Feasibility study of complex wavefield retrieval in off-axis acoustic holography employing an acousto-optic sensor

We propose and experimentally demonstrate a new method for complex-valued wavefield retrieval in off-axis acoustic holography. The method involves use of an intensity-sensitive acousto-optic (AO) sensor, optimized for use at 3.3 MHz, to record the acoustic hologram and a computational method for reconstruction of the object wavefield. The proposed method may circumvent limitations of conventional implementations of acoustic holography and may facilitate the development of acoustic-holography-based biomedical imaging methods.

► We experimentally demonstrate a method for wavefield retrieval in off-axis acoustic holography. ► An intensity-sensitive, acousto-optic (AO) sensor is employed to record the acoustic hologram. ► A phase-retrieval method is employed to reconstruct the object wavefield. ► The proposed method circumvents limitations of conventional implementations of acoustic holography.