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研究了电寻址空间光调制器中由于低开口率所引起的“黑栅”效应对图像质量的影响。提出了一种基于纯相位型光束整形器件阵列的“黑栅”消除方法,并分析了该方法的基本原理。介绍了用Gerchberg Saxton相位恢复算法来设计光束整形器件的基本思路,给出了光束整形的结果。理论分析及仿真计算表明,该方法能有效地消除电寻址空间光调制器相邻像素之间的黑带。
The effect of “black gate ” effect on the image quality caused by the low aperture ratio in the electrical addressable spatial light modulator was studied. A “black-grid” elimination method based on a pure phase-shaped beam shaping device array is proposed, and the basic principle of the method is analyzed. The basic idea of designing a beam shaping device with the Gerchberg Saxton phase recovery algorithm is introduced, and the result of beam shaping is given. Theoretical analysis and simulation results show that this method can effectively eliminate the black band between adjacent pixels in the electrical addressable spatial light modulator.