Inverse scattering for reflection intensity phase microscopy

Alex Matlock, Anne Sentenac, Patrick C. Chaumet, Ji Yi, Lei Tian

Research output: Contribution to journalArticlepeer-review

Abstract

Reflection phase imaging provides label-free, high-resolution characterization of biological samples, typically using interferometric-based techniques. Here, we investigate reflection phase microscopy from intensity-only measurements under diverse illumination. We evaluate the forward and inverse scattering model based on the first Born approximation for imaging scattering objects above a glass slide. Under this design, the measured field combines linear forward-scattering and height-dependent nonlinear back-scattering from the object that complicates object phase recovery. Using only the forward-scattering, we derive a linear inverse scattering model and evaluate this model’s validity range in simulation and experiment using a standard reflection microscope modified with a programmable light source. Our method provides enhanced contrast of thin, weakly scattering samples that complement transmission techniques. This model provides a promising development for creating simplified intensity-based reflection quantitative phase imaging systems easily adoptable for biological research.

Original languageEnglish (US)
Pages (from-to)911-926
Number of pages16
JournalBiomedical Optics Express
Volume11
Issue number2
DOIs
StatePublished - Feb 1 2020
Externally publishedYes

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics

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