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Polariscope Strain Viewer for Glass & Plastic

PSPL - G20

Presto’s Polariscope Strain Viewer for Glass and Plastic is used to determine the residual stresses and strain that has an effect on the strength of the product. The device is helpful to determine the actual strength of the glass and plastic that contributes to producing the high-quality products for the end users.

At the time of manufacturing, residual stresses and strains appear that has a significant effect on the strength of the product. The damaging effect may contribute the failure of the product or could be beneficial at the same time. For example, the compressive stresses in the surface layers of toughened glass increases the strength in service.

In the photoelastic technique, polarized light is passed through the products made of transparent glass or plastics to interpret quality and quantity in an optical interference pattern.  The residual stress is measured in glass products and strains are measured in plastics moldings, castings or extrusions.



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    • Viewing Area: 260 * 240 mm
    • Display:            LED (Digital)
    • Power: 220V, Single phase, 50 Hz
    • Lights : CFL Light, Sodium Light
    • Standard Template Measuring Angle: 45º and 90º

    • The device is simple to operate and easy to understand
    • The strain and stress are effectively measured for glass and plastics
    • The equipment is provided with the calibration certificate traceable to NABL labs
    • The machine has high-quality optics that provides a clear and sharp view.
      • Two light intensity offered: Monochromatic light and Sodium Lamp.
      • Sharper and clearer optical viewing experience.
      • Standard Template for viewing a sample at a 45º and 90º angle.
      • Large Viewing glass area.










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