Patent ID: 9625691
Date: 2017-04-18
CPC Classifications: G02B

Claim:
1. A projection lens configured to form a real image from an image source disposed at an object side, the projection lens comprising: a lens group, having a first optical axis, wherein an intermediate image is formed by the lens group from the image source, the lens group comprises an aspheric lens, and a third optical axis of the aspheric lens is not coaxial with the first optical axis of the lens group; and an aspheric mirror, having a second optical axis and an aspheric surface, wherein the lens group is disposed between the object side and the aspheric mirror, the aspheric surface faces the lens group and reflects the intermediate image to form the real image of the image source at an image side, and the real image is a magnified real image of the intermediate image, wherein the first optical axis is not coaxial with the second optical axis, and a light ray transmitted along and on the first optical axis is not transmitted along and on the second optical axis.