Optical Studies of Saudi Cotton Fibre Structure Using Scanning Electron Microscopy PDF

Keywords

refractive index, optical studies, cotton fibre

Abstract

Application of Becke-line, double-beam and multiple-beam interferometric methods were used to measure the refractive indices and birefringence of Saudi (Gizan) cotton fibres. The scanning electron microscopy was used to estimate the cross sectional parameters and to show deformations and fine fibrillar structures which cannot be resolved with optical microscopes on the fibre surface. The resulting data were utilized to calculate the polarizability per unit volume, Cauchy's dispersion constants, dispersive power, isotropic refractive index, the spiral angle, the optical orientation angle and specific volume of the fibre materials. The results were found in good agreement with the previously published values of different varieties of cotton fibres. Micro-interferograms are given for illustrations