Multi-mode opto-thermo-mechanical stretching system for determination of 3D refractive index along the axis of stretched and/or heated fibres |
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Authors: | TZN Sokkar MA El-Morsy MI Raslan |
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Institution: | a Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt b Physics Department, Demietta Faculty of Science, Mansoura University, New Demietta, Egypt |
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Abstract: | A multi-mode opto-thermo-mechanical stretching system was modified to study the changes in the 3D of optical and structural properties of stretched fibre along its axis. The structural deformation of isotactic Polypropylene, (iPP), fibres was studied at different draw ratios. The modified system coupled with Pluta polarising interference microscope was used to determine the variation of the birefringence in three dimensions during stretching process. Using this modified system, the multi-necking was detected. Subfringe analysis technique was used to determine the phase distribution of the obtained microinterferograms, which were given for illustration. |
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Keywords: | Isotactic polypropylene (iPP) Pluta polarising interference microscope and subfringe Analysis technique |
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