LIGHT DIFFUSING POWER OF TRANSLUCENT GLAZING

摘要

It may be observed that materials that have very strong diffusing ability transmit light quite evenly in all directions; theoretically they are Lambertian's diffusers. On the other hand, materials that have weak diffusing ability transmit most light in the directions close to the direction of light incident at the material. The paper describes and discusses the diffusing ability of glazing materials. The new evaluation method and a new rating system of this ability, namely Light Diffusing Power is proposed. According to this, the Diffusing Power depends on the ratio of light flux transmitted by the sample in the light direction and directions close to it (up to 5°, 10° or 20° dispersion angle) to the total light flux transmitted by the sample as measured in the method. The following categories of diffusing power are proposed: Very strong, Strong, Moderate, Weak and Very weak.