OPTICAL SYSTEM FOR A DISPLAY WITH AN OFF AXIS PROJECTOR

An optical projection system provides part of a display system that presents a displayed virtual image at a predetermined distance in front of a viewing position. Said display system comprises a projection system and a primary reflecting optic that deflects an off-axis incoming optical signal from the projection system toward the viewing position. Said projection system is arranged to provide an adapted output image signal that compensates for optical aberration effects introduced by the reflecting optic to ensure provision of a reduced aberration display image to the viewing position, and where the reflecting optic comprises a grating structure.