The imaging characteristics of a GRIN fiber lens with exponential variationof the constant-index surfaces are discussed based on the ray paths equations.
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。
2
A small variationof the Verdet constant with temperature that was associated with the volume expansion of the sample was observed.
观测到费尔德常数随温度的微弱变化，而这种变化是同样品的体积膨胀相联系的。
3
Moreover, the expansion ratio of scale factor and the variation ratio of string coupling constant are calculated.