Zoom lens and video camera using it

Details Zoom lens and video camera using it Zoom lens and video camera using it

2006-02-14

2006-02-14

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000, C359S684000

Reexamination Certificate

active

06999240

ABSTRACT:
A zoom lens capable of correcting camera shake and being reduced in size and weight, comprising five groups of lenses respectively having positive, negative, positive, negative, positive refractive powers, the second lens group (12) varying power, the fifth lens group (15) adjusting focusing. The third lens group (13) is moved in a direction perpendicular to the optical axis when correcting camera shake. When lens power on the object side of a cemented lens in the first lens group (11) is φ11, lens power on the image plane side φ12, the Abbe number of a lens on the object side νd11, and the Abbe number of a lens on the image plane side νd12, the condition of the following Expression 82 is satisfied:in-line-formulae description="In-line Formulae" end="lead"?−75<νd11νd12(φ11+φ12)/(φ11νd12+φ12νd11)<−50.Expression 82.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6392816 (2002-05-01), Hamano
patent: 6763186 (2004-07-01), Hamano
patent: 2004/0218274 (2004-11-01), Aoki
patent: 1 103 834 (2001-05-01), None
patent: 7-128619 (1995-05-01), None
patent: 8-29737 (1996-02-01), None

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