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. 18, 2010
Filed:
Feb. 26, 2008
Tomoyuki Satori, Kawagoe, JP;
Toru Miyajima, Hachioji, JP;
Masahiro Imamura, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Tomoyuki Satori, Kawagoe, JP;
Toru Miyajima, Hachioji, JP;
Masahiro Imamura, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
In a zoom lens system, at a time of zooming from a wide angle end to a telephoto end, when focused on an object at a longest distance, at the telephoto end, a first lens unit moves to be positioned more toward an object side, than at a wide angle end, at the telephoto end, a second lens unit moves to be positioned more toward an image side, than at the wide angle end, at the telephoto end, an aperture stop and a third lens unit moves to be positioned more toward the object side, than at the wide angle end, and a combined system of the first lens unit and the second lens unit at the wide angle end has a negative refracting power, and at the time of zooming from the wide angle end to the telephoto end, the second lens unit is positioned more toward the object side than a position of the second lens unit at the wide angle end, and the first lens unit moves to be positioned more toward the object side, than at the wide angle end, at the intermediate zoom state, and in the intermediate zoom state, the aperture stop, the third lens unit, and an object point of the third lens unit move to be positioned more toward the object side, than at the wide angle end, and the zoom lens system satisfies predetermined conditional expressions.