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10 April 1997 Higher order diffracting-grating transducers
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A new method of blood-flow measurement requires construction of transducers that act like diffraction gratings, producing beams at variable angles as a function of the signals driving them. A new transducer structure that eases fabrication and operation of such transducers is presented and its operation experimentally verified. This transducer is called a higher-order diffracting-grating transducer because, like a higher-order optical diffraction grating, the periodicity of its elements is based on a multiple number of wavelengths. The theory and experimental results for this new transducer structure are shown to agree.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David H. R. Vilkomerson, Thomas Chilipka, and David Lyons "Higher order diffracting-grating transducers", Proc. SPIE 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering, (10 April 1997);

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