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. 15, 2000
Filed:
May. 07, 1999
Applicant:
Inventor:
Nobuo Matsui, Omiya, JP;
Assignee:
Fuji Photo Optical Co., Ltd., Omiya, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359700 ; 359676 ; 359689 ; 359699 ;
Abstract
A zoom lens apparatus moves the first lens group and the second lens group by rotating a zoom cam cylinder with cam grooves formed thereon. A plurality of forcing members uniformly forces first cam followers, which are provided on a lens supporting frame for the first lens group, against one sides of the cam grooves. Likewise, the plurality of forcing members uniformly forces second cam followers, which are provided on a lens supporting frame for the second lens group, against the other sides of the cam grooves.