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:
Mar. 21, 2000
Filed:
Feb. 12, 1999
Kazunori Ohno, Omiya, JP;
Fuji Photo Optical Co., Ltd., Omiya, JP;
Abstract
A wide-angle zoom lens of simple construction, having only four lens elements and three lens groups is disclosed. The refractive power of the lens groups is, in order from the object side, negative, positive and positive. An aperture stop 1 is arranged between the first lens group G.sub.1 and the second lens group G.sub.2. The lens is intended for use in a compact electronic still camera having a small overall length as well as a small lens diameter. When zooming, the position of the second lens group and the third lens group is varied along the optical axis. Predetermined conditions are satisfied in order to obtain a compact zoom lens having high optical performance over the entire range of zoom.