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Interferometric determination of the optical properties of fibres with irregular transverse sections (Ramie)
Author(s) -
Hamza A. A.,
Sokkar T. Z. N.,
Shahin M. M.
Publication year - 1985
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1985.tb02564.x
Subject(s) - ramie , optics , materials science , birefringence , refractive index , interference microscopy , interferometry , optical path length , interference (communication) , transverse plane , optical fiber , beam (structure) , optical path , reflection (computer programming) , fiber , composite material , physics , channel (broadcasting) , electrical engineering , structural engineering , computer science , programming language , engineering
SUMMARY The thickness of fibres and their irregularity were determined from the forward scattering of a He‐Ne laser beam. Two methods have been used for the measurement of refractive indices and birefringence of Ramie fibres. The first of these methods is the application of multiple‐beam Fizeau fringes in transmission and at reflection. The second is the use of the double refracting interference microscope designed and developed by Pluta. In each method, refractive index values have been determined using two different analyses of the interference pattern. To overcome the difficulty of the irregular transverse section of Ramie fibres, the area enclosed under the fringe shift is considered as representing the path difference integrated across the fibre.