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. 05, 2007
Filed:
Sep. 14, 2005
Koichi Oshita, Tokyo, JP;
Koichi Oshita, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Providing a wide zoom lens system having a wide angle of view in the wide-angle end state and a high speed aperture ratio suitable for a solid-state imaging device with securing high optical performance. The system includes, in order from an object, a first lens group having negative refractive power and a second lens group having positive refractive power. The first lens group includes, in order from the object, a negative meniscus lens having convex surface facing to the object, a negative lens, and a positive lens having convex surface facing to the object. The second lens group includes, in order from the object, a positive lens, and a negative lens. At least one surface of the negative meniscus lens of the first lens group is composed of an aspherical surface. Zooming is carried out by changing a distance between the first and second lens groups. Given conditions are satisfied.