Zoom lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 9, 2017
Issued Date -
N/A
app pub date -
Jan 10, 2012
filing date -
Apr 19, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An embodiment of this invention provides a zoom lens that includes, in order from an object side to an image-forming side, a first lens group having positive refraction power; a second lens group having negative refraction power; a third lens group having positive refraction power; and a fourth lens group having positive refraction power; wherein the second lens group and the fourth lens group move along an optical axis for zooming between a wide-angle end and a telephoto end.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully