One was recorded when a high voltage was put on the electron biprism and another was recorded after the voltage of the electron biprism returned to zero.

• 在图像相减的数据处理过程中，同时使零级衍射谱的总能量趋于最小值的迭代算法来消除记录过程中全息图和像强度图之间可能存在的能量和位置偏差。