鉴定小麦种子纯度的新型光谱技术

The New Spectroscopy Technology Used for Identification of Different Wheat Seeds

介绍了一种用于小麦种子纯度鉴定的新型光谱技术-太赫兹时域光谱技术。基于光学整流原理,设计了太赫兹时域光谱实验装置,并通过测试水蒸汽的频谱,验证了太赫兹时域光谱系统具有很高的频谱分辨率,可达到0.0001THz,可以用在对小麦种子的纯度鉴别领域。

In this paper, a new spectroscopy technology named terahertz time- domain spectroscopy （THz- TDS） is introduced, which is used for identification of different wheat seeds. We describe a coherent subpicosecond THz spectroscopy system based on non - resonant optical rectification for the generation of THz radiation. As an example, we measured absorption spectrum of water vapor by THz - TDS in frequency from 0.5 to 2.5 THz, The experiment demonstrated that the spectroscopy resolution of system was up to 0.0001THz, which can be used for identification of different wheat seeds.