The Polariscope is primarily used for stress and strain analysis in transparent or semi-transparent materials. Plastics, glass, and even certain crystalline formations are examples. An instrument, which uses polarization light, can detect the presence of internal tensions or structural irregularities in these materials. This is a crucial benefit for industries like automotive, aerospace, and glass manufacturing, where the structural integrity of materials is vital. Detecting stress points early can prevent catastrophic failures and ensure product longevity.