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:
Jun. 01, 2004
Filed:
Nov. 16, 2001
Applicant:
Inventors:
Atsujiro Ishii, Hachioji, JP;
Yuji Miyauchi, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 9/04 ; G02B 9/34 ; G02B 1/308 ; G02B 3/12 ;
U.S. Cl.
CPC ...
G02B 9/04 ; G02B 9/34 ; G02B 1/308 ; G02B 3/12 ;
Abstract
A compact yet low-cost zoom lens system being particularly suited for use with small portable information terminal equipment is provided. The zoom lens system includes, in order from an object side thereof, a first, third and fourth lens groups G G and G that have positive refracting powers and a second lens group G that has negative refracting power. Lens group G remains fixed during zooming and lens groups G and G move during zooming and lens group G is movable during zooming. In one embodiment, the zoom lens system includes a negative lens located nearest to the imaging side of the second lens group G that satisfies condition (7).