Patent ID: 8081296
Filing Date: 2011-12-20
Classification: G03F

Abstract:
1. A reflection type illumination optical apparatus for illuminating an irradiated plane and forming an illumination region on the irradiated plane, the illumination optical apparatus comprising: an illumination optical system including a plurality of reflection mirrors arranged to guide illumination light flux to the irradiated plane; a first partial field stop arranged in an optical path of the illumination optical system and forming a first profile line of the illumination region that is to be formed on the irradiated plane; and a second partial field stop arranged between the illumination optical system and the irradiated plane and forming only a second profile line of the illumination region; wherein the illumination optical system includes a relay optical system consisting of reflective mirrors, wherein the relay optical system is arranged in an optical path between the first partial field stop and the second partial field stop and substantially optically conjugates a position of or the vicinity of the first partial field stop and a position of or the vicinity of the second partial field stop.