关键词: 数字全息, 复波恢复, 快速独立分量分析（FastICA）, 零级项和共轭项

Abstract: During the process of reconstruction of digital holography,some common methods such as diffraction and filtration are affected by the zero-order terms and the twin-image,so the loss of the amplitude and phase information of the complex-wave is unavoidable,and we can’t retrieve the complex-wave effectively.This paper adopts the method of Fast Independent Component Analysis to retrieve the complex-wave.At the beginning,we can capture three frames of holograms of the same object as the observed signal,secondly,separate the information which only includes the amplitude and the phase from the observed signal by using the FastICA,the method can restrain the zero-order terms effectively.The method can better retrieve the amplitude and phase of the original complex-wave through the experiment even when there is a frequency spectrum mixture in the holograms.

Key words: digital holography, complex-wave retrieval, Fast Independent Component Analysis（FastICA）, zero-order terms and twin-image