refractive

Refractive index is the essential parameter of tissular optical characteristics.

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

The visual acuity (VA). refractive power, keratometer were recorded 1 day before and 1 day.

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.

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.

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.

2 T he convers ion from negative lens effect topos itive lens effect in non linear refraction.(a)T he change of non linear refractive index onax is w ith z;