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Applied Physics 2023
高斯光束照射下不同粒径的倾斜椭球形液滴光学焦散结构的研究
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Abstract:
基于矢量光线追踪(VRT)模型，推导了高斯光束在液滴内部的传播过程，研究了高斯光束照射下不同粒径大小的倾斜椭球形液滴在一阶彩虹区域内所产生的光学焦散结构(即彩虹条纹和双曲脐条纹)，计算了不同椭球度的液滴彩虹条纹的曲率以及彩虹角的位置，建立了光学焦散特性(主要指彩虹条纹的曲率和彩虹角的位置)与液滴信息的物理关联，为后续的实验测量提供理论支持。
Based on the vector ray tracing (VRT) model, the propagation process of Gaussian beam in the droplet was deduced. The optical caustic structure (i.e. rainbow fringe and hyperbolic umbilic fringe) generated by titled ellipsoidal droplet with different sizes in the first-order rainbow region under the irradiation of Gaussian beam was studied. The curvature of rainbow fringe and the position of rainbow angle of droplet with different ellipsoid were calculated. The physical correlation between the optical caustic properties (mainly referring to the curvature of the rainbow fringe and the posi-tion of the rainbow angle) and the droplet information is established, which provides theoretical support for the subsequent experimental measurement.
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