Multiple beam lens transducer with collimator for sonar systems

摘要

A compact apparatus for transmitting and receiving multiple sonar beams utilises an acoustic lens (25) to direct plane waves incident in desired directions to collimating lenses (32) for presentation in phase to electroacustic transducers (30) having planar surfaces. The electroacoustic transducers (30) emit sound waves which are transformed by the lenses (32) into plane waves emergent in the desired directions.