A multilayer wire-grid polarizer for polarizing light includes a stack of thin film layers disposed over a substrate, including a wire-grid array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light. One of the layers...http://www.google.se/patents/US7813039?utm_source=gb-gplus-sharePatent US7813039 - Multilayer wire-grid polarizer with off-set wire-grid and dielectric grid
