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. 04, 2001
Filed:
Feb. 07, 2000
Takanori Yamanashi, Kokubunji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
The invention relates to a zoom lens system which, albeit having a high zoom ratio, is reduced in terms of length during lens collapsing and at the wide-angle end as well as the telephoto end, with well-corrected aberrations. The zoom lens system comprises a front lens group G,located nearest to the object side and a rear lens group G,located nearest to the image side with at least one lens group located between G,and G,The group G,has positive or negative refracting power and the group G,has negative refracting power. For zooming from the wide-angle end to the telephoto end, a separation between adjacent lens groups varies. Specific conditions are satisfied with respect to the focal length of G,the amount of movement of G,and the zoom ratio shared by G