激光在水中气泡微粒的后向散射特性

Laser Backscattering Characteristics of Bubbles in Water

从激光能量、目标位置、视场大小及气泡厚度等方面对气泡后向散射特性进行研究。采用实验方法研究脉冲激光气泡后向散射特性。实验结果表明,增大激光能量在一定程度上可以有效地改善气泡探测的效果,而气泡发生器位置和视场的合理选择使得气泡探测更容易些,气泡区域厚度的变化对气泡后向散射并没有明显的影响。该实验结论与蒙特卡洛数值模拟的结果一致。

The experimental studies on the backscattering light of bubble is introduced. Through classifying various experimental parameters including laser energy, target position, receiver view of field, and bubble area thickness, the effects of these parameters on bubble backscattering are analyzed. The laser backscattering characteristics of bubble are analyzed by experiment. Firstly, the experiment results show that higher laser power can efficiently improves the detection of bubble. Secondly, the appropriate choice of target position and receiver view of field helps in the bubble detection. Thirdly,the variance of thickness of bubble layer has no effect on the backscattering light of bubble. The comparison of the experimental resuits and Monte Carlo simulation demonstrates the validity of the experiment.