By B. P. Hildebrand
Because the first papers via E. N. Leith and J. Upatnieks near to holography seemed in 1961, there was a digital explosion of study job within the box. greater than SOO papers and articles on holo graphy have seemed within the final ten years. Many purposes of holo graphy were proposed, and a few of those are commencing to input the area of usefulness. one of many functions that looks to carry nice promise is acoustic imaging by way of holography. the 1st papers in this topic seemed in 1966. yet already learn job within the box is burgeoning. Tbree symposia whoUy dedicated to acoustical holography were held and tbe papers released in booklet shape. the aim of this booklet is to collect the result of examine in acoustical holography, a few of it as but unpublished, below one hide in order that staff in holography, nondestructive checking out, clinical imaging, underwater imaging, and seismic exploration can come to a decision even if this new method should be beneficial to them.
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