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. 25, 2005
Filed:
Nov. 07, 2002
Koichi Ando, Kamakura, JP;
Koichi Ando, Kamakura, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
A scanner unit is provided, which can make the amounts of light directed to a read line from the opposite sides of the optic axis plane substantially the same, thereby preventing a shade due to an edge of an attachment portion on a document form occurring. In the scanner unit of the present invention, the carriage mirrorand the second carriageof the optical reading device read a document by scanning read lines LL on the document in the scanning direction (R, F) and using light reflected from the document along an optic axis plane PP which contains the read line and extends in perpendicular relation to a document glass table. An exposure lampand a reflectorforming an illumination device illuminate the read line from both sides of the optic axis plane with the light passing along light path L, Land the light passing along light path L, L, respectively. An light amount adjusting member, e.g., a filter, reduces the amount of light passing along the light path L, Lso that the amounts of illumination light directed from both sides of the optic axis plane are made substantially the same at the read line, thereby preventing a shade when reading an edge of an attachment portion on the document.