Zoom lens and electronic imaging apparatus having the same

Details Zoom lens and electronic imaging apparatus having the same Zoom lens and electronic imaging apparatus having the same

2007-10-30

2007-10-30

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S677000, C359S683000, C359S686000, C359S689000, C359S691000, C359S693000, C359S713000, C359S714000, C359S715000, C359S716000, C359S717000, C359S718000, C359S740000

Reexamination Certificate

active

11076236

ABSTRACT:
A zoom lens includes, in order from the object side, the first lens unit consisting of one negative lens component in which a plurality of lens components are cemented to one another and the second lens unit including one negative lens component and having positive refracting power as a whole. In this case, the zoom lens satisfies the following condition:in-line-formulae description="In-line Formulae" end="lead"?0.15<t1/fw<0.6in-line-formulae description="In-line Formulae" end="tail"?where t1is the thickness, measured along the optical axis, of the first lens unit and fw is the focal length of the entire system at the wide-angle position of the zoom lens.

REFERENCES:
patent: 6124984 (2000-09-01), Shibayama et al.
patent: 2003/0058548 (2003-03-01), Itoh
patent: 2004/0169764 (2004-09-01), Ishii et al.
patent: 2003-177315 (2003-06-01), None

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