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- W170872740 abstract "This paper presents a new concept of signal processing in acoustical focused image holography, named “digital accustical holography”. Presented here is a method based on time coincidence measurement between digitized reflected pulses and digital clock pulses for phase detection instead of heterodyne phase detection used in conventional acoustical holography. This digital phase detection permits the use of a wide band (spike shaped) transmitted pulse which increases the depth resolution remarkably. Furthermore, fringe representation corresponding to the deviation in the propagation path length of less than half a wave length can be easily achieved by changing the clock pulse frequency independently of the carrier frequency of the transmitted waves." @default.
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- W170872740 date "1980-01-01" @default.
- W170872740 modified "2023-09-24" @default.
- W170872740 title "Digital Signal Processing in Acoustical Focused Image Holography" @default.
- W170872740 cites W4214509663 @default.
- W170872740 doi "https://doi.org/10.1007/978-1-4613-2943-5_42" @default.
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