Measurements of S0 mode Lamb waves using a high-speed polarization camera to detect damage in transparent materials during non-contact excitation based on a laser-induced plasma shock wave
Measurements of S0 mode Lamb waves using a high-speed polarization camera to detect damage in transparent materials during non-contact excitation based on a laser-induced plasma shock wave
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DOI：
10.1016/j.optlaseng.2021.106770
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发表时间：
2021-08-24
影响因子：
4.6
通讯作者：
Kanda, Atsushi
中科院分区：
文献类型：
--
作者：
Hosoya, Naoki;Katsumata, Tsubasa;Kanda, Atsushi
由于透明材料在太阳能电池板、平板终端和智能手机等产品中的普遍存在，对透明材料的需求一直在扩大。为了大规模生产高质量的产品，快速检测μ m级的损坏并评估质量至关重要。本文采用纳秒级Nd：YAG脉冲激光器，通过激光诱导等离子体产生冲击波，作为透明材料的非接触、非破坏性激发力。然后，高速偏振相机测量所产生的兰姆波。在这个实验中，脉冲输入产生通过激光诱导等离子体冲击波和所产生的兰姆波在聚碳酸酯板中的相速度测量由高速偏振相机。我们发现这种兰姆波是在S0模式。观察其传播可以以非接触、非破坏性的方式检测透明板表面上数百μ m量级的划痕。
The demand for transparent materials has been expanding due to their ubiquity in products such as solar panels, tablet terminals, and smartphones. To mass produce high-quality products, quickly detecting damage on the mu m scale and evaluating the quality are critical. Herein an Nd:YAG pulsed laser with a nanosecond order is used to generate a shock wave by laser induced plasma, which is subsequently used as a non-contact, non-destructive excitation force for transparent materials. Then, a high-speed polarization camera measures the generated Lamb wave. In this experiment, an impulse input is generated via a laser-induced plasma shock wave and the phase velocity of the generated Lamb wave in the polycarbonate plate is measured by a high-speed polarization camera. We found that this Lamb wave was in the S0 mode. Observing its propagation can detect scratches on the order of several hundred mu m on the surface of a transparent plate in a non-contact, non-destructive manner.