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:
Dec. 29, 1981
Filed:
Nov. 18, 1980
Applicant:
Inventors:
Kohji Saito, Sayama, JP;
Kazuo Kondo, Chofu, JP;
Assignee:
Osawa Precision Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G03B / ;
U.S. Cl.
CPC ...
354195 ; 350255 ;
Abstract
A zoom lens system for a camera comprises a focusable lens, a variator lens for making a focal length of the lens system variable and a compensator lens for compensating the displacement of its image point caused by the variator lens. A zoom operating sleeve is provided which is rotatable about an optical axis and formed on its inner surface with first and second cam surfaces according to which lens holders for the variator and compensator lenses are respectively controlled in relative movement with the aid of a spring for resiliently urging the lens holders against the cam surfaces.