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:
Oct. 23, 2001
Filed:
May. 14, 1999
Applicant:
Inventor:
Noriyuki Iyama, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/514 ;
U.S. Cl.
CPC ...
G02B 1/514 ;
Abstract
A zoom lens system for compact cameras comprising a first positive lens unit, a second positive lens unit and a third negative lens unit: the first lens unit comprising at least a positive lens component which is disposed on the object side, and a negative meniscus lens component which is disposed on the image side of the positive lens component and has a concave surface on the image side. The zoom lens system is configured to perform zooming by varying an airspace reserved between the first lens unit and the second lens unit as well as an airspace reserved between the second lens unit and the third lens unit, and has a high zoom ratio and high optical performance.