【摘要】 通过对超声调制相干光的研究,提出了一种利用超声调制的光信号测量超声在弱光散射介质中速度的方法。这种测量方法无需接触待测介质且可在远距离进行测量。在介质外测量超声调制的相干光信号,然后采用相位比较法或李萨如图法就可以准确获得超声在介质中的速度。采用此方法测量超声在蒸馏水中的速度,测量结果为1460m/s,与实际值吻合。更多还原

【Abstract】 By studying on the ultrasonic modulation of coherent light,a method for measuring the ultrasonic velocity in the weakly optically scattering media is presented by using the ultrasound-modulated light.This method does not need to contact the medium.The ultrasonic velocity can be measured remotely by the method.The ultrasound-modulated light is measured outside the media and then the ultrasonic velocity of the medium is obtained accurately by the phase-comparison method or Lissajousfigure method.This method is used to measure the ultrasonic velocity in distilled water.The measured value is 1460m/s,which is in agreement with the actual value.更多还原