<b>Strobe Photo-elastic Visualization of Ultrasound Propagation in the Residual Stress Field of the Solid </b>

Sensitive tint visualization system for Lamb waves propagation in a glass plate

“…Thereby, the time transition of ultrasonic waves propagation can be observed by varying the delay time ÁT of the delay unit. In the imaging process, the differential method [19][20][21], in which the sound-off image is subtracted from the sound-on image was used to enhance the contrast of the image. Figures 3(a)-3(d) show ultrasonic waves propagation images of 30-cycle S0-mode burst sine Lamb waves for delay times, ÁT, of 14 ms, 18 ms, 26 ms and 38 ms, respectively.…”