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:
Oct. 06, 2009
Filed:
Jan. 24, 2008
Minoru Taniyama, Saitama, JP;
Minoru Taniyama, Saitama, JP;
Fujinon Corporation, Saitama-shi, Saitama, JP;
Abstract
An imaging lens is provided and includes: in order from an object side of the imaging lens, an aperture diaphragm; a first lens having a positive refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on the object side; and a third lens having a meniscus shape having a convex surface on the object side in the vicinity of an optical axis thereof, each of the first lens, the second lens and the third lens having at least one aspherical surface, and the imaging lens satisfying the following conditional expressions.0.9<|2/  (1)1.2<|3/  (2)f represents a focal length of the imaging lens; frepresents a focal length of the second lens; and frepresents a focal length of the third lens.