Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2007-11-16
2009-10-20
Choi, William C (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
Reexamination Certificate
active
07605987
ABSTRACT:
The invention relates to a zoom optical system that, albeit having high zoom capabilities, has its total length reduced in consideration of size reductions upon received at a lens mount, and an imaging apparatus using the same. The zoom optical system comprises, in order from its object side, a positive first lens group, a negative second lens group, a positive third lens group and a positive fourth lens group. Upon zooming from the wide-angle end to the telephoto end, the second lens group moves in such a way as to lie more on the imaging plane side at the telephoto end than at the wide-angle end, and the third lens group moves. A lens component L21having negative refracting power is located in, and nearest to the object side of, the second lens group, and satisfies both condition (1) with respect to its shaping factor and condition (2) with respect to its focal length.
REFERENCES:
patent: 5748381 (1998-05-01), Ono
patent: 2004-94233 (2004-03-01), None
patent: 2005-181499 (2005-07-01), None
Choi William C
Kenyon & Kenyon LLP
Olympus Imaging Corp.
LandOfFree
Zoom optical system and imaging apparatus incorporating the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Zoom optical system and imaging apparatus incorporating the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom optical system and imaging apparatus incorporating the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4091107