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. 05, 2007
Filed:
Dec. 13, 2004
Hiroyuki Minakata, Hachioji, JP;
Hiroyuki Minakata, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
The invention relates to a zoom optical system that can offer an effective tradeoff between low cost and size reductions, and electronic equipment that incorporates the same. The zoom optical system comprises, in order from an object side thereof, a first lens group Gof negative refracting power, an aperture stop S, a second lens group Gof positive refracting power, a third lens group Gof negative refracting power and a fourth lens group Gof positive refracting power, and satisfies the following condition.2<||<200Here dis a spacing between Gand Gat a wide-angle end, dis a spacing between Gand Gat a telephoto end, dis a spacing between Gand Gat the wide-angle end, and dis a spacing between Gand Gat the telephoto end.