Air-coupled laser vibrometry: analysis and applications
Air-coupled laser vibrometry: analysis and applications
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DOI：
10.1364/ao.48.000c33
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发表时间：
2009-03-01
期刊：
影响因子：
1.9
通讯作者：
Busse, Gerd
中科院分区：
文献类型：
--
作者：
Solodov, Igor;Doering, Daniel;Busse, Gerd
从理论上分析了空气中窄激光束与声波的声光互作用。利用空气中的光弹关系导出了由声束的角空间谱分量引起的空气耦合反射振动测量中激光的相位调制。最大的相互作用被发现为零空间传播的垂直于激光束的声学分量。的角度依赖性的成像效率被确定为轴向和非轴向的声学组件与方面的激光束转向在扫描模式。空气耦合振动测量的灵敏度与传统的“多普勒”反射振动测量的线性和非线性空气耦合场的可视化方法的应用程序进行了比较。(C)2008年美国光学学会
Acousto-optic interaction between a narrow laser beam and acoustic waves in air is analyzed theoretically. The photoelastic relation in air is used to derive the phase modulation of laser light in air-coupled reflection vibrometry induced by angular spatial spectral components comprising the acoustic beam. Maximum interaction was found for the zero spatial acoustic component propagating normal to the laser beam. The angular dependence of the imaging efficiency is determined for the axial and non-axial acoustic components with the regard for the laser beam steering in the scanning mode. The sensitivity of air-coupled vibrometry is compared with conventional "Doppler" reflection vibrometry Applications of the methodology for visualization of linear and nonlinear air-coupled fields are demonstrated. (C) 2008 Optical Society of America