Measurement from the nearfield of an ultrasonically produced phase grating
Measurement from the nearfield of an ultrasonically produced phase grating
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从超声波产生的相位光栅的近场进行测量
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
B. D. Cook
中科院分区：
文献类型：
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作者：
B. D. Cook
正弦波相位光栅近场的光学辐照度是一个复杂的图形，具有一定的对称性和周期性。这个辐照度的简化表达式已经被开发出来。将此表达式应用于超声产生的相位光栅，可以解释延迟大小（拉曼-纳特参数）和相位光栅位置的文件实验数据。该技术适用于脉冲超声波，可用于峰值和平均声压和功率测量。[这项研究得到了美国食品和药物管理局（FDA）放射卫生局的支持。]
The optical irradiance in the nearfield of a sinusoid phase grating is a complex pattern exhibiting certain symmetries and periodicities. A simplified expression for this irradiance has been developed. Application of this expression to an ultrasonically produced phase grating permits interpretation of file perimental data for the magnitude of the retardation (Raman‐Nath parameter) and location of the phase grating. This technique is applicable to pulsed ultrasonic waves and can be used for acoustic pressure and power measurements, both peak and average. [This research was supported by the Bureau of Radiological Health, FDA.]