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Using spatial and temporal information correlation theory which is different from the idea oftraditional stroboscope geometrie imaging formation,we've described how to obtain the opticalphase figure of UHF acoustic traveling wavefront in space by CW laser beam and convert it into anamplitude figure.We've also described that there is temporal frequency spectrum in spatialfrequency spectrum,and summarized the methods to get a 2-D high contrast optical figure ofacoustic traveling wavefront by correct spatial filtering concepts so as to clarify some confusions inusual acoustic imagng formation explanation. The experiment and some interesting results have been obtained.As an example,we've obtainedsuccessful results for 37.5 MHz ultrasonic traveling wave from not only bulk wave but also SAWdevice.The method is in real time and simple.We may expect that it becomes a method thatpromises well in researches on ultrasonic waves. 相似文献
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