Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2004-03-29
2008-10-21
Mack, Ricky (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
Reexamination Certificate
active
07440195
ABSTRACT:
A zoom lens system for directing an optical image on an electric image sensor that includes a first lens unit disposed on a most object side and having a negative optical power, a second lens unit having a positive optical power, and a third lens unit including a most image side lens unit having at least a positive lens element and a negative lens element, wherein the following condition is satisfied:in-line-formulae description="In-line Formulae" end="lead"?3<|fl/fw|in-line-formulae description="In-line Formulae" end="tail"?where fl is a focal length of the most image side lens unit, and fw is a focal length of the zoom lens system in a shortest focal length condition.
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Hagimori Hitoshi
Ishimaru Kazuhiko
Greece James R
Konica Minolta Camera, Inc.
Mack Ricky
Sidley Austin LLP
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