Catadioptric optical system and exposure apparatus having...

Optical: systems and elements – Compound lens system – With curved reflective imaging element

Reexamination Certificate

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C359S355000, C359S364000

Reexamination Certificate

active

06985286

ABSTRACT:
A projection exposure lens system has an object side catadioptric system, and intermediate image and a refractive lens system. The refractive lens system from its intermediate image side and in the direction of its image plane has a first lens group of positive refractive power, a second lens group of negative refractive power, a third lens group of positive refractive power, a fourth lens group of negative refractive power, and a fifth lens group of positive refractive power.

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