Spatial pattern separation of chemicals and frequency-independent components by terahertz spectroscopic imaging.
Spatial pattern separation of chemicals and frequency-independent components by terahertz spectroscopic imaging.
复制标题
通过太赫兹光谱成像对化学品和频率无关成分进行空间图案分离。
DOI：
10.1364/ao.42.005744
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发表时间：
2003
期刊：
影响因子：
1.9
通讯作者：
H. Minamide
中科院分区：
文献类型：
--
作者：
Y. Watanabe;K. Kawase;T. Ikari;Hiromasa Ito;Y. Ishikawa;H. Minamide
我们使用已知的光谱曲线分离了化学品中频率相关吸收的分量空间图案和太赫兹（THz）光谱图像中的塑料、纸张和测量噪声等频率无关分量。我们的测量系统，它使用了一个广泛可调谐的相干太赫兹波参量振荡器源，可以在1-2太赫兹范围内的特定频率的图像。利用化学物质的频率无关成分，可以很容易地提取出化学物质的成分模式。该方法可以成功地用于无损检测，以检测隐藏的非法药物和生物恐怖主义装置，里面的邮件和包裹
We separated the component spatial patterns of frequency-dependent absorption in chemicals and frequency-independent components such as plastic, paper, and measurement noise in terahertz (THz) spectroscopic images, using known spectral curves. Our measurement system, which uses a widely tunable coherent THz-wave parametric oscillator source, can image at a specific frequency in the range 1-2 THz. The component patterns of chemicals can easily be extracted by use of the frequency-independent components. This method could be successfully used for nondestructive inspection for the detection of illegal drugs and devices of bioterrorism concealed, e.g., inside mail and packages.