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:
Feb. 12, 1985
Filed:
Apr. 01, 1982
Shozo Ishiyama, Hino, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
A zoom lens system composed of five lens groups having power of positive, negative, positive, negative and positive, among various types of the zoom lens system. The zoom lens system particularly of the type in which all of five lens groups are movable is advantageous in designing the zoom lens system. However, since these five lens groups are moved independently one another, it becomes complicated to design the barrel. In accordance with the present invention, a third positive lens group and one of the other positive lens groups may be moved integrally to effect zooming, such that the moving mechanism for the four moving groups may be used in designing the barrel, thus simplifying the construction of the barrel.