Patent ID: 7938545
Filing Date: 2011-05-10
Classification: G02B,G03B

Abstract:
1. A projection optical system configured to project an image of an object and form a final image on a plane, the projection optical system comprising: a first optical system including at least one dioptric system; a reflection part provided in an optical path of output light output from the first optical system; a second optical system provided in an optical path of light reflected from the reflection part, the second optical system including a reflecting surface having positive power, wherein the image of the object is formed as an intermediate image in an optical path of the first optical system, the reflection part, and the second optical system, and the intermediate image is magnified and projected, and the reflection part, the first optical system, and the second optical system are arranged at respective positions so that the reflection part is closer to a plane on which the final image is formed than is the first optical system, and the first optical system is closer to the plane than is the second optical system.