Halo-free quantitative phase imaging with partially coherent light

Tan H. Nguyen, Hassaan Majeed, Christopher A. Edwards, Minh N. Do, Lynford L. Goddard, Gabriel Popescu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We provide a quantitative model for image formation in common-path QPI systems under partially coherent illumination. Our model is capable of explaining the phase reduction phenomenon and halo effect in phase measurements. We further show how to fix these phenomena with a novel iterative post-processing algorithm. Halo-free and correct phase images of nanopillars and live cells are used to demonstrate the validity of our method.

Original languageEnglish (US)
Title of host publicationQuantitative Phase Imaging
EditorsYongKeun Park, Gabriel Popescu
ISBN (Electronic)9781628414264
StatePublished - 2015
Event1st Conference on Quantitative Phase Imaging, QPI 2015 - San Francisco, United States
Duration: Feb 7 2015Feb 10 2015

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


Other1st Conference on Quantitative Phase Imaging, QPI 2015
Country/TerritoryUnited States
CitySan Francisco


  • Phase Imaging
  • computational imaging
  • halo removal
  • holography
  • image processing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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