Zoom lens and image pickup apparatus having the same

Details Zoom lens and image pickup apparatus having the same Zoom lens and image pickup apparatus having the same

2011-03-22

2011-03-22

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000, C348S240300

Reexamination Certificate

active

07911707

ABSTRACT:
A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power. In the zoom lens, an interval between every adjacent ones of the first through fourth lens units varies during zooming, the second lens unit includes at least one negative lens, and the third lens unit includes at least one positive lens. An Abbe number and a relative partial dispersion of a material of the at least one negative lens (νd2N, θgF2N) and an Abbe number and a relative partial dispersion of a material of the at least one positive lens (νd3P, θgF3P) are appropriately set.

REFERENCES:
patent: 5710669 (1998-01-01), Endo
patent: 7535650 (2009-05-01), Ohashi
patent: 7599123 (2009-10-01), Yamamoto
patent: 7639430 (2009-12-01), Shirasuna
patent: 7777967 (2010-08-01), Hirakawa
patent: 2010/0033848 (2010-02-01), Hatada
patent: 2001-042217 (2001-02-01), None
patent: 2002-287031 (2002-10-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2668675