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:
Feb. 10, 2009
Filed:
Dec. 27, 2005
Mamoru Terada, Sakai, JP;
Kenshi Nabeta, Osaka, JP;
Toru Nakatani, Sakai, JP;
Konica Minolta Photo Imaging, Inc., Tokyo, JP;
Abstract
A taking lens system is provided with, from the side of the object to be photographed, a first lens unit (G) having positive optical power, a second lens unit (G) having negative optical power, a third lens unit (G) having positive optical power and a fourth lens unit (G) having positive optical power. Zooming is performed by moving the first to fourth lens units (G) to (G), and focusing is performed by moving the fourth lens unit (G). When the distance from the most object-to-be-photographed side surface (r) of the first lens unit (G) to the imaging surface at the wide angle end is TLw, the overall focal length of the taking lens system at the telephoto end is ft, the overall focal length of the taking lens system at the wide angle end is fw, and the focal length of the first lens unit (G) is fl, relationships 0.5≦TLw/ft≦1.0 and 6.0≦fl/fw≦20.0 are satisfied.