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. 24, 2012
Filed:
Nov. 14, 2007
Toru Miyajima, Hachioji, JP;
Toru Miyajima, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A zoom lens system includes, in order from an object side, a first lens unit Ghaving a positive refracting power, a second lens unit Ghaving a negative refracting power, a third lens unit Ghaving a positive refracting power, and a fourth lens unit Ghaving a positive refracting power, and at the time of zooming from a wide angle end to a telephoto end, a space between the lens units changes, and the second lens unit includes not more than three lenses, and a biconcave negative lens which satisfies the following conditional expression (1) is disposed nearest to the object side, in the second lens unit, and (the zoom lens system) is characterized by satisfying the following conditional expression (2)−0.1<<0.5  (1)3.0<<12.0  (2).