Patent ID: 8777427

Claim:
A method of projecting an image onto a display surface with an image offset of greater than 100% and a throw ratio of 0.15 or less, comprising: providing an illumination source, a spatial light modulator and projection optics within a housing having an opening; modulating light received from the illumination source using a spatial light modulator; projecting the modulated light with the projection optics along an optical axis to an exit pupil generally aligned with the housing opening, the projection optics having optical properties to correct for image pixel grid distortion in an image formed by the projected light; providing a light transparent dome mounted over the housing opening providing physical protection for the projection optics and having a center of curvature decentered by an offset in one or more of x, y and z directions from alignment with the exit pupil extending through the optical axis; and transmitting the light projected by the projection optics through the light transmitting dome, the dome having optical properties to further correct for image pixel grid distortion in the image formed by the projected light.