A polarizing device has an arrangement of generally parallel elements disposed in an unpolarized source light beam for transmitting polarizations perpendicular to the elements and reflecting polarizations parallel to the elements. The elements may be disposed at substantially any incidence angle and...http://www.google.com.au/patents/US6108131?utm_source=gb-gplus-sharePatent US6108131 - Polarizer apparatus for producing a generally polarized beam of light
