Spherical shock waveform reconstruction by heterodyne interferometry

• DOI: 10.1121/10.0024520
• Publication Date: 2024-01-29T13:34:26Z
• Authors: Carl R. Hart; Gregory W. Lyons; Michael J. White
• Keywords: 03 medical and health sciences; 0302 clinical medicine

The indirect measurement of shock waveforms by acousto-optic sensing requires a method to reconstruct the field from projected data. Under assumption spherical symmetry, one approach is Abel inversion integral transform. When modality measures change in optical phase difference time derivative, as for heterodyne Mach–Zehnder interferometer, e.g., laser Doppler vibrometer, reconstructed fluctuating refractive index derivative. A technique derived that reconstructs directly assuming plane wave propagation local probe beam. With synthetic data, this compared transform and then applied experimental data laser-induced shockwaves. Time are with greater accuracy except tail waveform maps spatially positions near virtual origin. Furthermore, direct reconstruction eliminates required integration results more accurate peak values, rise times, positive duration.