Abstract
An argon ion lasar which emitted 200mW of linearly polarized green beam was applied for scattered light photoelasticity of a tempered glass article. Scattered light from a nonalkali alumino silicate glass was observable by naked eye or by magnifying glass. Qualitative estimations of the depth of compression layer and stress therein seemed possible by changing polarization characteristics of incident light by quartz wedg. Effect of refraction on both incident and scattered light was avoided by applying a tiny roof-shaped glass prism. This enabled the observation and measurement without immering glass articles in refractive index liguids.
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