塑料检验
聚合物和太赫兹——完美契合
- 许多塑料材料对于太赫兹波是透明的
- 脉冲太赫兹系统可实现非接触式厚度测量
- 太赫兹成像可探测隐藏缺陷
- 推荐系统: TeraFlash pro, 成像拓展组件, TeraFlash smart, TeraScan, TeraSpeed
许多聚合物材料从某种程度上看上去对太赫兹是透明的，该性质成功地被用于非接触式分析和非破坏性测试。脉冲太赫兹辐射通过飞行时间 (TOF)技术获取物件厚度信息，即便在多层样品中仍然可用。每一层材料的前后界面反射的脉冲到达探测器时间差直接正比于相应材料层的厚度。
太赫兹辐射在塑料检测中的应用不仅限于厚度测量。通过利用太赫兹光束扫描样品，可以将一维的表面测量变为可精确定位亚表面裂缝，空隙和分层的三维图像。光谱技术可测定复合材料的吸收系数和折射率，从而揭示其组成成分以及内部结构。太赫兹技术在塑料工业质量和工艺监控中的潜力几乎是无限的。
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- Review paper: Naftaly, M., et al., Industrial applications of terahertz sensing: State of play, Sensors (2019)
- Publication: M. Yahyapour et al., Fastest thickness measurements with a terahertz time-domain system based on electronically controlled optical sampling; Appl. Sciences (2019)
- Conference Abstract: Yahyapour et al., Non-Contact Thickness Measurements with Terahertz Pulses, WCNDT 2016
- Publication: F. Rettich et al., Field intensity detection of individual terahertz pulses at 80 MHz repetition rate; J Infrared Milli. Terahz. Waves 36:7 (2015)
- Publication: N. Vieweg et al., Terahertz-time domain spectrometer with 90 dB peak dynamic range; J Infrared Milli. Terahz. Waves 35:10 (2014)
- Article: M. Lang, et al., Laser-based terahertz generation & applications, Photonik International (2014)
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