二元光学液晶闪耀光栅的特性分析  

Characteristics Analysis of Binary Optic Liquid Crystal Blazed Grating

作　　者：张翠玉[1] 黄子强[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光学学报》2008年第7期1231-1235,共5页Acta Optica Sinica

基　　金："十一五"预研基金(H04010201W0207150)资助课题

摘　　要：在二元光学理论的基础上，结合波动光学理论和液晶指向矢的计算提出一种新的二元光学液晶闪耀光栅设计。对液品光栅电极施加阶梯分布的电压使之形成相位阶梯形分布，推导出液晶闪耀光栅的衍射效率。结果表明，通过改变周期单元光栅电极数目而改变光栅常数，可以改变光衍射角度，一级衍射角度调节范围可达0°～10°；调节电极电压可以使特定级次衍射光效率达到90％以上，使该级次得到闪耀。Based on binary optics, a new binary optic liquid crystal blazed grating was proposed by combining wave optics and liquid crystal orientation vector theories. Step-shaped phase was obtained by applying a step-shaped voltage on liquid crystal grating electrode and its diffraction efficiency is derived. By changing the number of steps in one unit, the diffraction angle is changed. The maximum diffraction efficiency can exceed 90 % and form blazed grating at this order. The range of the first order of diffraction angle is 0°-10°.

关 键 词：光学器件 液品闪耀光栅 衍射效率 衍射角 

分 类 号：O438.1[机械工程—光学工程]