Wide angle lens and imaging apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 8, 2016
Grant Date -
Jul 2, 2015
app pub date -
Mar 12, 2015
filing date -
Sep 14, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wide angle lens consists of a front group, a stop, and a positive rear group in order from the object side. A positive lens with a convex surface on the object side and a lens having a negative meniscus shape with a convex surface on the object side are respectively disposed first and second from the object side in the front group. When Abbe number with respect to the d-line and the partial dispersion ratio between the g-line and the F-line of the lens having a negative meniscus shape are taken as νdf and θgFf respectively, the wide angle lens satisfies a conditional expression (1): 0.038<θgFf −0.6415+0.001618×νdf and a conditional expression (2): νdf<19.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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