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:
Jun. 02, 1998
Filed:
Dec. 09, 1994
Frank C Genovese, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A fiber optic detection system is used in a color reproduction device to generate color image registration signals. In one embodiment a retroreflector is positioned beneath the photoreceptor belt, the retroreflector being periodically visible through holes formed in a non-image area of the belt. An optical fiber directs flux from a light source onto the photoreceptor belt and periodically illuminates the retroreflector. Light is preferentially reflected back into the fiber with a portion being coupled to a photosensor to provide a signal used for registration purposes. In another embodiment, a plurality of optical fibers are bundled together to form a trunk at the belt illumination end with two branches functioning as the light input and detecting ends. In a still further embodiment, retroreflective marks are formed directly on the surface of a photoreceptor; the several fiber optic embodiments are used to detect the formed marks.