A fast, non-iterative ray-intersection approach for three-dimensional microscale particle tracking

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a non-iterative ray tracing method with robust post-capture microlens array sensor alignment to reconstruct sparse particle concentration in light field particle image velocimetry and particle tracking velocimetry nearly instantaneously. Voxels traversed by various rays are stored by a kd-tree to reduce memory load and computational time. A cloud point classification algorithm is employed for particle identification and spatial reconstruction. The approach is tested with a physically-based realistic model of a light field camera. Also, an optical system is assembled in a microscope to directly obtain the 3D laminar velocity field in the fully-developed region, which exhibits good agreement with the theoretical solution. This journal is

Original languageEnglish (US)
Pages (from-to)964-971
Number of pages8
JournalLab on a chip
Volume22
Issue number5
DOIs
StatePublished - Mar 7 2022

ASJC Scopus subject areas

  • Bioengineering
  • Biochemistry
  • Chemistry(all)
  • Biomedical Engineering

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