Determination of particle size by using the angular distribution of backscattered light as measured with low-coherence interferometry

Adam Wax*, Changhuei Yang, Vadim Backman, Maxim Kalashnikov, Ramachandra R. Dasari, Michael S. Feld

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

We employ a novel interferometer to measure the angular distribution of light backscattered by a turbid medium. Through comparison of the measured data with the predictions of Mie theory, we are able to determine the size of the scatterers comprising the medium with subwavelength precision. As the technique is based on low-coherence interferometry, we are able to examine the evolution of the angular distribution of scattered light as it propagates into the medium. The effects of multiple scattering as a function of penetration depth in the medium are analyzed. We also present various considerations for extending this technique to determining structural information in biological tissues, such as the effects of a distribution of particle sizes and the need to average out speckle contributions.

Original languageEnglish (US)
Pages (from-to)737-744
Number of pages8
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume19
Issue number4
DOIs
StatePublished - Apr 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition

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