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:
Nov. 18, 1986
Filed:
Dec. 02, 1982
Applicant:
Inventor:
Tooru Fujii, Hino, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350427 ; 350423 ; 350450 ;
Abstract
A compact zoom lens system having excellent performance and comprising a first lens group having positive refractive power, a second lens group having negative refractive power and a third lens group having positive refractive power, said third lens group being fixed relative to the image plane, said second lens group being moved along the optical axis for varying magnification, and deviation of the image position caused by moving said second lens group is compensated by moving said first lens group.