Abstract
Measurements have been made of the color and luminance distribution (to plot the distribution curves) of the Tamamushi fabric (iridescent fabric) being illuminated by the hemisphere-shaped diffuse illuminator (light source), and then the optical properties of the Tamamushi fabric have been discussed.
1) When the Tamamushi fabric is illuminated by means of the hemisphere-shaped diffuse illuminator (light source), the iridescent effect in the fabric decreases.
2) When the Tamamushi fabric is illuminated by means of the hemisphere-shaped diffuse illuminator (light source), the color measured values of the fabric shows a color mixture between the warp ends and filling yarns.
3) The luminance distribution curves of the Tamamushi fabric are varied at the large incidence angle. It is presumably because of the effect of the shades due to the uneveness of the fabric.
4) When measurements have been made of the Tamamushi fabric being illuminated by the hemisphereshaped diffuse illuminator, there is less differences in the measured values than those measured with the parallel luminous flux.
5) If the hemisphere-shaped light source is larger than parallel luminous flux, the influence of the narallel luminous flux does not appear at the color measured.
