Zoom lens system

Details Zoom lens system Zoom lens system

2008-12-30

2010-10-19

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S682000

Reexamination Certificate

active

07817351

ABSTRACT:
A zoom lens system includes, in order from the object side, a negative first lens group, a positive second lens group; and a positive third lens group. The first lens group includes, in order from the object side to the image side, a negative first lens and a positive second lens. The second lens group includes, in order from the object side to the image side, a positive third lens, a negative fourth lens, and a negative fifth lens. The zoom lens system satisfies certain conditions related to the configuration of the lens and lens groups of the zoom lens system in order to provide a compact zoom lens having excellent correction of aberrations.

REFERENCES:
patent: 6785057 (2004-08-01), Ori
patent: 7492527 (2009-02-01), Tomioka
patent: 2007/0053072 (2007-03-01), Nanba

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