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. 23, 2009
Filed:
Nov. 09, 2006
Minoru Ueda, Tenri, JP;
Minoru Ueda, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A zoom lens in the present invention is composed of a first lens group Ghaving a fixed distance from the image plane side and negative refracting power, a second lens group Ghaving positive refracting power and moving during zooming, a third lens group Ghaving positive refracting power and moving during zooming, and a fourth lens group Ghaving a fixed distance from the image plane side and positive refracting power. The first, the second, the third and the fourth lens groups G-Gare arranged in order from the object side to the image plane side. The third lens group Gincludes an aperture stop s, a lenshaving positive refracting power and a lenshaving negative refracting power, being arranged in order from the object side to the image plane side. The zoom lens is high performance and large in zoom ratio and is compact due to the simple structure.