Investigation of swelling behaviour in strongly scattering porous media using optical coherence tomography

Abstract

This paper presents an optical method to measure independently the effect of swelling on the optical properties of strongly scattering porous media. The method was tested by measuring the swelling behaviour of cellulose fibre tissue using optical coherence tomography. The experimental results proved that the effect of swelling on optical and physical properties of paper can be measured.

Fading and showing mechanisms of ancient color relics based on light scattering induced by particles

“…Here, the light scattering of S-RNP is mainly caused by the air voids between TiO 2 particles. Aer loading TiO 2 particles on the paper, the difference in refractive index was not only that between cellulose (1.55) and air (1.00) but also partially between TiO 2 (2.73) and air (1.00), 19,20 leading to an increase in the difference in the refractive index. Consequently, the scattering of S-RNP evidently increased in comparison with that of RNP.…”

“…Scattering can reduce light transmission in the pigment layer, which results in color fading since the light absorption of pigments is decreased. 19,20,27 In order to verify the above statement, the experiments described in Fig. 9 were performed.…”

Yield and Electrical Functionality of the Glass-Laminated Conductive Wires and Connectors

“…Non-destructive structural characterization method, so called optical coherence tomography (OCT) was used in this study to evaluate structural changes caused by lamination and find reasons for the observed features of laminated electronics. OCT is widely used in (bio)medical measurements [18][19] but the same technology has been utilized also in industrial applications [17,[20][21][22][23][24][25][26][27] including the electronics quality inspection and reliability analysis [17,22]. Briefly described, OCT is a light-based imaging method in which backscattered intensity profiles are recorded and typically, by lateral scanning of a probing beam cross-sectional images are composed.…”

Optical Coherence Tomography – Applications in Non- Destructive Testing and Evaluation

“…Especially the group around Myllylä in Oulu, Finland, is heavily engaged in the application of OCT for NDT. Over the last years they have applied OCT for the characterization of paper [56][57][58][59], printed electronics circuits [19,60] and also used OCT as a method for the characterization of wettability [61].…”