Particle Size and Concentration in Opal Diffusing Glasses

JSGT 1933 V17 T411-T432

The average particle size and concentration in a number of opal glasses have boon determined experimentally by means of a high-power microscope. The way in which these quantities varied through the thickness of a glass has also been investigated. The diffusing properties of the glasses have been measured photometrically and the average size and concentration of the particles in the glasses deduced from the theoretical equations of Ryde and Cooper. A comparison has been made of the theoretical and experimental results, and it is shown that over the range of particle size considered, the theory is in good agreement with experiment.

C. Dunbar