Zoom lens system and electronic image pickup apparatus using...

Details Zoom lens system and electronic image pickup apparatus using... Zoom lens system and electronic image pickup apparatus using...

2006-11-21

2010-06-01

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S682000, C359S683000, C359S684000, C359S685000, C359S689000, C359S716000, C359S740000, C359S753000, C359S784000, C359S761000, C359S770000, C359S781000

Reexamination Certificate

active

07729058

ABSTRACT:
A zoom lens system includes, in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. During zooming from a wide-angle end to a telephoto end, a space between the first lens unit and the second lens unit narrows, at least the second lens unit moves only toward the object side, and the third lens unit is constituted of one positive lens.

REFERENCES:
patent: 6191896 (2001-02-01), Itoh
patent: 6233099 (2001-05-01), Itoh
patent: 6351337 (2002-02-01), Tanaka
patent: 6611386 (2003-08-01), Tanaka
patent: 2001/0022694 (2001-09-01), Tanaka
patent: 2003/0169508 (2003-09-01), Ori
patent: 2000-284177 (2000-10-01), None
patent: 2001-242378 (2001-09-01), None

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