Patent ID: 8500286

Claim:
A projection system, the projection system comprising: an illumination unit; a PBS (Polarizing Beam Splitter) reflecting the light from the illumination unit, transmitting an image light, and having a structure in which a width of an area facing projection lenses is larger than that of an area perpendicular to an area facing the projection lenses; a display device receiving the light reflected from the PBS and outputting the light as an image light; and a projection unit including a body tube having an entrance pupil and an exit pupil, and a through hole equipped with the projection lenses for projecting the image light outputted from the display device to a screen; wherein the entrance pupil is a path into which the image light is incident towards the projection unit, the exit pupil is a path through which the image light is projected to the screen via the projection lenses, and wherein a width of the PBS is larger than that of the entrance pupil to inhibit formation of a ghost by the image light.