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:
Dec. 08, 2009
Filed:
Jun. 20, 2008
Yoshihito Souma, Sakai, JP;
Yoshihito Souma, Sakai, JP;
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Abstract
A zoom lens includes, in order from an object side thereof: a first lens group having a negative optical power and comprising a reflection optical element; a second lens group having a positive optical power; a third lens group having a negative optical power; a fourth lens group having a positive optical power; and, a fifth lens group. The first lens group and the fourth lens group are positioned at a fixed distance and at least the second lens group, the third lens group and the fifth lens group move along an optical axis, for varying a power of the zoom lens from a wide-angle end to a telephoto end. The zoom lens satisfies a predetermined expression relating to a focal length of the first lens group, and a focal length of the zoom lens at the wide-angle end.