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:
Feb. 21, 1989
Filed:
Jan. 14, 1988
Applicant:
Inventor:
Satoru Uchida, Atsugi, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250578 ; 358293 ; 355 68 ;
Abstract
An image reading system for optically reading an original includes a convergent type light-emitting diode array as a light source, a white level reference and an image sensor disposed opposite to the white level reference. The light emitted from the LED array has a light intensity distribution which reduces in level in a transverse direction from an irradiation axis. The LED array is preferably so disposed with its irradiation axis passing a mid-point between the white level reference and an intersection point between an original surface travelling line and a straight line extending between the white level reference and the image sensor.