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:
Jan. 01, 2013
Filed:
Jun. 24, 2010
Ryoko Otomo, Saitama, JP;
Ryoko Otomo, Saitama, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided is a fast image reading lens system capable of achieving compactness and satisfactorily correcting various aberrations. The image reading lens system includes, in order from an object side: a positive first lens of which a convex surface faces toward the object side; a second lens formed as a biconcave lens; a third lens formed as a biconvex lens; a positive fourth lens of which a convex surface faces toward an image side; and a negative fifth lens of which a convex surface faces toward the image side. Assuming that a focal length of the whole lens system is f, a focal length of the fourth lens is f, and a space between an image side surface of the fourth lens and an object side surface of the fifth lens on an optical axis is D, the lens system satisfies the following conditional expressions: 0.06<D/f<0.16, and 0.77<f/f<1.81.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile