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:
Feb. 13, 2007
Filed:
Dec. 27, 2002
Tomoyuki Satori, Kawagoe, JP;
Masashi Hankawa, Hachioji, JP;
Tomoyuki Satori, Kawagoe, JP;
Masashi Hankawa, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
The invention relates to a four- or five-group zoom lens that ensures wide-angle performance, high zoom ratios and high quality with a more reduced number of lenses than ever before. The zoom lens comprises, in order from its object side, a first lens group Ghaving positive power, a second lens group Ghaving negative power, a third lens group Ghaving positive power, a fourth lens group Ghaving negative power and a fifth lens group Ghaving positive power. The fourth lens group Gcomprises one lens. For zooming, all the spacings between the respective lens groups vary and the first lens group Gmoves in such a way as to arrive at the object side at the telephoto end position rather than at the wide-angle end position.