Polariscope viewing stress in Transparent Glass and Plastic

The Polariscope ( Ref.PSV-202) has been designed to observe and analyze the internal stress of transparent glass and plastic products .
Valued customers : Lock & Lock , Heraeus , Ferrotec
Components : LED light , an Analyser , a Polarizer

Detecting object
1. Transparent glass products with complex construction.
such as : penicillin bottle, ampoule , mobile phone cover, lighting tube, solar glass ,automobile glass,sapphire, glass container , glass handicraft
2. Transparent plastic samples
plastic bottle , cosmetic bottle , beverage bottle, plastic tray, plastic film

Specifications
Optical path difference of full-wave plate : 560nm
Viewing field: 200mm*200mm
Measuring height :236mm
Overall size:300mm*280mm*330mm
Voltage: 220V
Light source: White fluorescent lamp
Weight:8KG

Measuring Principle
The internal stress of glass and plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn.
Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress.
From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process.