Automatic fringe analysis of two-beam interference patterns for measurement of refractive index and birefringence profiles of fibres

T. Z.N. Sokkar, H. M. El Dessouky, M. A. Shams-Eldin, M. A. El-Morsy

Research output: Contribution to journalArticle

27 Citations (Scopus)


Automatic fringe pattern analysis is a powerful and inexpensive digital image-processing technique. Two-beam polarizing interference Pluta microscope [Pluta M. Opt Acta 1971;18:661, Pluta M. J Microsc 1972;96:309] is automated by the computer-aid via CCD camera and digital frame grabber. Software program is prepared to deal with the duplicated (separated and overlapped) Microinterferograms produced by two-beam polarizing microscope. It also gives an accurate and fast automatic measurement of refractive index and birefringence profiles for fibres. In this paper, the refractive index and birefringence profiles of two different types of fibres, basalt and polypropylene (PP) fibres are presented. A new method to determine the birefringence profile of fibres from non-duplicated microinterferogram is suggested. The cold drawing process for PP fibres is studied.
Original languageEnglish
Pages (from-to)431-441
Number of pages11
JournalOptics and Lasers in Engineering
Issue number3
Early online date3 Nov 2006
Publication statusPublished - Mar 2007
Externally publishedYes


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