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:
Jan. 24, 2012
Filed:
Jun. 05, 2008
Applicant:
Minoru Taniyama, Saitama, JP;
Inventor:
Minoru Taniyama, Saitama, JP;
Assignee:
Fujinon Corporation, Saitama-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a positive power; a second lens having a negative power; a third lens having a positive power and having a convex surface on an image side thereof; and a fourth lens having a negative power and having a concave surface or a flat surface on the object side and in a vicinity of an optical axis thereof, and the imaging lens satisfies conditional expression:0.28<|4/|<0.60   (1)where f is a focal length of the imaging lens, and f4 is a focal length of the fourth lens.