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:
Apr. 09, 2013
Filed:
May. 29, 2012
Mayu Miki, Musashino, JP;
Akinori Nishio, Hachioji, JP;
Takeshi Hosoya, Machida, JP;
Minoru Ueda, Sagamihara, JP;
Akiko Naito, Hachioji, JP;
Tomoyuki Satori, Yokohama, JP;
Tetsuya Yanai, Kodaira, JP;
Mayu Miki, Musashino, JP;
Akinori Nishio, Hachioji, JP;
Takeshi Hosoya, Machida, JP;
Minoru Ueda, Sagamihara, JP;
Akiko Naito, Hachioji, JP;
Tomoyuki Satori, Yokohama, JP;
Tetsuya Yanai, Kodaira, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A zoom lens comprises in order from an object side, a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, and a fifth lens unit having, respectively, a positive, negative, positive, negative, and positive refractive power. At the time of zooming from a wide angle end to a telephoto end, the first, third, and fourth lens units move toward the object side. A distance between the first and second lens units increase, a distance between the second and third lens units decrease, a distance between the third lens unit and the fourth lens unit changes, and a distance between the fourth lens unit and the fifth lens unit increases. The zoom lens satisfies the following expressions:1.54<β/β<3.0  (1a)1.0<β/β<5.0  (2)1.0<β/β<3.0  (3).