Adaptive filter algorithms for interference patterns of diffusion measurements

Erik Marquardt; Norbert Grosser; Joachim Richter

doi:10.1117/1.601514

1 October 1997 Adaptive filter algorithms for interference patterns of diffusion measurements

Erik Marquardt, Norbert Grosser, Joachim Richter

Optical Engineering, Vol. 36, Issue 10, (October 1997). https://doi.org/10.1117/1.601514

A holographic interferometer is used to measure diffusion coefficients of binary molten salt mixtures. The composition of such transparent mixtures is proportional to the refractive index. The composition changes cause local variations of the refractive index during diffusion. These variations are visualized by interference fringes, which are photographed by a CCD camera. Exact detection of the intensity extreme values of the fringes is essential to calculate diffusion coefficients. As irregular illumination and noise disturb the detection, adaptive filter algorithms are applied to reduce noise sufficiently while maintaining all relevant information.

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Erik Marquardt, Norbert Grosser, and Joachim Richter "Adaptive filter algorithms for interference patterns of diffusion measurements," Optical Engineering 36(10), (1 October 1997). https://doi.org/10.1117/1.601514

Published: 1 October 1997

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