正晶体

当单轴晶体光轴位于波导面内时，对于正单轴晶体，波导的主模是横电波TE0模，任何频率的光波均可激励该模式；

When the crystal optical-axis parallel to the waveguide plane , For the positive uniaxial crystal material , the principal mode of the waveguide is a TE wave , which can be excited by the light at any frequency ;

这个探测器是由两层氧正硅酸镥晶体晶体和位置灵敏型光电倍增管组成。

The detector consists of two layers of LSO crystals and a position sensitive photomultiplier tube .

结论：术后患者的屈光度偏向正是由于晶体后表面被硅油融合后其屈光度的表现。

Conclusion : The postoperative refractive error becomes more plus when the posterior surface of the lens is fused with silicone oil .

以折射率改变为正的光伏晶体为例，讨论在其中形成双色光光伏空间孤子的条件。

We discuss the conditions under which some polychromatic light photovoltaic spatial solitons can be formed in a photorefractive crystal with a positive perturbation refractive index .

掺Yb~（3+）和Nd~（3+）正钒酸钙晶体的光谱性能

Spectrum Properties of Yb ~ ( 3 + ) and Nd ~ ( 3 + ) Doped Calcium Orthovanadate Crystal

也正是由于光子晶体独特的性能和潜在的应用前景，近年来，关于光子晶体的研究引起研究者们广泛兴趣。

Because of the unique properties and potential applications of the photonic crystals , photonic crystals have drawn much attention recently .

从穆斯堡尔谱峰面积法，推算出非正分的磁铁矿晶体结构式，并由此算出其中Fe~（2+）和Fe~（3+）的含量比。

From the peak area method of Mossbauer spectrum , we have deduced the non-stoichiometric crystal structure formulae of magnetites , and subsequently we have calculated the ratio Fe2 + / Fe3 + .