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:
Mar. 04, 2008
Filed:
Dec. 14, 2006
Kouki Hozumi, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Masashi Hankawa, Hachioji, JP;
Toru Miyajima, Hachioji, JP;
Kouki Hozumi, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Masashi Hankawa, Hachioji, JP;
Toru Miyajima, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A zoom lens system comprising, a first negative lens unit; a second positive lens unit; and a third negative lens unit, wherein a space between the second and third lens units changes during magnification change or focusing operation; the second lens unit and the third lens unit move only to the object side during the magnification change from a wide-angle end to a telephoto end so that a space between the first and second lens units is narrower in the telephoto end than in the wide-angle end; the first lens unit comprises a negative lens and a positive lens; the second lens unit comprises at most three lenses; the third lens unit comprises a negative lens; and the following condition (1) is satisfied:0.7<()/()<1.2.   (1)