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:
May. 26, 2009
Filed:
Aug. 19, 2004
Applicants:
Yasuo Sakurai, Kanagawa, JP;
Masashi Kohchi, Tokyo, JP;
Inventors:
Yasuo Sakurai, Kanagawa, JP;
Masashi Kohchi, Tokyo, JP;
Assignee:
Ricoh Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/04 (2006.01); G02B 6/32 (2006.01); F21V 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lighting device used in an image forming apparatus includes point light sources that emits rays; and a condensing body that is arranged in a direction of the rays emitted from the point light source and that condenses the rays on a surface of a document, which is placed on a contact glass, within a reading width in a sub-scanning direction of the document. The condensing body is arranged in a direction in which angles of all rays, which pass through the condensing body, are smaller than a critical angle of total reflection on the contact glass.