Abstract
Multiple-beam Fizeau fringes are used to study the changes in optical properties of Nylon-6 γ-irradiated fibres. Changes in fibre structures due to drawing have been studied using two-beam interference. Some structural parameters such as optical orientation function and electric polarizability difference ( Δα 3α 0 ) were determined. Δα 3α 0 is found to be constant and depends only on the fibre structure. The generalized Lorantz-Loranz equation given by de Vries is used to determine Nylon-6 fibre structural parameters. Comparison between the results and when using Lorantz-Loranz equation are given. Refractive index profiles also can help in fibre investigations.
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