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:
Jan. 01, 2008
Filed:
Jul. 19, 2005
Atsuo Masui, Sakai, JP;
Hiromichi Nose, Toyokawa, JP;
Mamoru Terada, 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 comprises three lens units of negative, positive, positive configuration. The second lens unit Grcomprises three single lens elements of, from the object side, a positive lens element L, a negative meniscus lens element Lconvex to the object side and a positive lens element L. A condition 1.0<|P22/P21|<2.0 (P21 is the optical power of the object side positive lens element Lin the second lens unit GR, and P22 is the optical power of the negative meniscus lens element Lin the second lens unit GR) is satisfied.