Phase retrieval based on coded splitting modulation

Summary A new coded splitting imaging technique is proposed to reconstruct the complex amplitude of a light field iteratively using a single‐shot measurement. In this technique, a specially designed coded splitting plate is adopted to diffract the illuminating beam into multiple beams of different orders and code their wavefronts independently and differently. From the diffraction pattern array recorded on the detector plane, both the modulus and phase distributions of the illuminating beam can be reconstructed iteratively using known transmission functions of different orders of the coded splitting plate. The feasibility of the proposed technique is verified both numerically and experimentally. Lay Description Coherent diffraction imaging (CDI) is a promising technology for obtaining the complex transmission function of a specimen from the recorded diffraction intensity. As a lens‐free technique, CDI can bypass the resolution limits imposed by the poor quality optics available at short wavelengths and can theoretically reach the diffraction‐limited resolution. This makes it a significant tool in several fields especially in material and biomedical sciences. In this paper, a single‐shot CDI method termed as coded splitting imaging technique is proposed. The light field exiting from the specimen is diffracted into several orders by a specially designed coded splitting plate (CSP) and forms a diffraction patterns array on the detecting plane. With the known transmissio...
Source: Journal of Microscopy - Category: Laboratory Medicine Authors: Tags: Original Article Source Type: research