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:
Sep. 16, 2003
Filed:
May. 29, 2001
Hitoshi Hagimori, Ikoma, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
Taking lens device has zoom lens system comprised of plurality of lens units and achieves zooming by varying unit-to-unit distances and image sensor that converts optical image formed by zoom lens system into electrical signal. Zoom lens system comprised of, from the object side, first lens unit having negative optical power, second lens unit having positive optical power, and third lens unit having positive optical power. First, second, and third lens units are each comprised of one lens element, and at least the first and second lens units are moved along the optical axis during zooming. Following conditional formula is fulfilled: 0.2<tW /fW<1.2, where tW represents optical path length from the most image-side lens surface in second lens unit to the most object-side lens surface in third lens unit at wide-angle end, and fW represents focal length of the entire zoom lens system at wide-angle end.