Zoom lens system

Details Zoom lens system Zoom lens system

1998-08-05

2000-04-04

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359683, 359685, G02B 1514

Patent

active

060468629

ABSTRACT:
A zoom lens system includes three lens groups. The first lens group and the third lens group have a positive refractive power, and the second lens group has a negative refractive power. The second lens group and the third lens group move along an optical axis when zooming from a wide-angle position to a telephoto position. The zoom lens system satisfies the following conditions:

REFERENCES:
patent: 4984876 (1991-01-01), Hata
patent: 5247393 (1993-09-01), Sugawara
patent: 5296969 (1994-03-01), Mihara
patent: 5784205 (1998-07-01), Nakayama et al.

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