AO-OCT with reference arm phase shifting for complex conjugate artifact-free imaging of in vivo retinal structures

Robert J. Zawadzki, Dae Yu Kim, Steven M. Jones, Suman Pilli, Scot S. Olivier, John S. Werner

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


We summarize the performance of an AO-OCT system with reference arm phase shifting for complex conjugate artifactfree imaging of in vivo retinal structures. As a complex conjugate artifact removal (CCR) method we used a previously reported technique requiring constant phase shifts between consecutive A-scans. In our system these shifts were generated by continuous beam path-length changes from offsetting the pivot point of the scanning mirror placed in the system reference arm. In order to reconstruct the complex spectral fringe pattern we used Fourier transformation along the transverse axis and a filtering algorithm. The suppression ratio of mirror complex artifact images was assessed based on acquired in vivo CCR AO-OCT images. Finally, potential problems and limitations connected with this acquisition scheme and data processing algorithms are discussed.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
StatePublished - 2011
EventOphthalmic Technologies XXI - San Francisco, CA, United States
Duration: Jan 22 2011Jan 24 2011


OtherOphthalmic Technologies XXI
Country/TerritoryUnited States
CitySan Francisco, CA


  • aberration compensation
  • adaptive optics
  • complex conjugate artifact
  • imaging systems
  • medical optics instrumentation
  • ophthalmology
  • optical coherence tomography

ASJC Scopus subject areas

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


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