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《Acta Optica Sinica》 2010-03
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Research on Ray Tracing Method in 3D Discrete Space with Discretionary Refraction Index

Feng Dinghua Pan Sha Tian Zhengyu Li Hua (College of Aerospace and Material Engineering,National University of Defense Technology, Changsha,Hunan 410073,China)  
The Runge-Kutta ray tracing method is introduced firstly,which is used as a basic ray tracing method for the medium of the discretionary refraction index distribution.Then towards the three-dimensional fluid field with the characteristic of discrete refraction index distribution,a numerical computation method of any point's refraction index and gradient is proposed.During the process of ray tracing,an idea and method that tracing step distance is self-adaptive according to local refraction index gradient and grid geometry scale are carried out,which can improve the tracing precision and efficiency.The results show that the method has high precision and efficiency for the ray tracing of three-dimensional space with the discrete refraction index distribution.
【Fund】: 国防科技大学优秀研究生创新项目(B080103)资助课题
【CateGory Index】: O435.1
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