Nonlinear dynamic filtering of logarithmically amplified fringe signals in optical coherence tomography applied to paper measurements

E. Alarousu*, V. Bilyk, I. Gurov, J. Hast, L. Krehut, R. Myllylä, A. Zakharov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Application of the nonlinear Kalman filtering method to logarithmically amplified low-coherence fringe signals measured from paper samples is considered. Experimental results of dynamic fringe envelope recovery in optical coherence tomography (OCT) systems are presented. The analog fringe envelope and digital dynamic fringe envelope recoveries from noisy signals are compared. The results show that the nonlinear discrete Kalman filtering method can be applied to estimate envelopes of logarithmically transformed low-coherence fringe signals with high noise immunity. Logarithmic amplification reduces quantization error in dealing with small signal values. The experimental results obtained demonstrate the possibility of purely digital signal processing in OCT.

Original languageEnglish (US)
Pages (from-to)27-32
Number of pages6
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Volume101
Issue number1
DOIs
StatePublished - Jul 2006
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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