Patent ID: 8027025

Claim:
An exposure apparatus which exposes a substrate with exposure light, comprising: a projection optical system which projects a pattern image of an original onto the substrate; a first illumination unit which illuminates the original with the exposure light using a modified illumination; and a plurality second illumination unit which guides illumination light that is different from the exposure light for exposing the substrate to said projection optical system, wherein said second illumination unit includes a modifier which changes an illumination distribution of the illumination light transmitting through an optical element near a pupil of said projection optical system and an optical element which is the closest to the original in said projection optical system, wherein the modifier forms a rotationally symmetric illumination distribution based on the illumination distribution formed by said first illumination unit, as a sum of an illumination distribution formed by the plurality of second illumination units and an illumination distribution formed by said first illumination unit, on said optical element near the pupil of said projection optical system and on said optical element which is the closest to the original in said projection optical system.