Time-resolved imaging of ultrasound waveform with synchronized laser illumination

Subir Das, Yun Yu Hsu, Ying Rue Kao, Bao Yu Hsieh*, Fu Jen Kao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We present a synchronous time delay technique to precisely control the illuminating laser pulses and the ultrasonic wave generation to visualize the ultrasound waveform through the Schlieren imaging method. The proposed time-resolved imaging technique offers the two-dimensional mapping of ultrasound waveform in a temporally evolved manner. The critical physical parameters, such as speed and spatial pulse length of ultrasonic waves, are visualized and calculated from image analysis. Our results suggest a protocol in characterizing ultrasound waveform, and it has the potential to reconstruct the acoustic field by accumulating the time-lapse waveforms.

Original languageEnglish
Article number074102
JournalApplied Physics Letters
Issue number7
StatePublished - 14 Feb 2022


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