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本文用雅明干涉仪测定第一次离子交换后的径向折射率分布，边缘部分与理想分布有极大的偏差．在此基础上并进行了第二步高于交换，测定其边缘分布有进一步改进，同时，第二次成象比第一次有明显的改善．
In this paper, the refractive index distribution of the first ion exchange after the first ion exchange was measured by the Arming Interferometer, and the edge part has a great deviation from the ideal distribution. On this basis, the second step is higher than the exchange, and the edge distribution is further improved. At the same time, the second image has a significant improvement over the first time.