Diffraction-grating transducers

D. Vilkomerson, D. Lyons, T. Chilipka, P. Lopath, K. Shung
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引用次数: 9

Abstract

Diffraction grating transducers, like optical diffraction gratings, produce beams at different angles for different frequencies. They transmit and receive what would be considered the grating lobe for conventional array transducers. Diffraction-grating transducers were developed to produce multiple beams at known angles so that angle-independent Doppler measurements could be made. The theory of operation of first and higher-order diffraction-grating transducers is presented, including the parameters that affect beam resolution and operating distance. A method to fabricate these transducers like composite transducers is outlined, and experimental results presented.
衍射光栅传感器
衍射光栅换能器与光学衍射光栅一样,在不同频率下产生不同角度的光束。它们发射和接收被认为是传统阵列换能器的光栅瓣。衍射光栅换能器被开发出来以在已知的角度产生多个光束,这样就可以进行与角度无关的多普勒测量。介绍了一阶和高阶衍射光栅换能器的工作原理,包括影响光束分辨率和工作距离的参数。提出了一种类似复合换能器的制造方法,并给出了实验结果。
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