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. 25, 2015
Filed:
May. 14, 2013
Konica Minolta, Inc., Tokyo, JP;
Keiko Yamada, Sakai, JP;
KONICA MINOLTA, INC., , JP;
Abstract
An imaging lens system includes, from the object side, an aperture stop, a positive first lens convex to the object side, a negative second lens, a positive third lens convex to the object side, a positive meniscus fourth lens convex to the image side, and a negative biconcave fifth lens, and fulfills the conditional formulae 0.8<f/f1<1.30, 0.5<f4/f1<0.90, 0.6<d4/d3<2.0, and 0.80<R3_1/f<2.20, where f is the focal length of the entire imaging lens system, f1 and f4 are the focal lengths of the first and fourth lenses, d3 is the axial thickness of the second lens, d4 is the axial aerial distance between the second and third lenses, and R3_1 is the radius of curvature of the object-side surface of the third lens on the optical axis.