【摘要】 针对数字全息中零级像和共轭像的存在影响数字再现像的质量这一问题 ,采用四步相移方法 ,对离轴数字全息图采用相加运算处理 ,能较好地去除零级像及共轭像 ,提高了信噪比 ,从而提高了再现像质量 .更多还原

【Abstract】 Aiming at the question that the existence of zero-order image and conjugate image has certain effect on the quality of reconstructed images in digital holography, a method of four-step phase-shifting digital holography is presented, in which four phase-shifting off-axis digital holograms are made to add operation, and zero-order image and conjugate image are preferably eliminated. Not only is the signal-noise ratio improved, but also the quality of reconstructed images is enhanced.更多还原