How Polariscope Strain Viewer Supports Quality Testing of Glass and PET Products
Quality inspection of glass and transparent plastic products involves more than checking their dimensions and surface appearance. A bottle, jar, PET preform, or molded component can look perfectly acceptable while still containing residual strain within the material. Such strain may develop because of variations in heating, forming, molding, annealing, or cooling. A Polariscope Strain Viewer provides a practical method for observing these hidden strain patterns. By using polarized light, the instrument helps quality-control teams examine the internal condition of suitable transparent materials without depending solely on ordinary visual inspection. What Does a Polariscope Strain Viewer Measure? A Polariscope is primarily used to reveal strain patterns caused by internal stress in transparent or translucent materials. When polarized light passes through a stressed specimen, the optical behaviour of the material changes. These changes become visible through the viewing system as di...