Zoom lens incorporating vibration-proofing function

Details Zoom lens incorporating vibration-proofing function Zoom lens incorporating vibration-proofing function

1993-10-07

1996-03-26

Epps, Georgia Y.

Optical: systems and elements

Image stabilization

By movable refractive structure

359764, 359677, G02B 2764

Patent

active

055025943

ABSTRACT:
A zoom lens incorporating a vibration-proofing function comprises, sequentially from an object side, a first lens group G.sub.1 having a positive refracting power; a second lens group G.sub.2 having a negative refracting power; a third lens group G.sub.3 having a negative refracting power; a fourth lens group G.sub.4 having a positive refracting power; and a fifth lens group G.sub.5 having a negative refracting power. The lens groups move so that when varying a magnifying power from a wide-angle end to a telephoto end, a spacing between the first and second lens groups G.sub.1, G.sub.2 increases; a spacing between the second and third lens groups G.sub.2, G.sub.3 changes linearly or non-linearly; and a spacing between the fourth and fifth lens groups G.sub.4, G.sub.5 is reduced. The zoom lens comprises a shift means for moving one of the third and fourth lens groups G.sub.3, G.sub.4 perpendicularly across the optical axis.

REFERENCES:
patent: 4576446 (1986-03-01), Kamata
patent: 5000549 (1991-03-01), Yamazaki
patent: 5040881 (1991-08-01), Tsuji
patent: 5325233 (1994-06-01), Nakatsuji et al.
Patent Abstracts of Japan, vol. 13, No. 480 (P-952), Oct. 31, 1989 (JP-A-01 191 112).
Patent Abstracts of Japan, vol. 13, No. 480 (P-952), Oct. 31, 1989 (JP-A-01 191 113).
Patent Abstracts of Japan, vol. 13, No. 478 (P-951), Oct. 30, 1989 (JP-A-01 189 621).
Patent Abstracts of Japan, vol. 10, No. 22 (P-424), Jan. 28, 1986 (JP-A-60 175 200).

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