refractive

Efficacy measures include axial length， keratometric power and mean absolute refractive error.

有效测量值包括轴长度，角膜曲率和绝对屈光误差值等内容。

Using the characteristic of refractive index are smaller than 1 in the reststrahlen band,we can produce photonic crystal having forbidden band in the middle infrared and far infrared.

由此可知利用材料在剩余射线带内折射率小于1的特性，我们可以制备出中红外区和远红外区存在禁带的光子晶体。

In this thesis, the plane wave expansion method is used to get the equifrequency surface.The anomalous refractive properties of photonic crystal are analyzed by using the equifrequency surface.

中文摘要光子晶体是由周期性所组成的，若经由适度的设计则具备改变光波传递的效果。

Incorporating array of metallic wires into the host media, such as ferrimagnet YIG under an external magnetic bias field, is a novel method to synthesize negative refractive index (NRI) material.

摘要以亚铁磁煤质-YIG为基体，在其中嵌入金属导体线阵列是人工合成负折射率微波媒质的一种新方法。