title: Optical ptychography: a practical implementation with useful resolution.
abstract: Quantitative phase microscopy offers a range of benefits over conventional phase-contrast techniques. For example, changes in refractive index and specimen thickness can be extrapolated and images can be refocused subsequent to their recording. In this Letter, we detail a lensless, quantitative phase microscope with a wide field of view and a useful resolution. The microscope uses the recently reported coherent diffractive imaging technique of ptychography to generate images from recorded diffraction patterns.
authors.affiliation: Department of Electrical & Electronic Engineering, University of Sheffield, Sheffield S1 3JD, UK. a.maiden@sheffield.ac.uk
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Maiden
authors.forename: John M
authors.initials: JM
authors.lastname: Rodenburg
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Humphry
mesh_terms: D000465:Algorithms; D045744:Cell Line, Tumor; D004867:Equipment Design; D006696:Holography; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007909:Lenses; D008857:Microscopy, Interference / Q000379:methods*; D008858:Microscopy, Phase-Contrast / Q000379:methods*; D055095:Optics and Photonics; D012031:Refractometry; D015203:Reproducibility of Results; D012666:Semiconductors