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:
May. 29, 2012
Filed:
Apr. 26, 2011
Hiromitsu Yamakawa, Saitama, JP;
Hiromitsu Yamakawa, Saitama, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
An imaging lens includes a first-lens having negative power, and which is a meniscus lens the image-side surface of which has concave shape; a second-lens, the object-side surface and the image-side surface of which are aspheric, and which has double-concave shape in the vicinity of an optical axis; a third-lens, the object-side surface and the image-side surface of which are aspheric, and which has double-convex shape in the vicinity of the optical axis; a stop; and a fourth-lens, the object-side surface and the image-side surface of which are aspheric, and which has double-convex shape in the vicinity of the optical axis, which are arranged from the object side in the order mentioned above. Further, formula (1) is satisfied:0.0<5/4<1.0  (1), where