Zoom lens

Details Zoom lens Zoom lens

2007-08-07

2008-08-12

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000, C359S684000, C359S685000, C359S708000, C359S713000, C359S740000, C359S755000

Reexamination Certificate

active

07411740

ABSTRACT:
Disclosed is a zoom lens, which includes, in sequence from an object side to an image side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, a fifth lens group, a negative sixth lens group and a positive lens group. The first, third, fifth and seventh lens groups are fixed. When the zoom lens is made to zoom from a wide-angle end to a telephoto end, the second and fourth lens groups move toward the third lens group, while the sixth lens group moves toward the seventh lens group. The absolute value of the ratio of the focal distance of the second lens group to that of the sixth lens group is within a range between 0.1 and 0.5.

REFERENCES:
patent: 6785055 (2004-08-01), Nishikawa et al.
patent: 6989939 (2006-01-01), Yamasaki et al.
patent: 7224535 (2007-05-01), Neil
patent: 7312934 (2007-12-01), Iwasawa
patent: 7327953 (2008-02-01), Tamura
patent: 2004/0021953 (2004-02-01), Betensky et al.
patent: 2004/0201902 (2004-10-01), Mihara et al.
patent: 2005/0259330 (2005-11-01), Neil
patent: 2006/0056043 (2006-03-01), Nakazawa et al.

Affiliated with

Also associated with

Rating

Zoom lens 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 lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4019634