Effects of Fabric Parameters on Specular Reflection of Single-Jersey Knitted Fabrics

Abstract

This paper is concerned with the prediction of goniophotometric curves (distribution curves of specularly reflected light) based on our mathematical model developed earlier for single-jersey knitted fabrics made from monofilament yarns. The theory is extended to include fabrics from multifilament yarns. Four physical and optical parameters related to the fabric and the light source are investigated: fiber refractive index, yarn cross section, incident light angle, and fiber ellipticity. Their effects on the goniophotometric curves and luster index of knitted fabrics are determined. In addition, the great difference is high lighted between light reflected from knitted fabrics and light received by the goniopho tometer.

Optical fibers for smart photonic textiles

“…Prediction of textile appearance due to multi-fi ber redirection of light was addressed by Rubin et al (1997), Grasso et al (1997) and Schuster et al (2003). It was also established that the shape of the individual fi bers comprising a yarn bundle has a major effect on the appearance of the resultant textile (Maekawa et al , 1984;Rubin et al , 1994;Sirikasemlert and Tao, 1999;Yamaguchi and Takanabe, 2001;Zhang et al , 2003), including textile brightness, glitter, color, etc. The use of synthetic fi bers with non-circular cross-sections, or microstructured fi bers containing air voids metallic color of the chalcogenide glass.…”

Characterization of Fabrics using the Light Reflectanceand the Surface Geometry Measurements

“…Light reflectance measurements or color measurements have been used to simulate the appearance of fabric or as a means to correlate with the visual impression of fabric ; however the measurement geometries such as illumination and viewing which were used in the previous study were limited and also a fabric was not rotated in the measurements [6,7,8,9]. When a carbon fiber woven fabric was rotated in a surface, the rapid change of the L ＊ value was observed and this change was detected perceptually [10].…”

Color-changing and color-tunable photonic bandgap fiber textiles

“…Prediction of textile appearance due to multi-fiber redirection of light was addressed in [23,24,25]. It was also established that the shape of the individual fibers comprising a yarn bundle has a major effect on the appearance of the resultant textile [26,27,28,29,30], including textile brightness, glitter, color, etc. The use of the synthetic fibers with non-circular crossections, or microstructured fibers containing air voids [31] running along their length became one of the major product differentiators in the yarn manufacturing industry.…”