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. 07, 1983
Filed:
Jun. 15, 1981
Frederick A Seedhouse, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An optical system for scanning a document in an object plane includes a pivoting mirror and a projection lens which projects an image onto the surface of a photoreceptor. By rotating and translating the projection lens while simultaneously moving an aperture slit in a direction of movement opposite to the movement of the photoreceptor, a condition is constantly maintained wherein the object plane, lens plane and image plane are maintained parallel thereby eliminating field tilt. With this configuration, the image is also precessed onto the photoreceptor providing a precession distance which can be used to relax constraints normally imposed by scan return conditions. In a specific embodiment, a double reflector arrangement on the image side of the projection lens is used to maintain total system conjugate.