Title: Acoustical imaging system

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Abstract: An improved system for ensonifying an object, which comprises upper and lower fluid-filled chambers. The chambers are separated by a partition including a lens; a further, movable lens may be disposed within the upper chamber. A reflective-type detector is disposed in the floor of the bottom chamber, and ports provided at opposite sides of the chamber for light impinging upon, and reflected from, the detector surface. A resilient closure at the upper end of the upper chamber conformably receives the surface of an object to be ensonified. A transducer producing the object, or ensonifying, acoustic beam is disposed within another fluid-filled enclosure one wall of which comprises a flexible membrane. The latter membrane is disposed against the upper side of the object to be ensonified and conforms thereto so that a relatively continuous fluid path is presented between the transducer and the object, and from the object to the detector. In a preferred embodiment, a reference acoustic beam is produced by another transducer disposed within the lower chamber, the angle between the object and reference beams which impinge upon the detector advantageously being at least 60.degree. to 75.degree..


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