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:
Apr. 22, 2014
Filed:
Mar. 15, 2013
Keiji Matsusaka, Osaka, JP;
Hiroaki Tanaka, Sakai, JP;
Keiji Matsusaka, Osaka, JP;
Hiroaki Tanaka, Sakai, JP;
Konica Minolta Optics, Inc., Osaka, JP;
Abstract
An imaging optical system, an imaging device, and a digital apparatus have a four lens construction with positive, negative, positive, and negative refractive powers. A surface position at the maximum effective diameter of the second lens element is located on the object side than a surface vertex thereof. The fourth lens element has an inflection point at a position other than the intersection of the optical axis and the fourth lens element. The optical system satisfies the following conditions.0.7<1/<5−0.8<(1+2)/(1−2)<3−3<(3+4)/(3−4)<20.03<2/<0.22>72ν4>50, and0.55<<0.8