Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2008-05-13
2008-05-13
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S678000, C359S726000
Reexamination Certificate
active
07372635
ABSTRACT:
A zoom lens system comprises, in order from an object side, a positive first lens unit including a reflective optical element, a negative second lens unit, a positive third lens unit and a positive fourth lens unit, or a positive first lens unit, a negative second lens unit, a positive third lens unit, a negative fourth lens unit and a positive fifth lens unit. During zooming from a wide-angle end toward a telephoto end, the first lens unit is fixed, at least the second and third lens units move, and a space between the lens units changes. The second lens unit is positioned closer to an image-surface side in the telephoto end than in the wide-angle end, and the third lens unit is positioned closer to the object side in the telephoto end than in the wide-angle end. An image taking apparatus including the zoom lens system is also disclosed.
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patent: 6771432 (2004-08-01), Mihara
patent: 2003/0214726 (2003-11-01), Mihara
patent: 2004/0105020 (2004-06-01), Iwasawa
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Kimata Hirohiko
Morooka Masaru
Shirota Eiji
Collins Darryl J.
Kenyon & Kenyon LLP
Olympus Imaging Corp.
Sugarman Scott J.
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