Measure Defects of Tempered Glass Using Polariscope

Measure Defects of Tempered Glass Using Polariscope

Tempered glasses are preferred more than glass materials because of their safe nature and quality. Whether use it for laptop screen and smartphones, the heavy-duty screen protectors keep the screen scratch-free. Tempered glasses are also used in ovens, stoves and many other kitchen appliances that are prone to severe heat conditions. They are vehicle safer as widely used for saving glass windows, shower doors, bathtub enclosures, sliding doors, skylights, hockey rinks, room dividers in office building and so forth.

In this process, the outer surface of the glass is in a state of compression and the interior in a state of tension. Due to this stress applied on the surface, tempered glass breaks into granular pieces with sharp edges. Due to its safety and strength, tempered glass is used in many industry verticals and applications. Therefore, it is important to check the quality of tempered glass using various devices. Many instruments can be seen in the market that is used to detect these glasses and test whether they are tempered properly or not. The Polariscope Strain Viewer for Glass and Plastics helps in detecting that the glass has been through tempering furnace and non-uniform heat treatment. These devices may be capable to detect the level of tempering as the surface compression cannot be seen by determining glass thickness.

Some of the basic features of Polariscope are:

• Standard template with 45° and 90° angle viewing for sample
• Crystal clear optical viewing experience
• Easy management for the data
• Pick and place to test the compare test perform image with standard image

Manufacturers use the quantitative measurement of residual surface compression. It is the most reliable and non-destructive indicator of mechanical strength and break pattern in heat-treated glass. Using Polariscope for glass, stress can be seen due to optical properties in glass, plastics, and other translucent materials. It causes the incident light to show two indices of refraction offset at right angle by moving different speeds with a phase shift proportional to stress.

The edges of the tempered glass have compressive stress, it is important to get an approximation of temper value by monitoring and counting colour bands that present the fringe orders in polarised light under magnification.

Pacorr presents Polariscope Strain Viewer used in various applications in the optical strain viewing field for glass and plastic industries. The device uses polarised light to disclose stress patterns in transparent and translucent objects. Polariscopes can be used for visual inspection to detect problems like blocked nozzles or temperature control issues.