OpticStress® is an online measurement system for anisotropy of tempered glass, including retardation and iridescence (also known as stress pattern). The system adopts a non-contact polarization optical measurement method to obtain the retardation and relative intensity of iridescence, and provides glass quality classes based on the retardation distribution. The assessment parameters include: retardation and iridescence pseudo-color maps and their statistical data; cumulative distribution curves of retardation and iridescence; 2D data distribution curves; glass quality classes based on retardation; and simulation images of iridescence from different observation angles.

This instrument is suitable for measuring architectural glass.