Polariscopes LP21POL and LP50POL

polariscope How a Polariscope Works for Glass Stress Analysis
A polariscope relies on the optical phenomenon of photoelasticity to detect and visualize internal stresses in transparent materials like glass. The device fundamentally consists of a light source and two polarizing filters: a polarizer and an analyzer. These filters are typically crossed at a 90-degree angle, meaning no light can pass through them initially. Read more

Compact LP21POL

  • Designed for testing stress in glass
  • AC and battery powered
Large observation window
Possibility of tilting 25 degrees.
The viewing window can be tilted
Easy to store after folding

LP21POL
Light source LED
Polarized light color White
Control Push button
Voltage 100 - 240 V AC (24 V DC)
Working temperature -10 °C - +40 °C
Base dimensions (w x d) 800 x 800** mm
Height when folded/rod demounted 80 mm
Max. height About 500 mm
Illuminated area (w x h) 350 x 350 mm
Observation screen window dimensions (w x h) About 155 x 155 mm
Battery powered Yes
Cat. PO50WBATT

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Prefabricated parts for bottles

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Large LP50POL

A large polariscope allows for stress testing of larger glass or components. The light source is attached to a camera stand, allowing for positioning in hard-to-reach places. Stress in the glass can be observed directly, or a photo or video can be taken for later analysis, even off-site.
  • Designed for testing stress in glass
  • AC and battery powered
  • Includes filter with phone clip for most phones and tablets

Light source LED
Polarized light color White
Color temperature 4000 K
Light power 36 W
Luminous flux About 3600 lm
Working temperature -10 °C - +40 °C
Voltage 100 - 240 V AC (30 V DC)
Dimensions (h x w x d) 400 x 400 x 80 * mm
Illuminated area (w x h) 350 x 350 mm
Observation screen dimensions (w x h) 165 x 86 mm
Observation screen window dimensions (w x h) 152 x 73 mm
Cat. PO50WBAT
*without bracket and tripod

polariscope When a piece of stressed glass is placed between these two filters, the internal tension alters the glass's optical properties, causing it to become birefringent (double-refracting). This birefringence shifts the polarization state of the light as it passes through the glass, allowing some of the light to successfully pass through the second filter (the analyzer). As a result, the previously invisible internal stresses are revealed as distinct, glowing interference patterns or colored bands, which directly indicate the location and magnitude of the tension. Go back

Example of polariscope use