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:
May. 22, 2007
Filed:
Jul. 22, 2005
Mamoru Terada, Sakai, JP;
Hiromichi Nose, Toyokawa, JP;
Atsuo Masui, Sakai, JP;
Konica Minolta Photo Imaging, Inc., Tokyo, JP;
Abstract
An image forming device is provided with: a zoom lens system TL that performs magnification varying by changing the distance between the lens units; and an image sensor SR that converts an optical image formed by the zoom lens system TL into an electric signal. The zoom lens system TL includes at least a negative first lens unit GRand a positive second lens unit GR, and at least the first lens unit GRand the second lens unit GRmove in zooming from the wide angle end (W) to the telephoto end (T). The second lens unit GRincludes three lens elements of, from the object side, a positive meniscus lens element Lconvex to the object side, a negative lens element Land a positive lens element L, and the following condition is satisfied:−1.0<()/()<0.0(CRis the front radius of curvature of the most object side lens element Lin the second lens unit GR, and CRis the rear radius of curvature of the most object side lens element Lin the second lens unit GR).