polariscope

A polariscope is an optical device used to analyze materials based on their interaction with polarized light. It consists of a light source, polarizing filters, and a viewing system. When light passes through a material placed between the filters, it can reveal stress, strain, or different optical properties of the material. This technique is useful in various fields, including materials science, engineering, and gemology, to examine the structural integrity of objects or identify gemstones by their unique light characteristics. Essentially, it helps visualize the internal properties of transparent materials that are otherwise invisible to the naked eye.