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ULTRASONIC ECHOGRAPH UTILIZING AT LEAST ONE PIEZOELECTRIC TRANSDUCER WITH AN ASSOCIATED RANDOM PHASE SCREEN, AND METHOD OF SCANNING AN OBJECT BY MEANS OF SUCH AN ECHOGRAPH
ULTRASONIC ECHOGRAPH UTILIZING AT LEAST ONE PIEZOELECTRIC TRANSDUCER WITH AN ASSOCIATED RANDOM PHASE SCREEN, AND METHOD OF SCANNING AN OBJECT BY MEANS OF SUCH AN ECHOGRAPH
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机译:带有关联的随机相位屏幕的至少一个压电换能器的超声回波及通过这种回波手段扫描物体的方法
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摘要
The apparatus consists of at least one piezoelectric transducer (10, 13) providing for the emission and/or the reception of an ultrasonic beam (20) used for examination. A phase-randomising screen (11) located in the ultrasonic beam (20) used for examination and movable with respect to the axis of this beam is associated with at least one piezoelectric transducer (10). A system is provided for recording one echographic line e(t) for each position ( alpha ) of the said phase-randomising screen (11). The main technical effect of the presence of the phase-randomising screen on the ultrasonic path is to destroy the coherence of the wave passing through this screen. …??Application especially to medical ultrasonic echography and to the non-destructive testing of materials. …IMAGE…
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