论文标题
通过线性连接迭代优化的非接触计量学精确相成像
Non-interferometric accurate phase imaging via a linear-convergence iterative optimization
论文作者
论文摘要
本文报道了一种一般的非接入高智度定量相成像（QPI）方法，用于任意复杂的有价值对象。由典型的4F光学配置作为成像系统给出，在对象傅立叶频谱上应用了三个小窗口调制帧，以便在图像平面上产生重新分布强度模式，其中对象相位以不同程度出现。然后，建立将对象相位与输出强度联系起来的代数关系，以为我们提供近似的封闭形式相恢复。此外，制定了有效的迭代优化策略，以将近似解决方案转化为准确的解决方案。由于迭代的线性收敛属性，因此在不需要大量迭代的情况下实现了高精度的相位恢复。通过对不同相位对象的数值模拟和实验来验证所提出方法的可行性和准确性。
This paper reported a general noninterferometric high-accuracy quantitative phase imaging (QPI) method for arbitrary complex valued objects. Given by a typical 4f optical configuration as the imaging system, three frames of small-window phase modulation are applied on the object Fourier spectrum so that redistributed intensity patterns are produced on the image plane, in which the object phase emerges at different degree. Then, an algebraic relationship that connects the object phase with the output intensity is established to provide us with an approximate closed form phase recovery. Further, an efficient iterative optimization strategy is developed to turn that approximate solution into an accurate one. Due to the linear convergence property of the iteration, a high accuracy phase recovery is achieved without requiring heavy iterations. The feasibility and accuracy of the proposed method are verified by both numerical simulations and experiments on diverse phase objects.
