GONIOPHOTOMETRIC CURVES OF WOVEN FABRICS.

The term ″gloss″ is defined by dividing the reflected light distribution curve into two components; a specular and a diffuse reflection component. The ratio between two components is proposed. Experimental data are presented which show that the shapes of diffusely reflected light distribution curves could be estimated by removing the specular component from reflected light distribution curves. The surface smoothness had a great effect on the shape of the diffusely reflected light distribution curves, resulting in increasing the deviation from the Lambert Law. Assuming the most simplified elliptical model, a diffusely reflected light distribution curve was examined, and it was confirmed that the smoothness of the model had a great effect on the deviation of reflected light distribution curve from the Lambert Law. 4 refs.