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Refractive index profile of polyethylene fiber using interactive multiple‐beam fizeau fringe analysis
Author(s) -
Hamza A. A.,
Sokkar T. Z. N.,
Mabrouk M. A.,
ElMorsy M. A.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000929)77:14<3099::aid-app110>3.0.co;2-k
Subject(s) - refractive index , optics , materials science , refractive index profile , graded index fiber , birefringence , fiber , beam (structure) , step index profile , normalized frequency (unit) , refraction , optical fiber , perpendicular , refractometry , composite material , fiber optic sensor , physics , mathematics , geometry , phase locked loop , frequency synthesizer , phase noise
A multiple‐beam interference Fizeau fringes technique is used to measure the refractive index profile of drawn polyethylene fiber. The interference fringe shift in the fiber region has been analyzed automatically using an interactive algorithm. The method takes into consideration the refraction of the light beam when crossing the fiber. Plane polarized light vibrating parallel and perpendicular to the fiber axis are used to obtain the refractive index profiles of both cases. These profiles are used to determine some optical parameters such as the birefringence, the optical orientation function, the polarizability per unit volume, and the value Δα/3α o , which related to the material structure. The reliability of the method is tested considering the results of drawn polyethylene fiber samples using the manual technique. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 3099–3106, 2000