Zoom lens

Details Zoom lens Zoom lens

2008-07-15

2008-07-15

Choi, William C (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000

Reexamination Certificate

active

07400453

ABSTRACT:
A zoom lens is provided and has a first group having a positive refractive power, a second group having a negative refractive power, an aperture stop, a third group having a positive refractive power and a fourth group having a positive refractive power, which groups are arranged in this order from the object side. The first group has a three-group four-lens configuration where a cemented lens of a negative lens and a positive lens, and two positive single-lenses and are disposed in this order from the object side. The second group has a three-group four-lens configuration where two single-lenses and each having a negative refractive power with a strong concave surface on the image side, and a cemented lens of a double-concave lens and a positive lens are disposed in this order from the object side.

REFERENCES:
patent: 5654826 (1997-08-01), Suzuki
patent: 6094312 (2000-07-01), Nakayama
patent: 6104547 (2000-08-01), Nanba
patent: 2003/0151828 (2003-08-01), Ozaki
patent: 2005/0088756 (2005-04-01), Yamada
patent: 3601733 (2004-10-01), None

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-2761544