Optical: systems and elements – Compound lens system – With curved reflective imaging element
Reexamination Certificate
2006-01-10
2006-01-10
Sikder, Mohammad (Department: 2872)
Optical: systems and elements
Compound lens system
With curved reflective imaging element
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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Beierl Helmut
Fürter Gerhard
Schuster Karl-Heinz
Shafer David R.
Ulrich Wilhelm
Carl Zeiss SMT AG
Sikder Mohammad
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