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:
Apr. 23, 2002
Filed:
Apr. 16, 1999
Michio Kikuchi, Ebina, JP;
Yoshiya Imoto, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
After light transmitted through platen glass is incident on a lens and focused, the light is transmitted through a parallel flat plate and imaged in a CCD image sensor. The resolving power of the CCD image sensor is 600 dpi in this case and one pixel is 8 &mgr;m. A parallel flat plate is provided with a function for displacing all rays incident on the plate in parallel. The quantity of parallel displacement differs depending upon each wavelength. Therefore, lateral chromatic aberration can be reduced to the extent that it is ignorable (approximately {fraction (1/10)} of pixel size) by making reflected light outgoing from the lens and having lateral chromatic aberration incident on the parallel flat plate.