Patent ID: 7984992
Filing Date: 2011-07-26
Classification: G02B,G03B,H04N

Abstract:
1. A projection optical system comprising: a first optical part which projects an image; a second optical part including an image forming device which forms an image using a light, and emits the image to the first optical part, wherein the second optical part has an optical axis, and wherein the optical axis of the second optical part is angled toward an optical axis of the first optical part; a third optical part including at least one light source, which emits the light, wherein the third optical part has an optical axis, and wherein the optical axis of the third optical part is angled toward the optical axis of the second optical part; and a deflector which guides the light emitted from the third optical part toward the second optical part, wherein a pupil plane of the second optical part is located between the first optical part and the second optical part, and a first cross-point, which is between the optical axis of the first optical part and the pupil plane of the second optical part, is separated from a second cross-point, which is between the optical axis of the second optical part and the pupil plane of the second optical part.