【摘要】 超声波通过介质时会造成介质的局部压缩和伸长而产生弹性应变,该应变随时间和空间作周期性变化,使介质出现疏密相间的现象,如同一个相位光栅.当光通过这一受到超声波扰动的介质时就会发生衍射现象,这种现象称之为声光效应.本文就声光效应中的声光偏转原理和声光调制原理的现象及有关物理量进行定性或定量的分析.更多还原

【Abstract】 When the ultrasonic wave passes a medium, it triggers the medium’s partial compression and ~elongation, elasticity strain hereby happens, which varies with time and space, sparseness and tightness happens in the medium, like a phase optical grating. Diffraction will happen when light passes a medium, which is interfered by ultrasonic wave, this phenomenon is called Acousto-optic Effect. Analysis of Deflection Principle of Acoustics and Optics and Modulation Principle of Acoustics and Optics and relevant physical quality will be qualitatively and quantitatively analyzed in paper.更多还原