Fourier Ptychography Part II: Phase Retrieval and High-Resolution Image Formation. (September 2022)

• Record Type: Journal Article
• Authors: Loetgering, Lars; Aidukas, Tomas; Zhou, Kevin C.; Wechsler, Felix; Horstmeyer, Roarke
• Is Part Of: Microscopy today. Volume 30:Number 5(2022)
• Page Start: 36
• Page End: 39
• Publication Date: 2022-09
• Subjects: Fourier ptychography -- Fourier transform -- computational microscopy -- phase retrieval -- gigapixel microscopy; Microscope and microscopy -- Periodicals; 502.8
• DOI: 10.1017/S1551929522001055
• Languages: English
• ISSNs: 1551-9295

Abstract

Abstract : Abstract: This article is the second within a three-part series on Fourier ptychography, which is a computational microscopy technique for high-resolution, large field-of-view imaging. While the first article laid out the basics of Fourier ptychography, this second part sheds light on its algorithmic ingredients. We present a non-technical discussion of phase retrieval, which allows for the synthesis of high-resolution images from a sequence of low-resolution raw data. Fourier ptychographic phase retrieval can be carried out on standard, widefield microscopy platforms with the simple addition of a low-cost LED array, thus offering a convenient alternative to other phase-sensitive techniques that require more elaborate hardware such as differential interference contrast and digital holography.