In Chapter 2, the refractive index distribution and ray trajectory of GRIN ball lens are studied in theory.
第二章主要从理论方面研究梯度折射率球透镜的折射率和光线轨迹。
GRIN ball lens is a spherical optical element with refractive index is symmetric around a spherical point and varies in spherical radius direction.
梯度折射率球透镜是一种折射率以球心为对称中心，并沿球半径方向分布的球型光学元件。
At last, the author obtained the equation of ray trace in the GRIN ball lens with the index profile which is quadratic and drew some important conclusions.
研究了二次抛物线型的GRIN球透镜的光线轨迹方程序；得出其轨迹为椭圆曲线及一些重要结论。
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