中文摘要：

利用两次离子交换法制作了GRIN棒透镜样品,并采用雅明干涉法对样品的折射率分布进行了测试.结果表明,样品获得了较大的折射率差值.讨论了两次离子交换增大折射率差的原因.研究结果在制作生产梯度折射率材料方面有一定的参考价值和指导意义.

英文摘要：

The GRIN-rod lenses are made by two steps ion-exchanging, and the refractive index distribution of the sample is measured by the YaMing interferometer. The results show large differences in the refractive index of the samples. The reason for the increase of the refractive index difference by two-step ion-exchanging is discussed. The results of this research may help to produce GRIN materials.