Taking optical system having a hand-shake correction function

Details Taking optical system having a hand-shake correction function Taking optical system having a hand-shake correction function

1997-03-25

1999-12-14

Nguyen, Thong

Optical: systems and elements

Image stabilization

By movable refractive structure

359554, 359558, G02B 2764

Patent

active

060025190

ABSTRACT:
A taking optical system capable of correcting an image blur resulting from vibration of the optical system consists of a first positive lens unit, a second negative lens unit, a third positive lens unit, and a fourth negative lens unit, and achieves zooming by varying distances between these lens units. The second lens unit includes a decentered lens element, which has a diffracting optical surface formed on its image-side surface, so that an image blur is corrected by decentering the decentered lens element translationally.

REFERENCES:
patent: 4998809 (1991-03-01), Tsuji et al.
patent: 5040881 (1991-08-01), Tsuji
patent: 5121978 (1992-06-01), Maruyama
patent: 5168403 (1992-12-01), Umeda et al.
patent: 5268790 (1993-12-01), Chen

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