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:
Apr. 21, 1998
Filed:
Sep. 20, 1996
Kumiko Matsui, Yokohama, JP;
Hidehisa Tsuchihashi, Tokyo, JP;
Takahiro Ikeda, Tokyo, JP;
Toru Ochiai, Matsudo, JP;
Seiichi Morimatsu, Kawasaki, JP;
Masashi Tazawa, Kawasaki, JP;
Toshiya Aikawa, Yokohama, JP;
Eisaku Maeda, Sakura, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An image reading device and method for producing a uniformly focused light image on a source document includes a document mount, an imaging device, and a drive assembly for moving at least one of the mounting device and the imaging device in a secondary scanning direction. The image reading device includes a control circuit for establishing multiple designated positions on the source document in the primary scanning direction and in the secondary scanning direction and for calculating the focus position from a signal output from the imaging device for the multiple designated positions. A cam member can be provided to adjust the position of the document mount along the optical axis of the light striking the document, a cam surface of the cam member contacting the document mount.