液晶空间光调制器与相干光波前实时变换

介绍了一种利用纯相位调制液晶空间光调制器进行波前相位实时变换的方法，可将相干平面波变换成任意期望的波前。该方法采用由伪随机编码产生初始相位矩阵的相位恢复优化算法，从期望的远场衍射图形得到液晶空间光调制器所在衍射面的相位分布，当单色相干平面波通过液晶空间光调制器时，利用液晶空间光调制器纯相位调制特性复现该相位分布，在远场产生期望的衍射图形。实验验证了上述波前实时变换的可行性。

Liquid crystal spatial light modulator and real-time transform of interferential light wave front

A method that wave front real-time transform by using phase only liquid crystal spatial light modulator (LCSLM) is proposed, which may change the interferential planar light wave front to an arbitrary expected wave front. The method employs an optimal phase recovering algorithm, the initial phase array of which is produced by pseudorandom phase encoding. The phase distribution of the LCSLM is obtained from expected diffraction patterns of far field. The incident monochromatic interferential planar wave on the LCSLM will produce the expected diffraction patterns in far field according to the phase only modulation characteristics of the LCSLM.The feasibility of the transform above is proved by experiments.