A polarization device includes an optical stack with a diffraction grating and a wire grid polarizer with one disposed over the other. The wire grid polarizer includes an array of elongated, parallel conductive wires in accordance with PWGP<λ/2 where PWGP is the period of the wires and λ is the wavelength...http://www.google.com.au/patents/US20080266662?utm_source=gb-gplus-sharePatent US20080266662 - Polarization device to polarize and further control light
