物体的 2D 横截面成像。所提出的方法不需要用于时间延迟和样本位置的机械扫描元件，而这对于传统的太赫兹断层扫描是必不可少的。为此，通过使用非共线 2D 自由空间电光采样的时空转换和样品上太赫兹光束的线聚焦，以 10 帧/秒的帧速率获取 2D 时空太赫兹图像。我们演示了如何使用实时 2D THz 断层扫描来实时监控移动油漆样品中的油漆厚度以及湿漆膜中的干燥进度。该方法为无损检测和生物医学诊断领域的非电离和非接触探测提供了强大的工具。
We propose real-time two-dimensional (2D) terahertz (THz) tomography for 2D cross-sectional imaging of moving objects. The proposed method does not require mechanical scanning elements for time delay and sample position, which are essential for conventional THz tomography. For this purpose, a 2D spatiotemporal THz image is acquired at a frame rate of 10 frame/s by a combination of time-to-space conversion using non-collinear 2D free-space electro-optic sampling and line focusing of a THz beam on a sample. We demonstrate the use of real-time 2D THz tomography for real-time monitoring of the paint thickness in a moving paint sample and the drying progress in a wet paint film. The proposed method provides a powerful tool for non-ionizing and non-contact probing in the fields of nondestructive testing and biomedical diagnostics.