Stress profile determination in chemically strengthened glass using scattered light

A method is described for determining stress profiles in thin specimens of chemically strengthened glass by progressively etching away the surface compressive layer and measuring the change in magnitude of the centre tensile stress using the scattered light technique. The profile is derived from the relationship between thickness change and centre tension change. Some specimen results are presented for a commercial glass (Corning Code 0319) and other chemically strengthened glasses.