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. 09, 2017
Filed:
Dec. 05, 2014
Ricoh Imaging Company, Ltd., Tokyo, JP;
Minoru Murayama, Saitama, JP;
RICOH IMAGING COMPANY, LTD., Tokyo, JP;
Abstract
A zoom lens system includes a positive first lens group, a negative second lens group, a third lens group including at least one positive lens element or one negative lens element, a positive fourth lens group, and a negative fifth lens group, in that order from the object side. At least the first, second, fourth and fifth lens groups are moved during zooming from the short to long focal length extremities, and the following conditions (1) and (2) are satisfied:−6.5<1/5<−4.6  (1),and−1.2<3<0.7  (2),wherein f, fand fdesignate the focal lengths of the first and fifth lens groups, respectively, and fw designates the focal length of the entire zoom lens system at the short focal length extremity.