针对闪耀光栅模型光束偏转角度数量分布有限的缺点, 提出一种基于相控阵雷达模型的液晶光束偏转波控方法。该方法控制液晶电极间相位差, 通过改变液晶电极间相位差控制出射光波束方向。使用傅里叶光学方法推导该模型最大偏转角度、光束偏转角度与电极间调制相位关系以及衍射效率和偏转角度的关系。实验证明该方法可实现任意分辨角的光波束扫描,在0.15°光束扫描范围内实现优于20 μrad的连续光束偏转。

The steering approach of blazed grating limits the number and distribution of deflection angles of beam.Aiming at this disadvantage, a new liquid-crystal beam deflection wave control method based on phased-array radar model is proposed. The method controls the same phase difference between liquid crystal electrodes.The beam direction can be controlled by changing phase difference between liquid crystal electrodes.Finally, it is proved by experiment that this method can realize beam scanning with arbitrary resolution,continuous beam deflection accuracy is better than 20 μrad within the range of 015° light beam scanning.