基于Mie光散射理论的尾流气泡前向散射光特性研究

实验中利用CMOS图像传感器代替传统的光电探测器接受前向散射光,由几何光学和图像处理分析得出不同散射角的散射光与采集图像中的光环相对应.通过计算各个光环的所有像素值的总和就可以得到前向散射光光强的相对值,进而可以得出前向散射光光强变化规律.根据米氏（Mie）光散射理论可以计算出气泡各个方向的散射光光强,通过比较实验结果和Mie理论计算结果可以看出,采用CMOS图像传感器探测和图像处理技术可以准确地得出散射光强度的变化规律.

Study of Character of the Forward Scattered Light of Bubbles Based on Mie's Light Scattering Theory

The forward scattering light is accepted by CMOS instead of traditional photoelectric detector in the experiment. The scattering lights in different scattered angles are related to the different light rings in the collection images after analyzing in geometry optics and image processing technology. The arbitrary intensity of scattering light can be acquired by calculating the pixel value of different light rings, and the transformation of scattering light can be acquired. The intensity of scattering light of bubbles can be calculated in all angles by Mie′s light scattering theory. By comparing the results of experiment and Mie′s theory, the transformation of scattering light intensity can be acquired exactly by using CMOS and image processing.