Fig. 4: Performance of the 10,000-element spatial ultrasound modulator. | Nature Communications

Fig. 4: Performance of the 10,000-element spatial ultrasound modulator.

From: Spatial ultrasound modulation by digitally controlling microbubble arrays

Fig. 4

Calculation of the phase hologram for the target image (a) and the corresponding phase front in the plane of the hologram (d). Calculations are based on the iterative angular spectrum method, and the phase distribution at the hologram plane is modified upon the back-propagation from the target acoustic amplitude field (top right inset). Comparison of the same target in a binary amplitude hologram (b, e). The experimental result showing the hydrophone scan (c) of the acoustic field in the target plane, which is generated by the bubble array in the hologram plane of the SUM (f). All scale bars are 1 mm.

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