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:
Mar. 21, 2000
Filed:
Oct. 21, 1998
Applicant:
Inventors:
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
23546243 ; 23547201 ;
Abstract
A dust-proof plate transmits light emitted by red light emitting diode unit. When the dust-proof plate reflects a part of the light, the reflected light incident on an image forming optical system becomes an optical noise in reading the image information of a reading object. In order to prevent the optical noise from being generated, an incident-side opening of a lens barrel is positioned proximately to the dust-proof plate. Thus, the light reflected from the dust-proof plate can be prevented from being introduced into the lens barrel.