Abstract
In order to develop a sensitive but fast acoustic holographic system a translated-circular scanner has been constructed. The properties of the two-dimensional Fourier transform of the translated-circular sampling function show that this system can tolerate coarser sampling than the rectilinear system. A recording of an acoustic hologram of a 250 mm spanner has been made in 150 s using a single 2 MHz transmitter/receiver and sampling every 3.3 wavelengths. A method of further decreasing the recording time by the use of 3 sets of probes is also discussed.
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