Yu Haitao, Xu Feng, Tropea Cameron
Opt Express. 2013 Nov 4;21(22):25761-71. doi: 10.1364/OE.21.025761.
A vector ray tracing (VRT) model is developed to simulate optical caustic structures in the primary rainbow region of light scattering from oblate droplets. The changes of the optical caustic structures in response to shape deformation of oblate droplets are investigated. Then the curvature calculated from the simulated rainbow fringes is compared with that from the measured rainbow fringes and good agreement is found. Furthermore, according to the generalized rainbow patterns and the relation between aspect ratio and curvature of the rainbow fringe, non-sphericities in terms of aspect ratio of an oblate water droplet is measured with high measurement accuracy.
开发了一种矢量光线追踪（VRT）模型，以模拟扁球形液滴光散射的初级彩虹区域中的光学焦散结构。研究了光学焦散结构响应扁球形液滴形状变形的变化。然后将从模拟彩虹条纹计算出的曲率与从测量彩虹条纹计算出的曲率进行比较，发现两者吻合良好。此外，根据广义彩虹图案以及彩虹条纹的纵横比与曲率之间的关系，以高测量精度测量了扁球形水滴纵横比方面的非球形度。
