Polarization discrimination of coherently propagating light in turbid media

Vanitha Sankaran, Klaus Schönenberger, Duncan J. Maitland, Joseph T. Walsh

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

We describe the use of degree of polarization to discriminate unscattered and weakly scattered light from multiply scattered light in an optically turbid material. We use spatially resolved measurements of the degree of polarization to compare how well linearly and circularly polarized light survives in a sample. Experiments were performed on common tissue phantoms consisting of polystyrene and Intralipid microsphere suspensions and on adipose and arterial tissue. The results indicate that polarization is maintained even after unpolarized irradiance through each sample has been extinguished by several orders of magnitude. The results also show that polarized light propagation in common tissue phantoms is distinctly different from polarized light propagation in the two tissues investigated. Further, these experiments illustrate when polarization is an effective discrimination criterion and when it is not. The potential of a polarization-based discrimination scheme to image through the biological and nonbiological samples investigated here is also discussed.

Original languageEnglish (US)
Pages (from-to)4252-4261
Number of pages10
JournalApplied optics
Volume38
Issue number19
DOIs
StatePublished - Jul 1 1999

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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