Optical clearing of paper studied by optical coherence tomography: Monte Carlo simulation

Mikhail Kirillin; Alexander V. Priezzhev; Jukka Hast; Risto Myllylä

doi:10.1117/12.675003

9 June 2006 Optical clearing of paper studied by optical coherence tomography: Monte Carlo simulation

Mikhail Kirillin, Alexander V. Priezzhev, Jukka Hast, Risto Myllylä

Proceedings Volume 6162, International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies; 61620L (2006) https://doi.org/10.1117/12.675003
Event: International Conference on Lasers, Applications, and Technologies 2005, 2005, St. Petersburg, Russian Federation

Abstract

The problem of fast investigation of the structural properties of paper samples is of great interest nowadays. The existing methods for structural imaging of paper require long time for obtaining the final result or need changing the structure of the studied sample. One of modem high-promising non-invasive techniques for faster examination of paper structure is optical coherence tomography (OCT), based on the principles of low-coherence interferometry of light backscattered from the investigated object. In present paper we simulate OCT signals from different paper samples with planar and non-planar geometry of air-fiber boundaries implementing Monte Carlo method. OCT provides quality images of in-depth scanning for optically transparent low-scattering objects, however for high-scattering media the maximal scanning depth is quite small. In order to increase the scanning depth for such media different clearing agents are used. We consider ethanol, 1-pentanol, glycerol and benzyl alcohol as such agents applied to a paper sample. Obtained results show, that all agents under consideration provide better visualization of rear border of the studied sample, which is very important for precise paper thickness measurement. However, the agents, showing the best results for rear border visualization provide worse visualization of the inner structure of the sample.

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Mikhail Kirillin, Alexander V. Priezzhev, Jukka Hast, and Risto Myllylä "Optical clearing of paper studied by optical coherence tomography: Monte Carlo simulation", Proc. SPIE 6162, International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies, 61620L (9 June 2006); https://doi.org/10.1117/12.675003

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KEYWORDS

Optical coherence tomography

Particles

Optical fibers

Scattering

Interfaces

Refractive index

Monte Carlo methods

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