为了保证采样的独立性，目前基于随机相位板的赝热光鬼成像系统是以每次移动不小于一个激光光斑大小进行相位调制的形式来产生高亮度的赝热光源。通过旋转、平移两台电机控制随机相位板的运动轨迹，搭建了一种运动轨迹可调的随机相位板赝热光鬼成像实验平台。基于差分鬼成像和稀疏约束鬼成像重构算法，从实验角度对比分析了随机相位板的偏移量Δx 对赝热光鬼成像质量的影响。数值模拟和实验结果均表明，在相同的采样压缩比下，当随机相位板的偏移量Δx 不大于物面处的散斑大小Δxs 时，成像质量随着Δx 的增大而提高；而当Δx 大于Δxs时，随着Δx 的增大，成像质量几乎不变。此外，稀疏约束鬼成像质量优于相同采样数下的差分鬼成像质量。

In order to ensure the independence of every sampling, ghost imaging system with repeatable pseudothermal light based on random phase plate moves one laser spot in each sampling to produce pseudo-thermal light. By using rotating motor and linear motor to control motion trail of random phase plate, an experimental platform is established. Based on differential ghost imaging linear reconstruction algorithm and nonlinear sparsity constraints reconstruction algorithm, the influence of different offset value Δx of the random phase plate on the quality of ghost imaging is studied researched. The results of the simulation and experimental results demonstrate that in the case of the same compression ratio, when Δx is no more than the speckle size Δxs , the imaging quality enhances with increasing Δx , and when Δx is larger than Δxs , the imaging quality almost does not change with increasing Δx. Besides, in the case of the same sampling, the imaging quality by using nonlinear sparsity constraints reconstruction algorithm is better than that by using differential ghost imaging linear reconstruction algorithm.