Hologram Optimisation Using Liquid Crystal Modelling
Hologram Optimisation Using Liquid Crystal Modelling
复制标题
使用液晶建模的全息图优化
DOI：
10.1080/15421400590955659
复制
发表时间：
2005
影响因子：
0.7
通讯作者：
W. Crossland
中科院分区：
文献类型：
--
作者：
A. Georgiou;M. Komarčević;T. Wilkinson;W. Crossland
通信网络中使用的波束控制液晶器件存在高串扰的问题。这是由于液晶弹性变形的有限程度和电场条纹造成的分辨率有限。在本文中，我们展示了非周期相位元件（全息图）如何减少串扰。根据全息图迭代设计算法的要求，设计了一种新的计算近似液晶相位轮廓的模型，计算速度比有限元法快许多倍，可计算数百万次。与周期光栅相比，使用新模型设计的全息图具有更好的性能和灵活性。
ABSTRACT Beam steering liquid crystal devices employed in telecommunication networks suffer from high crosstalk. This is due to the limited resolution arising from the finite extent of the liquid crystal elastic deformation and the electric field fringing. In this paper we show how non-periodic phase elements (holograms) can reduce crosstalk. A new model is devised to evaluate the approximate liquid crystal phase profile that is many times faster than the finite element method, enabling its evaluation millions of times as it is required by the hologram iterative design algorithms. Holograms designed using the new model had improved performance and flexibility compared to periodic gratings.