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:
Jun. 25, 1996
Filed:
Sep. 03, 1993
Applicant:
Inventors:
Atsushi Shibayama, Kawasaki, JP;
Susumo Sato, Chiba, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359689 ; 359554 ; 359686 ;
Abstract
A zoom lens includes a first lens group having positive refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power. In zooming from the wide-angle end to the telephoto end, the distance between the first and second lens groups is increased and the distance between the second and third lens groups is decreased. The second lens group includes a front group having low refractive power and a rear group having positive refractive power. The rear group is movable in a direction almost perpendicular to the optical axis.