polariscope
/pəˈlɛrɪˌskoʊp/
noun
- An instrument that uses polarized light to examine the optical properties of materials, such as stress in glass or crystals.
- The engineer used a polariscope to check for stress patterns in the glass window.
- In the classroom, the teacher demonstrated how a polariscope reveals hidden colors in plastic.
- With a polariscope, the jeweler could identify real gemstones by their light patterns.