The uniform inclined perpendicular alignment was successfully obtained by inclined evaporation method and using unpolarized uv light method . it is the first time to observe the tilt direction changes in photo - induced alignment when the exposure uv energy increases 在光定向中，我们用非偏振方法实现了带预倾角的均匀的垂直定向，并首次用控制曝光强度的方法，获得了不同的倾角方向的多区域定向。
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By computer simulation and calculation , the relation between the reflectivity and the structure parameters of such gratings are presented . these results show that a glass grating can achieve antireflection over almost the whole visible light waveband for unpolarized light , while a silicon grating with a columned grid substrate also can achieve low reflectance over as a broad field of view as a tapered silicon grating structure can , but it can be fabricated more simply 理论分析发现硅基底的圆柱形网格光栅能够在比较大的视场获得比较低的反射率，具有特定参数结构的低反射率硅基底圆柱形网格光栅可以获得与专为大视场设计的金字塔形网格光栅相同的视场角，但它的制作更容易，更简单。
