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:
Sep. 29, 2009
Filed:
Mar. 29, 2007
Kenichi Sato, Saitama, JP;
Minoru Taniyama, Saitama, JP;
Kenichi Sato, Saitama, JP;
Minoru Taniyama, Saitama, JP;
Fujinon Corporation, Saitama-shi, JP;
Abstract
An imaging lens includes first to third lenses Gto Garranged in order from a object side. The first lens has a biconvex shape in a vicinity of an optical axis Z. The second lens has a concave surface facing a object side. The second lens has a negative refractive power. The third lens has a positive or negative refractive power and has a meniscus shape containing, in a vicinity of the optical axis, a convex surface facing the object side. The following conditional expression is satisfied:0.7<1/<1.30.2≦2/<0.5where f denotes a focal length of the entire system of the imaging lens, fdenotes a focal length of the first lens Gand Ddenotes an interval on the optical axis Zbetween the first lens Gand the second lens G