Optical illumination device, exposure device and exposure method
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United States of America Patent
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Jul 5, 2005
Grant Date -
Feb 26, 2004
app pub date -
May 27, 2003
filing date -
May 27, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides an optical illumination device that permits an increase in the fill of a multiplicity of light sources that constitute a secondary source formed on an illuminated pupil plane. A fly's eye lens that forms a multiplicity of light sources from a light beam emitted by an optical integrator is disposed in the optical path between the optical integrator and an irradiation surface. The fly's eye lens comprises, in order from the light-source side, a first fly's eye member and a second fly's eye member. A cylindrical lens group arranged in a first direction is formed on each of the light source-side surface of a first fly's eye member and the light source-side surface of a second fly's eye member, and a cylindrical lens is group arranged in a second direction orthogonal to the first direction is formed on each of the irradiation surface side surface of the first fly's eye member and the irradiation surface side surface of the second fly's eye member.
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