大气泡散射的几何物理模型数值计算

米氏模型和德拜级数展开模型在气泡尺寸达到μm量级时不能很好地解释海水中大尺寸空泡的后向散射现象，计算速度较慢且容易溢出。提出使用几何物理光学模型解释大尺寸空泡的后向散射现象，给出了一种基于几何物理光学模型的球形大气泡散射特性的数值计算方法，并与德拜级数展开式进行了比较，计算结果基本吻合。该方法在计算大尺寸空泡的后向散射时不受微粒尺寸参数和折射率的限制，且避免了复杂的级数形式，与基于米散射理论或德拜级数展开的算法相比，具有更快的运算速度。最后给出了一些计算实例。

Numerical calculation of light scattering caused by large spherical bubbles with geometrical physical model

Since Mie model and Debye-series expansion model can not accurately explain the back scattering phenomenon of large dimensional bubbles in seawater when the size of the bubbles reaches micron order of magnitude and their calculation speeds are slow,a geometrical-physical optical model is put forward.The numerical calculation method of the scattering property for the large spherical bubbles,based on geometrical-physical optical model, is described.In comparison with Debye model,the calculation result of the geometrical-physical optical model agrees with Debye model basically.The calculation process of the method is independent of size parameters,and it is more stable and faster than the traditional methods based on Lorenz-Mie theory or Debye-series expansion.Some calculation results for the angular distributions of the scattering intensity are also given.