In order to characterize gradient structure of copolymers,gradient index was introduced into our reasearch.
梯度指数能够更直观地表现出各种不同分子内和分子间梯度分子的梯度结构特征。
参考来源 - 梯度共聚物梯度结构的表征与鉴别·2,447,543篇论文数据，部分数据来源于NoteExpress
The fabrication and characterization of gradient index planar microlens array is discussed.
讨论了自聚焦平面微透镜阵列的制作工艺及其基本特性。
The accurate expressions to calculate the aberration for two sorts of lens decrease on the increase of gradient index.
严格的数值计算结果表明：两类透镜的纵、横向球差都随折射率梯度的增强而减小。
Based on that the laser rod is equivalent to gradient index rod (GRIN), a new thermal lens focal length expression was achieved.
把激光棒等效为梯度折射率棒，得到了新的热透镜焦距公式。
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