Lens capable of short distance photographing with vibration redu

Details Lens capable of short distance photographing with vibration redu Lens capable of short distance photographing with vibration redu

1995-08-02

1998-05-12

Nguyen, Thong

Optical: systems and elements

Image stabilization

By movable refractive structure

359554, 359689, G02B 2764, G02B 1514

Patent

active

057514852

ABSTRACT:
A lens capable of a short distance photographing satisfies .vertline..beta.M.vertline.>0.25 (.beta.M is the photographing magnification at a shortest photographing distance). The lens includes a plurality of lens groups respectively having positive or negative refracting powers. An interval between two neighboring lens groups changes for focusing, and at least a partial lens group, located at an image side of a lens group which is movable for focusing, is a vibration reduction lens group which is movable in a direction substantially perpendicular to an optical axis.

REFERENCES:
patent: 4978205 (1990-12-01), Sato
patent: 4986643 (1991-01-01), Moriyama
patent: 5000549 (1991-03-01), Yamazaki
patent: 5000551 (1991-03-01), Shibayama
patent: 5007720 (1991-04-01), Hamanishi
patent: 5039211 (1991-08-01), Hariyama
patent: 5040881 (1991-08-01), Tsuji
patent: 5249079 (1993-09-01), Umeda
patent: 5442486 (1995-08-01), Sato

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