Optical: systems and elements – Lens – Reverse telephoto
Reexamination Certificate
2009-10-16
2011-10-18
Sugarman, Scott J (Department: 2873)
Optical: systems and elements
Lens
Reverse telephoto
C359S753000, C359S756000, C359S761000
Reexamination Certificate
active
08040618
ABSTRACT:
An imaging lens includes, in order from an object side, a positive first lens group, a stop, and a positive second lens group. The first lens group includes, in order from the object side, a first lens, which is a negative meniscus lens having a convex object-side surface, and a second lens having a positive power and including a convex image-side surface. The second lens group includes, in order from the object side, a third lens having a negative power and including a concave object-side surface, a fourth lens having a positive power and including a convex image-side surface, a fifth lens, which is a biconvex lens, and a sixth lens, which is a meniscus lens having a negative power and including a convex surface facing an image side. Each of the first to sixth lenses is a single spherical glass lens.
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patent: 2006/0238891 (2006-10-01), Ogata
patent: 3254239 (2002-02-01), None
patent: 3478643 (2003-12-01), None
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patent: 3964533 (2007-08-01), None
Birch & Stewart Kolasch & Birch, LLP
Fujinon Corporation
Sugarman Scott J
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