Non-interferometric accurate phase imaging via linear-convergence iterative optimization

This paper reported a general noninterferometric high-accuracy quantitative phase imaging (QPI) method for arbitrary complex valued objects. Given by typical 4f optical configuration as the system, three frames of small-window modulation are applied on object Fourier spectrum so that redistributed intensity patterns produced image plane, in which emerges at different degree. Then, an algebraic relationship connects with output is established to provide us approximate closed form recovery. Further, efficient iterative optimization strategy developed turn solution into accurate one. Due linear convergence property iteration, high accuracy recovery achieved without requiring heavy iterations. The feasibility and proposed verified both numerical simulations experiments diverse