Characterization of Individual Cotton Fibers via Light-Scattering Experiments

Abstract

A detailed experimental/theoretical study is conducted to explore the fundamental nature of individual cotton bers via light-scattering experiments. For this purpose, a new precision nephelometer is built and calibrated with quartz bers. In the experiments, iris opening (viewing angle) and scanning range and rate were determined to be the key parameters for precision measurements. The experimental results are compared against the theoretical predictions based on a nite element model. It is shown that the scattered intensity pro les as a function of scattering angle (µ) can be related to the quality ( neness) of cotton. At small scattering angles of µ < 10 deg, these pro les can be used to infer the shape (cross section) of cotton bers. On the other hand, within the range of 30 deg < µ < 50 deg they may be used to evaluate single-ber cotton quality ( neness). NomenclatureA == ; A ? = amplitudes of the electric eld vector b = thickness of cotton ber, ¹m d i = incident light beam diameter, mm d s = iris opening front of the photomultiplier tube, mm E == ; E ? = components of the electric eld vector I = Stokes vector I; Q; U; V = components of Stokes vector I s .r/ = scattered light intensity at observing point, r in a far eld k = the complex wave number l 1 , l 2 , l 3 = characteristic dimensions of ber, ¹m m = complex refractive index ® = orientation angle of cotton cross section, deg ± = phase shift " == ; " ? = phases of the electric eld vector µ = scattering angle, deģ = wavelength, ¹m

Detection of Cotton Lint Trash within the Ultraviolet—Visible Spectral Range

“…12 Aslan et al obtained the scattering rule for single cotton fibers using the finite element method (FEM). 13 Furthermore, the scattering theory of an infinitely long cylinder has been widely researched. 14 It can be concluded that scattered light is confined in a cone, which is oriented around the cylinder axis.…”

Polarized light‐based scheme to correlate Mueller matrix elements and casein foam properties

“…Polarized light scattering‐based techniques (PLST) have been successfully used to characterize a number of systems such as colloidal particle suspensions, milk, cotton fibres, living epithelial cells, and nanoscale air bubbles based on their multiple scattering behaviours. However, only primary studies on applying polarized light scattering techniques on foams have been reported in the literature.…”

Propagation of polarized light through textile material

“…Light scattering and propagation in textile material, e.g., transflectance, single scattering, and backscattering, have been employed experimentally on mass measurement [1], quality examination [2,3], area density determination [4], and structural analysis [5]. In the abovementioned applications, light scattering and propagation in textile material are favorable; they are unfavorable to our study on the detection of impurities hidden in textile material (such as cotton fiber assemblies) with polarized incident light.…”