Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2011-07-05
2011-07-05
Spector, David N (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S557000, C359S683000
Reexamination Certificate
active
07974012
ABSTRACT:
A zoom lens system has a front lens group and a rear lens group along the optical axis and in order from the object side. The rear lens group has a first lens unit having a positive refracting power, a second lens unit having a negative refracting power, and a third lens unit having a positive refracting power. Upon zooming from a wide-angle end state to a telephoto end state, a space between the front lens group and the first lens unit varies, a space between the first lens unit and the second lens unit increases, and a space between the second lens unit and the third lens unit decreases. At least a part of the second lens unit is movable so as to have a component in a direction perpendicular to the optical axis.
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English-language translation of Japanese Patent Application Publication JP2006-081155 A, downloaded from IPDL website <http://www.ipdl.inpit.go.jp/homepg—e.ipdl> on Aug. 19, 2010.
Miles & Stockbridge P.C.
Nikon Corporation
Spector David N
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