Quasi-simultaneous en-face imaging using low coherence interferometry

Adrian Gh Podoleanu, Radu G. Cucu, George M. Dobre, David A. Jackson, R. B. Rosen

Research output: Contribution to journalConference articlepeer-review


We report a novel imaging procedure and a system implementing it, capable of acquiring two quasi-simultaneous en-face images from a multi-layer target using a single mode fiber optic interferometer. Two optical sources are employed, which are toggled on and off simultaneously with the ramp signal applied to the scanner whose movement determines the line in the raster image. In this way, half of the line in the final frame is generated by a particular source only. Imaging with two different depth resolutions or with two different wavelengths is made possible in this way. Because the switching is much faster than the observer eye can follow, the two images can be interpreted and compared simultaneously. The paper discusses the different functionality of the system depending whether the OCT image is made out of A or T-scans.

Original languageEnglish
Article number13
Pages (from-to)89-98
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2004
Externally publishedYes
EventFiber Optic Sensor Technology and Applications III - Philadelphia, PA, United States
Duration: 26 Oct 200428 Oct 2004


  • En face scanning
  • In-vivo imaging
  • Low coherence interferometry
  • Multiplexing


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