Patent ID: 7517094

Claim:
A projection device comprising: a reflective light modulator for generating an image, said light modulator comprising a plurality of independently controllable pixels which are arranged substantially in one image plane and can be respectively put in at least one of a first and a second state and which form an image-generating region; a light source unit for illuminating the pixels; projection optics including first and second partial optics, said projection optics having an optical axis; wherein the light source unit, during operation of the projection device, emits an illumination ray bundle for illumination of the pixels, said illumination ray bundle passing through the first partial optics, which contain at least a first lens, and then impinging on the pixels; and wherein the light reflected by the pixels being in the first state passes, as a projection ray bundle for projection of the image onto a projection surface, through the first partial optics and then through the second partial optics, and wherein, upon passage of the illumination ray bundle through the first partial optics, a respective reflection ray bundle is generated by the first partial optics at each optical boundary surface of each lens of the first partial optics, said reflection ray bundle propagating up to the second partial optics without further reflection at the optical boundary surfaces; and wherein each optical boundary surface of each lens of the first partial optics is offset and/or tilted in the reference plane relative to the optical axis such that, in a reference plane in which the optical axis of the projection optics is located and which is divided by the optical axis into upper and lower half-planes, each reflection ray bundle exiting the first partial optics proceeds completely either into the first or into the second half-plane, in order to prevent the reflection ray bundles from being projected onto the projection surface.