The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Apr. 02, 2009
Yoshitomo Onoda, Kanagawa, JP;
Yoshitomo Onoda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An image pickup lens includes, in order from an object side, a first lens element having a positive refractive power and a convex surface facing the object side, an aperture stop adjusting the amount of light, a second lens element having a negative refractive power, a third lens element having a positive refractive power and a concave surface facing the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied,0.6<|2/|<1.80≦2/4<1.7where f denotes a focal length of an entire lens system, fdenotes a focal length of the second lens element, and Rdenotes a curvature radius of an object-side surface of the second lens element.