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. 19, 2010
Filed:
Mar. 27, 2009
Kenichi Sato, Saitama, JP;
Kenichi Sato, Saitama, JP;
Fujinon Corporation, Saitama-shi, JP;
Abstract
A zoom lens is provided and includes: in order from an object side of the zoom lens, a first lens group adapted to be fixed during power-varying of the zoom lens, the first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path thereof, and a biconvex lens of a positive lens made of a resin material and having at least one aspherical surface; a second lens group adapted to move during the power-varying, the second lens group having a negative power and including two lenses; a third lens group adapted to be fixed during the power-varying and including one positive lens; and a fourth lens group adapted to move during the power-varying and during focusing of the zoom lens, the fourth lens having a positive power and including in order from the object side, a cemented lens having a positive power, and a negative lens made of a resin material and having at least one aspherical surface and a concave surface on an image side of the fourth lens.