本文根据光线轨迹方程，讨论一种等折射率面为指数型变化的梯度折射率纤维透镜的成象特性。
The imaging characteristics of a GRIN fiber lens with exponential variation of the constant-index surfaces are discussed based on the ray paths equations.
折射指数的大会有所不同半径的电缆，其核心具有恒定或顺利不同折射率称为数控。
The index of refraction of the assembly varies across the radius of the cable, and the core has a constant or smoothly varying index of refraction called nc.
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