In today’s competitive manufacturing environment, maintaining product quality is more important than ever. Industries dealing with glass and plastic materials must ensure that their products are free from internal stresses that can lead to cracks, deformation, or failure during use. This is where a Polariscope becomes an indispensable tool for quality control and stress inspection. Known as one of the most reliable stress analysis devices, a Polariscope helps manufacturers detect residual stresses and birefringence patterns in transparent materials like glass, PET bottles, and acrylics.