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. 30, 2017
Filed:
Oct. 09, 2015
Hoya Corporation, Tokyo, JP;
Daisuke Koreeda, Saitama, JP;
HOYA CORPORATION, Tokyo, JP;
Abstract
An imaging optical system includes a positive first lens element having a convex surface on the object side, a negative second lens element having a concave surface on the image side, a third lens element, a positive fourth lens element, a fifth lens element, and a negative sixth lens element provided with at least one aspherical surface that has inflection points other than at an optical axis thereof. The following conditions (1) and (2) are satisfied:0.86<12<1.20  (1), and−0.71<(11−12)/(11+12)<−0.20  (2),wherein f designates the focal length of the imaging optical system, fdesignates the combined focal length of the first and second lens elements, and rand rdesignate the radius of curvatures of surfaces on the object side and image side of the first lens element, respectively.