The VP4 LED is a wall-mounted polariscope designed for inspecting larger samples, with a wide viewing area of 104 x 53 cm.
It features a LED light source that backlights a polarizing filter, making internal stress clearly visible.
The sample is placed in front of the panel, and the operator performs the inspection using the supplied polarized glasses, which reveal any residual stress within the material.
With its wide inspection area, the VP4 LED is ideal for oversized or non-standard components in quality control and production environments.
Polariscopes – Internal Stress Analysis in Plastic and Glass
Used in labs and production, polariscopes are tools for spotting stress hidden inside transparent parts.
The process works by passing light from a controlled source through a polarizing filter, which then illuminates the sample. If the material is under internal stress—due to processing, uneven cooling, or mechanical pressure—interference patterns appear when viewed through a second polarizing filter. These stresses show up as colorful fringes or shifts in brightness.
Typical applications include:
- Inspection of optical plastic components (lenses, screens, filters): useful for detecting residual stress in mounted lenses, helping to avoid optical distortion in sunglasses and preventing microfractures in polycarbonate lenses.
- Verification of PET bottles and other transparent containers.
- Quality control in plastic injection molding processes.
- Inspection of thermally tempered glass.
For manufacturers, polariscopes are key to spotting hidden stress that could affect strength or optical clarity.
TECHNICAL DATA
- Power supply: 24 VDC
- Electric Power: 45 W
- Light source: LED 5000k CRI>80
- Dimensions: 104x53x2 cm
- Weight: 10 Kg
