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. 13, 1985
Filed:
Mar. 08, 1984
Applicant:
Inventor:
Mitsuo Ohnuki, Sagamihara, JP;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350429 ;
Abstract
A lens tube for a high vari-focal ratio zoom lens is arranged to individually effect movement of a plurality of lens groups for the purpose of zooming, and to integrally move a plurality of lens groups of the purpose of focusing, and arranged so that a double helicoid mechanism for driving the first lens group is provided on a member constituting the lens tube, the lens tube being arranged so that operation of a zooming mechanism serves to move a focusing mechanism, for the purpose of compensation, by means of the helicoid mechanism mentioned above, and a cam mechanism provided on other members constituting the lens tube.