Use of retinal nerve fiber layer birefringence as an addition to absorption in retinal scanning for biometric purposes

Research output: Contribution to journalArticle

Abstract

We built a device sensitive to the birefringence of the retinal nerve fiber layer for biometric purposes. A circle of 20° diameter on the retina was scanned around the optic disk with a spot of light from a 785 nm laser diode. The nonbirefringent blood vessels indenting or displacing the retinal nerve fiber layer were seen as "blips" in the measured birefringence-derived signal. For comparison, the reflection-absorption signature of the blood vessel pattern in the scanned circle was also measured. The birefringence-derived signal proved to add useful information to the reflectance-absorption signature for retinal biometric scanning.

Original languageEnglish (US)
Pages (from-to)1048-1053
Number of pages6
JournalApplied Optics
Volume47
Issue number8
DOIs
StatePublished - Mar 10 2008

ASJC Scopus subject areas

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

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