A Wollaston prism is a device used in optics to split light into two beams of polarized light, which have perpendicular orientations. This prism was named after William Hyde Wollaston, who discovered it in the 19th century. There are several other names for this device, including Wollaston polarizer, Wollaston beam splitter, and Wollaston prism polarizer. The use of different names for the same device can be confusing, but it is important to understand that they all refer to the same instrument. The Wollaston prism has applications in various fields of science, including molecular biology, physics, and chemistry.