Optical: systems and elements – Image stabilization – By movable refractive structure
Reexamination Certificate
2008-05-06
2008-05-06
Dang, Hung (Department: 2873)
Optical: systems and elements
Image stabilization
By movable refractive structure
C359S554000, C359S813000, C348S208110, C396S055000, C396S073000
Reexamination Certificate
active
11436557
ABSTRACT:
A zoom lens wherein the image plane movement upon lens shifting is minimized. A power variation section and a final lens group are disposed in order from an object side. The power variation section includes at least two lens groups movable in an optical axis direction to vary a lens position state. The final lens group is fixed in the optical axis direction and includes first to third sub groups having negative, positive and positive refracting powers and disposed in order from the object side. The second sub group is shiftable substantially perpendicularly to the optical axis to shift an image. A conditional expression 0.2<ft/fBt<0.8 is satisfied where ft and fBt are the focal distances of the lens system and entire lens groups disposed on the object side of the third sub group in the telephoto end state.
REFERENCES:
patent: 6587271 (2003-07-01), Shinohara
patent: 2003/0053210 (2003-03-01), Shinohara
patent: 2000-121938 (2000-04-01), None
patent: 2002-244037 (2002-08-01), None
patent: 2003-226001 (2003-08-01), None
patent: 2003-295057 (2003-10-01), None
European Search Report, Application No./Patent No.; 06114529.8-2217; dated Oct. 16, 2006.
Dang Hung
Martinez Joseph
Sony Corporation
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