Abstract
Technological advancements have enhanced the capability of acoustic holography over the years. A major drawback for current techniques is the lack of ability of multiplexing, which has limited their potentials in ultrasound imaging and acoustofluidics. In this work, we propose an algorithm based on an iterative angular spectrum approach to overcome this limit. An optimized phase distribution at the source plane can be obtained which can project multiple acoustic projections at various distances and frequencies. As such, the acoustic fields at the image planes are encoded onto the same source plane and this facilitates the design of 3D printed acoustic kinoforms integrated on a single element transducer. The parameters including the frequency and projection distance to obtain the best performance are tested. The algorithm can be used in conjunction with other optimization strategies to fine tune pressure fields and further improve the image quality. The results are expected to be useful in medical ultrasound and acoustofluidics where complex acoustic field projection is needed.
Published Version
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