Electronically Simulated Rotating Prism for Ultrasonic Beam Scanning.
Patent, Filed 31 Jul 80, patented 13 Apr 82,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A method and apparatus are described for electronically scanning a spherically focused beam in a c-scan mode using a spiral path rather than a traditional raster scan pattern. Essential to the technique is an electronically simulated rotating ultrasonic prism operating according to the general electrical input equation v o exp i omega o t ia cos omega t . The technique allows use of a single delay line with simple connections and no requirements of multiple mixing.
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