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:
Sep. 29, 1992
Filed:
May. 13, 1991
Applicant:
Inventor:
Yoshitaka Masuda, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250234 ; 355 45 ;
Abstract
An image reading apparatus includes an illumination unit for illuminating an image, a projection unit for projecting the image illuminated by the illumination unit onto a predetermined surface, a reflection unit arranged between the projection unit and the predetermined surface, and a reading unit for reading image information of the image projected by the projection unit through the reflection unit. An optical path length between the reading unit and the reflection unit is equal to an optical path length between the reflection unit and the predetermined surface.