Zoom lens and image pickup apparatus equipped with same

Details Zoom lens and image pickup apparatus equipped with same Zoom lens and image pickup apparatus equipped with same

2007-05-02

2008-08-26

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000, C359S774000, C359S772000

Reexamination Certificate

active

07417802

ABSTRACT:
A zoom lens comprises, in the following order from the object side to the image side, a positive first lens unit, a negative second lens unit, which moves during zooming, a positive third lens unit, and a positive fourth lens unit, which moves during zooming. The first lens unit includes a negative lens subunit and a positive lens subunit. The negative lens subunit includes at least two negative lenses each having a concave surface facing the image side and at least one positive lens arranged from the object side. The positive lens subunit includes at least one biconvex positive lens, a negative lens and at least two positive lenses arranged from the object side, or at least one biconvex positive lens, a cemented lens composed of a negative lens and a positive lens and at least one positive lens arranged from the object side.

REFERENCES:
patent: 5694252 (1997-12-01), Yahagi
patent: 7268955 (2007-09-01), Ogata
patent: 11-287952 (1999-10-01), None
patent: 11-287954 (1999-10-01), None
patent: 2002-365539 (2002-12-01), None

Affiliated with

Also associated with

Rating

Zoom lens and image pickup apparatus equipped with 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 equipped with 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 equipped with same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4015233