Fatima Areeba, Faccio Daniele
Opt Express. 2024 Apr 22;32(9):16016-16026. doi: 10.1364/OE.520066.
Retrieving the phase of an optical field using intensity measurements is one of the most widespread and studied inverse problems in classical optics. However, common iterative approaches such as the Gerchberg-Saxton algorithm and its derivatives suffer from the twin-image problem - the iterative minimisation stagnates and the recovered field contains features from both the target field and its point-reflection. We present a technique that leverages mathematical properties of the stagnated field, to constrain the problem and remove the twin image artefacts. This improvement in reconstruction robustness has implications in a range of fields, including applications in adaptive optics, holography and optical communications.
利用强度测量来恢复光场的相位是经典光学中最普遍且研究最多的逆问题之一。然而，诸如格尔奇贝格 - 萨克斯顿算法及其衍生算法等常见的迭代方法存在双像问题——迭代最小化过程会停滞，并且恢复的光场包含目标光场及其点反射的特征。我们提出了一种利用停滞光场的数学特性来约束问题并消除双像伪影的技术。这种重建鲁棒性的提升在一系列领域都有影响，包括自适应光学、全息术和光通信等应用领域。
