A head-up display includes a projection system and a window having a target area where a reflective polarizer is positioned to reflect light from the projection system to a viewing area. Light from the projection system is p-polarized and strikes exposed window surface(s) at an acute angle to reduce...http://www.google.co.uk/patents/US20040135742?utm_source=gb-gplus-sharePatent US20040135742 - Head-up display with polarized light source and wide-angle p-polarization reflective polarizer
