Optical: systems and elements – Image stabilization – By movable refractive structure
Patent
1995-04-20
1997-01-28
Nguyen, Thong
Optical: systems and elements
Image stabilization
By movable refractive structure
359554, G02B 2764
Patent
active
055982999
ABSTRACT:
A photographic lens system having an image stabilizing function is disclosed, comprising, from front to rear, a first lens unit of positive refractive power and a second lens unit of negative refractive power, the second lens unit having a front lens sub-unit of negative refractive power and a rear lens sub-unit of positive refractive power, the first lens unit being moved axially to effect focusing, the front lens sub-unit being moved in directions perpendicular to an optical axis to correct the shake of an image at the focal plane, and the following conditions being satisfied:
REFERENCES:
patent: 4907868 (1990-03-01), Kitagishi et al.
patent: 4927250 (1990-05-01), Suda
patent: 4974950 (1990-12-01), Yamazaki et al.
patent: 5000549 (1991-03-01), Yamazuki
Canon Kabushiki Kaisha
Nguyen Thong
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