THE APPLICATION OF PHASE RECOVERY TECHNIQUES TO THE DETERMINATION OF TRANSDUCER SOURCE DISTRIBUTIONS

This paper presents the results of further investigations on the appli cability of phase recovery techniques to the determination of ultrason ic transducer source distributions, following on from the initial inve stigations reported by Hurrell [1]. The work described here includes t he results of a reconstruction from measurements of the radiated press ure field amplitude from a far from ideal focused transducer, which re presents an extremely demanding test of the reconstruction algorithm. These results are compared with those obtained from the well-known bac k-projection method [2].