出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/25 17:51 UTC 版)
A polarizer is a device that converts a beam of electromagnetic waves (light) of undefined or mixed polarization into a beam with well-defined polarization. The common types of polarizers are linear polarizers and circular polarizers. Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography and liquid crystal display technology.