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. 25, 2013
Filed:
Nov. 04, 2008
Yasunari Fukuta, Hachioji, JP;
Yasunari Fukuta, Hachioji, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A variable power optical system () comprises a first lens group () having a negative optical power, a second lens group () having a positive optical power, and a third lens group (). The first to third lens groups are arranged in order from the object side to the image side. The first lens group () is composed of one negative lens () and is fixed in variable power. The third lens group () includes at least one aspherical surface. When the third lens group is divided into a front group and a rear group with the largest air space in the third group, the front group has a negative optical power, and the rear group has a positive optical power.