Experimental Results from an Underwater Acoustical Holographic System
This paper describes the system design, fabrication, and preliminary results obtained from an experimental laboratory model of an underwater holographic system whose operation was previously simulated by computer.1 The model has a linear-array receiver with 100 channels and a cylindrical insonifying transducer. The receiver array and the insonifying transducer scan simultaneously. The holographic information is processed in parallel by 100 distinct electronic channels and is then displayed by a scanning linear array of 100 light-emitting diodes.
The resulting images demonstrate that a properly designed cylindrical insonifying transducer can be used to produce holograms while scanning which are of the same quality as those produced by a stationary transmitter. With this method, no special techniques, i.e. no techniques other than those conventionally used, are required to reconstruct the image.
KeywordsLead Array Electronic Board Electronic Reference Acoustical Holographic Experimental Laboratory Model
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