Optical: systems and elements – Lens – With reflecting element
Reexamination Certificate
2006-02-07
2006-02-07
Spector, David (Department: 2873)
Optical: systems and elements
Lens
With reflecting element
C359S364000, C359S649000
Reexamination Certificate
active
06995930
ABSTRACT:
A projection exposure lens has an object plane, optical elements for separating beams, a concave mirror, an image plane, a first lens system arranged between the object plane and the optical elements for separating beams, a second double pass lens system arranged between the optical elements for separating beams and the concave mirror, a third lens system arranged between the optical elements for separating beams and the image plane. The second lens system has a maximum of five lenses.
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Beierl Helmut
Dodoc Aurelian
Epple Alexander
Shafer David R.
Ulrich Wilhelm
Carl Zeiss SMT AG
Choi William
Spector David
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