Anisotropic light transmission properties of plain woven fabrics

Abstract

Light transmission property of plain woven fabrics was studied in order to perform the fabric design considering the transmission. A light transmission measurement apparatus which could change incidence and receiving direction of light was developed and the change of the transmission factor by light direction was measured for plain woven fabrics. Because structures of the fabrics are anisotropy, the light transmission property showed anisotropy. The anisotropy of transmission factor was remarkable in large incidence angle, and the minimum or maximum values were showed every π/4 cycle. An approximation curve of anisotropy was proposed and the anisotropic light transmission factor was estimated from a measurement at front of a fabric and structure of the fabric based on crimp theory of Peirce.