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. 16, 1993
Filed:
Nov. 21, 1990
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Apparatus for improving illumination in a photoelectric conversion device having a light source for illuminating an original, and at least one photoelectric conversion element for receiving light reflected from the original includes a light guide for guiding light from the light source to the original, the light guide having at least one side surface. A correction section is provided and is disposed adjacent the side surface of the light guide. The correction section acts to suppress total reflection of at least a portion of the light emitted from the light source. Preferably, the correction section comprises regularly spaced light absorbing or light diffusing elements formed on the side of the light guide. The improvement apparatus may be employed in an information processing apparatus such as a facsimile machine.