Determination of spectral dispersion curves of polypropylene fibres

被引：22
|
作者：
Hamza, AA [1 ]
Fouda, IM [1 ]
Sokkar, TZN [1 ]
El-Bakary, MA [1 ]
机构：
[1] Mansoura Univ, Fac Sci, Dept Phys, Mansoura 35516, Egypt
来源：
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 1999年 / 1卷 / 03期
关键词：
polypropylene fibres; fibre refractive index; VAWI technique; spectral dispersion curves; microinterferometry; optical diffraction method;
D O I：
10.1088/1464-4258/1/3/005
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new mathematical formula is derived to determine the spectral dispersion curve of a fibre having a circular cross sectional shape. This formula depends on the principle of a variable wavelength interferometric technique taking into consideration the area under the fringe shift instead of the fringe shift itself. This method overcomes the difficulty of the presence of any irregularity of the transverse circular cross sectional shape of the fibre. Analysis of the new mathematical formula is given and applied experimentally for polypropylene fibres with draw ratio 3.5 and 4.0. Optical microscopy and optical diffraction methods are used to determine the cross sectional area of the fibres. Also, conventional VAWI and two-beam methods are applied for these fibres to confirm the results of the new analysis. Microinterferograms are given for illustration.
引用
收藏
页码：359 / 366
页数：8
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