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. 29, 2002
Filed:
Jul. 27, 2000
Takeshi Mochizuki, Ibaraki, JP;
Kazutaka Setoma, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
In an optical scanner, while a plurality of lens elements comprise scanning lens optics, the angle (&thgr; of the line dropped normal to the first face of a lens element ( ) positioned the closest to the medium to be scanned which is directed to a light deflecting means at the point where the principal ray of a light beam incident at the scan start end crosses the first face is generally equal to the angle (&thgr; ′) of the line dropped normal to the second face of the lens element which is directed to the medium to be scanned at the point where the principal ray crosses said second face, and the angle (&thgr; ) of the line dropped normal to the first face at the point where the principal ray of a light beam incident at the scan finishing end crosses said first face is generally equal to the angle (&thgr; ′) of the line dropped normal to said second face at the point where the principal ray crosses the second face.