Optical path bending type zoom lens system and image taking...

Optical: systems and elements – Lens – With variable magnification

Reexamination Certificate

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C359S678000, C359S726000

Reexamination Certificate

active

11449699

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.

REFERENCES:
patent: 6754446 (2004-06-01), Hagimori et al.
patent: 6771432 (2004-08-01), Mihara
patent: 2003/0214726 (2003-11-01), Mihara
patent: 2004/0105020 (2004-06-01), Iwasawa
patent: 2005/0002115 (2005-01-01), Mihara
patent: 2000-131610 (2000-05-01), None

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