In this paper, a new phase retrieval method using sequential phase modulations is proposed. Behind the unknown object, adding sequential phase modulations will change the diffraction intensities received by sensor. Through increasing the number of diffraction intensities patterns, the difficulty of retrieving the unknown object is decreased. To better select these modulation phases, the complexity parameter is defined to evaluate the complexity of unknown object. When the complexity parameter of unknown object is larger, it contains more spectrum information on different frequency bands and will be harder to retrieve. The complexity of unknown object should be contained between the maximum and minimum complexities of modulation phases. In this way, the information of each frequency band on the unknown object can be effectively retrieved. Meanwhile, the distribution of modulation phases should be continuous to avoid introducing high frequency noise. In addition, there is no limit on what kind of modulation phase distribution to choose. The effectiveness and fast convergence of this new method has been proved.

中文翻译：

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一种使用顺序相位调制的新相位检索方法

在本文中，提出了一种使用顺序相位调制的新相位检索方法。在未知物体后面，添加顺序相位调制将改变传感器接收到的衍射强度。通过增加衍射强度图案的数量，降低了检索未知物体的难度。为了更好地选择这些调制相位，定义了复杂度参数来评估未知对象的复杂度。当未知对象的复杂度参数越大时，它包含的不同频段的频谱信息越多，检索起来就越困难。未知对象的复杂度应包含在调制相位的最大和最小复杂度之间。这样就可以有效地检索到未知物体上各个频段的信息。同时，调制相位的分布应该是连续的，以避免引入高频噪声。此外，选择什么样的调制相位分布也没有限制。已经证明了这种新方法的有效性和快速收敛性。