Zoom optical system that includes a function of preventing...

Details Zoom optical system that includes a function of preventing... Zoom optical system that includes a function of preventing...

2007-05-01

2007-05-01

Ortiz, Angela (Department: 2891)

Optical: systems and elements

Lens

With variable magnification

C359S684000, C359S685000, C359S686000, C359S774000

Reexamination Certificate

active

11365841

ABSTRACT:
A zoom optical system includes a function of preventing blurring of an image due to movements, such as shaking of the zoom optical system, by moving a lens element of the third lens group, in order from the object side, of four lens groups in a direction that is perpendicular to the optical axis in order to correct for movements of the zoom optical system that would otherwise create a blurred image. The second lens group from the object side has negative refractive power and the other three lens groups have positive refractive power. The second and fourth lens groups move along the optical axis during zooming. The zoom optical system satisfies certain conditions related to the configuration of the lens elements and lens groups of the zoom optical system in order to prevent blurring and to provide a compact zoom optical system having excellent correction of aberrations.

REFERENCES:
patent: 6473231 (2002-10-01), Hamano et al.
patent: 6606194 (2003-08-01), Hamano et al.
patent: 6995923 (2006-02-01), Noda
patent: 7139130 (2006-11-01), Yamada
patent: 2002/0063961 (2002-05-01), Hamano et al.
patent: 2003/0123157 (2003-07-01), Nishimura
patent: 2006/0072213 (2006-04-01), Shibayama et al.
patent: 08234107 (1996-09-01), None

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