Real-time processing of off-axis interferograms-from the camera to the user

Pinhas Girshovitz, Tamir Gabay, Natan T. Shaked

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We review new algorithms that have been presented by us lately1 for fast reconstruction and phase unwrapping of sample wave-fronts recorded using off-axis digital holographic imaging. These algorithms enable reconstruction and phase unwrapping of sample wave-fronts up to 16 times faster than the conventional Fourier-based reconstruction algorithm. The algorithms exploit the compression properties of holographic imaging for decreasing the calculation complexity required for extracting the sample wave-front from the recorded interferogram. Using the presented algorithms, we were able to reconstruct, for the first time, 1 Mega pixels off-axis interferograms in more than 30 frames per second using a standard single-core personal computer on a Matlab-Labview interface, without using a graphic processing-unit programming or parallel computing. This computational speedup is important for real-time visualization, calculation and data extraction for dynamic samples and processes that are evaluated using off-axis digital holography such as biological cell imaging and real-time nondestructive testing.

Original languageAmerican English
Title of host publicationInterferometry XVII
Subtitle of host publicationTechniques and Analysis
EditorsKatherine Creath, Jan Burke, Joanna Schmit
PublisherSPIE
ISBN (Electronic)9781628412307
DOIs
StatePublished - 1 Jan 2014
EventInterferometry XVII: Techniques and Analysis - San Diego, United States
Duration: 17 Aug 201419 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9203

Conference

ConferenceInterferometry XVII: Techniques and Analysis
Country/TerritoryUnited States
CitySan Diego
Period17/08/1419/08/14

Keywords

  • Digital holography
  • Interferometry
  • Phase extraction
  • Phase reconstruction
  • Real time imaging

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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