Optical coherence tomography of multilayer tissue based on the dynamical stochastic fringe processing

Erkki Alarousu; Igor P. Gurov; Jukka T. Hast; Risto A. Myllyla; Alexey Zakharov

doi:10.1117/12.518625

22 September 2003 Optical coherence tomography of multilayer tissue based on the dynamical stochastic fringe processing

Erkki Alarousu, Igor P. Gurov, Jukka T. Hast, Risto A. Myllyla, Alexey Zakharov

Proceedings Volume 5149, Laser Applications in Medicine, Biology, and Environmental Science; (2003) https://doi.org/10.1117/12.518625
Event: International Conference on Lasers, Applications, and Technologies 2002, 2002, Moscow, Russian Federation

Abstract

Interferometers with a low-coherent illumination allow non-contact measuring the rough surface relief or multilayer tissues by locating the visibility maxima of interference fringes. The problem is the light scattering by the surface to be evaluated; it is why the interference fringes are often distorted. Other problem consists in the need to process large amount of data obtained in optical coherence tomography (OCT) systems. We propose to use a stochastic fringe model and Kalman filtering method for noisy low-coherent fringe processing. A fringe signal value is predicted at the next discretization step using full information available before this step and the prediction error is used for dynamic correction of fringe envelope and phase. The advantages of Kalman filtering method consist in its noise-immunity, high-speed data processing and optimal evaluation of fringe parameters.

Citation Download Citation

Erkki Alarousu, Igor P. Gurov, Jukka T. Hast, Risto A. Myllyla, and Alexey Zakharov "Optical coherence tomography of multilayer tissue based on the dynamical stochastic fringe processing", Proc. SPIE 5149, Laser Applications in Medicine, Biology, and Environmental Science, (22 September 2003); https://doi.org/10.1117/12.518625

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