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:
May. 16, 2000
Filed:
Dec. 05, 1997
Applicant:
Inventors:
Atsujiro Ishii, Hoya, JP;
Noriyuki Iyama, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359689 ; 359683 ;
Abstract
A zoom lens system for use on compact cameras, which has a high zoom ratio, is provided at a minimum cost. The zoom lens system comprises a first positive lens group G1, a second positive lens group G2 and a third negative lens group G3 with a focal length of the system varied with changes in spacings between the lens groups. The first lens group G1 comprises one positive lens and one negative lens, and the third lens group G3 consists of one negative plastic lens. The zoom lens system satisfies