Abstract
A preliminary model of a novel acoustic image sensor which utilizes a multiplexed area array of transducers operating in a transmit-receive mode has been developed. The major components of the system include: 1) an acoustic lens for focusing the transmitted energy of an array element on the corresponding object element, 2) an area or two-dimensional array of acoustic transducers formed within a monolithic wafer of piezoelectric ceramic material; 3) an array of silicon monolithic integrated circuits located immediately adjacent to the piezoelectric array; each integrated circuit performs the transmit/receive multiplexing for several transducer array elements; 4) an analogue signal processor consisting of high power transmit circuitry as well as sensitive receiver circuitry including preamplifiers, swept gain amplifiers and function generators, filters, gain compressors and detectors; 5) a digital controller which permits a) any single array element or any row or column of array elements to operate in the A-scan mode, b) any row or column of array elements to operate in the B-scan mode or c) the full array of elements to operate in the C-scan mode; and 6) a display subsystem consisting of a cathode ray display and interface circuitry which provides an M-scan mode and interpolation in the C-scan mode. The image sensor operates at an acoustic frequency of 3.5 MHz and is intended for use in medical diagnostics.
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References
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© 1974 Springer Science+Business Media New York
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Maginness, M.G., Plummer, J.D., Meindl, J.D. (1974). An Acoustic Image Sensor Using a Transmit-Receive Array. In: Green, P.S. (eds) Acoustical Holography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-0827-1_36
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DOI: https://doi.org/10.1007/978-1-4757-0827-1_36
Publisher Name: Springer, Boston, MA
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