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:
Jun. 15, 2010
Filed:
Apr. 15, 2009
Yasutaka Kashiki, Hino, JP;
Yasuharu Yamada, Hachioji, JP;
Yasutaka Kashiki, Hino, JP;
Yasuharu Yamada, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A zoom lens consists of, in order from its object side, a first lens group of negative refracting power, and a second lens group of positive refractive power. Zooming from a wide-angle end to a telephoto end is implemented by changing a distance between the respective lens groups. The first lens group consists of, in order from its object side, a front unit of negative refracting power, and a rear unit of negative refracting power. The front unit consists of, in order from its object side, a first lens that has negative refracting power, and a second lens with smaller refracting power than the first lens. The rear unit consists of, in order from its object side, a third lens of negative refracting power, a fourth lens of negative refracting power, and a fifth lens that has positive refracting power.