Patent ID: 8144308

Claim:
An illumination optical apparatus which illuminates an illumination target surface on the basis of light from a light source, the illumination optical apparatus comprising: a first spatial light modulator arranged in an optical path of the illumination optical apparatus, said first spatial light modulator having a plurality of first optical elements which are arranged two-dimensionally and postures of which each are individually controlled, and modulating light incident thereon to a first light with a first angle distribution; a second spatial light modulator arranged at a position where the first light having traveled via the first spatial light modulator arrives, said second spatial light modulator having a plurality of second optical elements which are two-dimensionally arranged and postures of which each are individually controlled, and modulating the first light incident thereon to a second light with a second angle distribution; and a distribution forming optical system arranged in an optical path between the second spatial light modulator and an illumination pupil of the illumination optical apparatus, said distribution forming optical system condensing the second light with the second angle distribution and forming a predetermined light intensity distribution on an illumination pupil of the illumination optical apparatus.