1.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。
2.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结构所组成的结构,由适度的设计则具备改变光波传递的效果。
3.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.
4.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.