Removing the Residual Zeroth-Order Diffraction Wave in Polarization-Based Parallel Phase-Shifting Digital Holography System

摘要

Although we have constructed parallel phase-shifting digital holography systems using an array of micropolarizers, we found that the zeroth-order diffraction wave was not removed completely. Then, we report the reason why the zeroth-order diffraction wave is not always removed completely and propose an algorithm to remove the residual zeroth-order diffraction wave. In the algorithm, phase-shifted holograms obtained by parallel phase-shifting digital holography and the intensity distribution of the reference wave are divided into segments and the pixel values in the segments are multiplied by proper correction constants. The effectiveness of the proposed algorithm was experimentally verified.