Zoom lens

Details Zoom lens Zoom lens

1995-01-27

1997-05-27

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, 359689, G02B 1514

Patent

active

056337604

ABSTRACT:
There is provided a wide-angle zoom lens including in the following order from the object side: a first lens group having a positive refractive power, the first lens group consisting of, in the following order from the object side, a front lens subgroup which consists of a negative lens, and a rear lens subgroup which consists of at least one positive lens and at least one negative lens; and a second lens group having a negative refractive power, wherein an air gap between the first and second lens groups decreases upon zooming from a wide-angle end to a telephoto end, and the zoom lens satisfies the following conditions:

REFERENCES:
patent: 4679913 (1987-07-01), Sato et al.
patent: 4848883 (1989-07-01), Maruyama
patent: 4929069 (1990-05-01), Shibayama
patent: 5126884 (1992-06-01), Sato
patent: 5463499 (1995-10-01), Ito et al.

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