Fig. 8: Video of explosively generated hypersonic fragments collected at 2 MHz.
From: Megahertz-rate shock-wave distortion cancellation via phase conjugate digital in-line holography
Columns from left to right show DIH, PCDIH, and tracked PCDIH videos of the hypersonic fragments and surrounding shock-wave distortions. Late-arriving fragments generated by an explosive detonator are obscured by shock-wave phase distortion interference patterns. However, the fragments are visible and can be tracked in the PCDIH images to estimate size, three-dimensional position (z-location illustrated by outline color), and velocity. All holograms are numerically refocused to the center of the fragment field. Supplementary Movie 3 illustrates this experiment.
