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:
Oct. 16, 2018
Filed:
Jun. 26, 2014
Nikon Corporation, Minato-ku, Tokyo, JP;
Keiichi Nakamura, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens includes, in order from the object side: a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, and a fourth lens group (G) having positive refractive power. Upon zooming from the wide angle end state to the telephoto end state, the interval between each lens group changes and the fourth lens group (G) moves to the image side after having once moved to the object side. The third lens group (G) has, in order from the object side, a positive lens, a positive lens, and a negative lens. The zoom lens satisfies the following conditional expression: 2.50<TLt/(fw*ft)<3.30, where TLt is the total length of the zoom lens in the telephoto state, fw is the focal distance of the total zoom lens system in the wide angle state, and ft is the focal distance of the total zoom lens system in the telephoto state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile