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:
Dec. 30, 2008
Filed:
Nov. 07, 2006
Masashi Hankawa, Hachioji, JP;
Masahito Watanabe, Hachioji, JP;
Kouki Hozumi, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Takahiro Amanai, Sagamihara, JP;
Toru Miyajima, Hachioji, JP;
Masashi Hankawa, Hachioji, JP;
Masahito Watanabe, Hachioji, JP;
Kouki Hozumi, Hachioji, JP;
Kazuya Nishimura, Akiruno, JP;
Takahiro Amanai, Sagamihara, JP;
Toru Miyajima, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A three-unit zoom lens system comprising, in order from an object side, a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive or negative refractive power, wherein during magnification change from a wide-angle end to a telephoto end, a space between the first lens unit and the second lens unit narrows, the second lens unit and the third lens unit move toward the only object side, and a space between the second lens unit and the third lens unit changes during a focusing operation.