Visual reflection

polariscope VRP

Used for:

Stress measurement within the black painted band, without the need for removing paint or making special parts.

Occasionally, a surface tension (tensile imbalance) develops near the glass edge, which can cause cracking during installation or failure due to minor scratches or impacts.

 

Application:

Measuring edge stress and near-edge tension in the frit area and in clear glass

 

Conforms to:

ASTM C1279

 

Principle of operation:

In tempered, heat-strengthened and laminated automotive glass a complex stress field develops near the glass edges.

 

Features:

The procedure is non-destructive and can be used on flat or curved glass.

The polarimeter provides a full-field view of the edge region, allowing the operator to recognize problem areas at a glance. A reflective target allows clear areas of the glass to be measured in addition to the painted areas.

 

The sensitivity and precision of the system is effectively twice that of transmissive systems.