POV-Ray，全名是Persistence of Vision Raytracer，是一个使用光线跟踪绘制三维图像的开放源代码免费软件。-POV-Ray, full name is the Persistence of Vision Raytracer, the use of ray tracing is a rendering of three-dimensional images of the open-source free software.

利用Pov-ray，实现光学中Ray Tracing, 反射，折射，