Patent ID: 6727981
Filing Date: 2004-04-27
Classification: G03B,G03F

Abstract:
An illuminating optical apparatus to illuminate an object with an energy beam from a light source, comprising:at least one of a first optical member which is arranged in between said light source and said object and is housed in a first frame, said first optical member being movable in the first frame a plurality of second optical members which are arranged in between said first optical member and said object and are respectively housed in a plurality of second frames different from said first frame, and of which a movable amount is smaller than a movable amount of said first optical member; a first connecting member which is provided in between said first frame and said second frame, encloses an optical path of said energy beam between said first frame and said second frame, and displaceably connects said first frame to said second frame; and a second connecting member which is provided among said second frames, and connects said second frames so as to suppress a displacement among said second frames.